Grease Gun Detailed FAQ Guide - HYMA Lube

Q1. what is grease gun

A grease gun is a lubrication tool that helps you push grease into the parts of a machine that need it.

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It conveniently delivers grease into small fittings. You typically use grease guns to maintain bearings and mechanical interfaces where continuous lubrication is required.

You load grease into the gun either via pre-filled cartridges or manual packing. Also, it can be done via bulk suction.

It uses only thicker heavy grease, not thin oil.

Common type of grease guns are (based on its operating method):

• Manual Grease Guns (Lever/Pistol/Push)
• Battery Grease Guns
• Pneumatic (Air) Grease Guns
• Electrical Grease Gun

Q2. what is grease gun working principle

As grease guns have different types, their working principles change with types. However, it fundamentally revolves around pressure.

It operates by using pressure (mechanical or pneumatic) to move grease from its body to a lubrication point.

In simple words, you pressurize the grease to push it forward through the nozzle and deliver it to the required lubrication point. You use grease gun fittings to deliver it to the parts of your machine.

For a manual grease gun, you press the lever or trigger. It then drives a plunger forward inside the barrel to build pressure and force grease through the outlet tube or flexible hose.

Electric or battery grease guns use internal motors to build that pressure. For pneumatic models, compressed air powers the internal piston to maintain continuous grease flow once the trigger is activated.

No matter which type you are using, the basic principle remains identical.

Q3. what is grease gun structure

There are a few key parts in a grease gun that work together to push grease into machine fittings.

When you start from the bottom, you have the follower handle and follower rod. These pull the spring-loaded plunger back when loading grease. The plunger presses the grease forward inside the barrel. Barrel is the long cylinder where grease is stored.

At the top, you have the head that connects everything. Inside the head, there’s an outlet valve body that controls how grease exits the gun. The handle/lever attaches to the head, and when you pump it, it applies pressure to move the grease.

Flexible hose or fixed tube is attached to the head of the grease gun. This hose ends with a coupler or hydraulic coupler. You lock it onto the machine’s grease fitting tightly.

The basic structure of follower rod, barrel, plunger, head, hose, and coupler, almost stays the same across all types of grease guns.

Q4. what is grease gun main components

Here are the main components of a grease gun:

• Handle/Lever – This is what you pull or push by hand to create pressure and start moving the grease.
• Barrel – It is a long cylindrical body that holds the grease cartridge or loose grease inside the gun.
• Follower Rod and Follower Handle – It pulls back to load grease and helps push the grease forward by spring pressure.
• Spring – It is a strong coil inside the barrel that pushes the plunger as well as keeps pressure on the grease.
• Plunger – It is a disk-shaped part that moves inside the barrel and pushes grease towards the outlet when you pump the handle.
• Grease Tube – It stores the grease inside the barrel and directs it to the plunger.
• Head – The top part where the barrel connects and where the grease gets ready to move toward the hose.
• Outlet Valve Body – It controls the flow of grease from the gun to the hose.
• Flexible Hose or Fixed Tube – It carries grease from the gun’s head to the coupler at the end.
• Coupler/Hydraulic Coupler – It locks onto the grease fitting of your machine to deliver the grease properly without leaking.

Q5. who can operate grease gun

The simple answer is: anyone can use a grease gun as long as they have the knowledge and training first. However, you commonly see mechanics, engineers, maintenance workers, and industrial machine operators use grease guns for their daily applications.

Even DIY (Do It Yourself) users who like to maintain their equipment can use it. Homeowners and small shop workers can also use manual grease guns or battery-powered types (like an 18v grease gun or 20v grease gun) if they already know the basics.

If you are trained about using it and understand how much pressure to apply, how to avoid air locks as well as how to prevent over or under-lubrication, you can operate a grease gun easily.

However, in a serious industrial environment, usually trained lubrication experts are the ones operating grease guns.

Q6. what factor affect grease gun price

If you see a price difference for grease guns, it’s usually because of these following factors.

Type of Grease Gun

You can get cheaper manual grease guns because they are simple. Automatic grease guns are more expensive due to added technology.

Material Quality

The build quality also determines the price. A plastic-made grease gun will cost you less than a stainless steel or aluminum one. It is because they last longer and resist wear.

Capacity

Higher capacity grease guns featuring larger grease tube or cartridge size are costly because they can store more grease.

Pressure Rating

Guns designed for high-pressure industrial work cost more, as they need stronger components to handle tough jobs.

Brand Reputation

Well-established brands usually list their grease gun comparatively expensive. It could be due to their reputation and product quality.

Special Features or Grease Gun Accessories

Features like variable pressure control, air bleeder valves, locking couplers, or ergonomic handles add to the price. Accessories like grease gun fittings, grease gun hoses, and nozzles can also add up the extra cost.

Market Demand

When supply drops or demand rises, prices can temporarily increase, just like any other industrial tool.

Q7. what is different types of grease gun and their applications

Grease gun types are designed because of different application needs. The following are some common types and where each one is best used:

Q8. what is advantages of grease gun

If you are a grease gun manufacturer or grease gun supplier, you already know how important precise lubrication is. Mostly in industrial applications, where performance, downtime, and efficiency are of utmost importance.

Grease guns do exactly that. However, they do more than just push grease into fittings. The following are the key advantages you get when using a grease gun:

• Grease gun helps you apply grease exactly at the required point/area. Even if the lubrication points are in tight or hard-to-reach spots.
• You can control the amount of grease applied with every pump. Therefore, you avoid the chances of over-lubrication.
• Each grease gun dedicatedly uses a specific grease type so you also avoid cross-contamination.
• You improve safety and cleanliness by keeping grease off hands and surrounding components.
• You also prevent machine failure by reaching grease fittings that would be difficult to service manually.
• Depending on the application needs, you have the freedom to choose from manual, pneumatic, battery, or electrical grease gun
• Grease guns are easy to operate. You can use them without needing any extensive training.
• You can do faster grease delivery compared to full scale lubrication systems.
• You also get multiple options for accessories like flexible hoses or precision couplers that match the requirements.
• Grease guns provide consistent volume per stroke so you also lower the grease waste.
• Identification and storage (proper labeling) becomes easier when you use grease gun

Q9. what is disadvantages of grease gun

Along with several advantages, grease guns also have a few limitations you should keep in mind.

Here’re are some disadvantages of grease guns:

• Due to its normal manual operation, grease gun often results in inconsistent lubrication. You need to measure each stroke properly.
• Manual control varies between users so chances of overgrease or undergrease.
• You need to clean the grease gun nozzle before every use to avoid contamination.
• You may face safety hazards when lubricating machines that are running or hard to reach.
• If you apply more pressure than a bearing seal can handle, it can cause overpressure damage.
• Manual greasing takes longer compared to automatic lubrication systems.
• Rigid grease gun setups cannot reach tight or hard-to-reach points.
• They need more care especially when using high-pressure grease guns to avoid any personal injury.

Q10. what is function of grease gun in lubrication system

Nowadays, you notice that grease guns are used as a lubrication delivery mechanism. Your gun plays one specific role in the lubrication system.

The core function of a grease gun in a lubrication system is to transfer grease precisely from the gun’s barrel into the lubrication channel through a controlled interface. It moves grease from the reservoir into the lubrication point with controlled pressure and quantity. That’s its only job in a lubrication system.

You use a grease gun to apply the exact amount of lubricant needed at grease fittings. You don’t rely on gravity or splash, you apply pressure to force grease into hard-to-reach bearings or joints through a sealed coupler.

You can also attach flexible hoses as well as needle adapters depending on the layout of the system.

In centralized lubrication systems, you can rely on the gun to generate consistent output, usually 0.5 to 3 grams per stroke. It is also adjustable based on the type and calibration.

Q11. what lubrication system can use grease gun

Grease gun is a versatile lubrication tool that also fits in with several lubrication systems. Instead of using it randomly, you use it in specific types of lubrication systems that allow manual or semi-automatic grease application.

You use a grease gun in manual lubrication systems. Here, you personally pump grease into fittings like Zerk fittings on machinery. You manually control the amount, pressure, and direction using either a lever, pistol-grip, battery, or air-powered grease gun.

You also use a grease gun in semi-automatic lubrication systems. In these systems, you manually trigger the initial grease delivery using the gun. Once primed, internal channels distribute the grease across multiple points.

You can also use a grease gun in centralized lubrication systems. In this case, you use it to fill or top up a central reservoir that later distributes grease automatically to different components. It helps you maintain pressure and avoid contamination during the refill process.

In all these systems, you connect your grease gun to the system’s grease fittings. You apply controlled pressure to push grease directly into bearings, joints, or internal channels without dismantling equipment.

Q12. what lubricant can you use in grease gun

Based on the system’s or fittings requirements, your grease gun can use various lubricants.

The following is the list of lubricants you can use in a grease gun:

Note: Manual, electrical, or battery grease guns can all use these greases depending on the cartridge size or grease format they support.

• Multipurpose Grease (Lithium or calcium-based multipurpose grease for general machinery and fittings)
• High-Temperature Grease (Grease to perform at high operating temperatures such as wheel bearings)
• Synthetic Grease (Used in battery grease guns or 18V, 20V, and 12V grease guns for better performance in extreme cold or heat)
• Extreme Pressure (EP) Grease (EP grease for heavy-load applications like U-joints and chassis lubrication)
• Marine Grease (Marine-grade grease in areas prone to water washout)
• Food-Grade Grease (NSF-approved grease in food-processing lubrication systems)
• Moly Grease (Moly-fortified grease for high-pressure, slow-moving parts like CV joints and splines)

Q13. what is grease gun application

If you are a grease gun supplier or manufacturer, knowing how and where to use a grease gun is as important as selling or having one.

A single grease gun cannot accommodate multiple applications because it is not a general-purpose tool. It is designed for specific, high-contact lubrication tasks where other methods fall short.

Applications of grease gun

Automotive Maintenance

Heavy-duty vehicles and old ones often need to lubricate the joints like suspension and U-joints. For that purpose, you usually use a grease gun to easily apply grease to these points. A manual or pistol grip grease gun is ideal for this task due to accessibility under the vehicle.

Construction Machinery

Construction machines (excavators and bulldozers) operate under harsh and high-pressure conditions, so EP (extreme pressure) grease is applied using a high-pressure grease gun, typically pneumatic or battery-operated. It is capable of quick delivery in the field.

Agricultural Equipment

During rugged operation, you use grease gun to apply lubrication to tractor and harvesters pivot points and hydraulic arms. You can use a battery grease gun with flexible hose that can help reach awkward spots.

CNC and Manufacturing Machines

CNC and manufacturing machines often have sensitive parts and regular lubrication prevents wear. You use grease gun to apply precise amounts of lubricant to reduce backlash and maintain motion accuracy. You can use small pistol-grip or automatic grease guns here for controlled discharge.

Factory and Processing Systems

You apply grease on electric motors and automation systems using a grease gun. Manual or electrical grease guns, when you often pair them with color-coded fittings and accessories, can help you control volume precisely in routine plant maintenance.

Gardening and Landscaping Equipment (Domestic use)

Domestic uses and gardening also use grease guns for those small greaseable points. You can use a small hand-lever or mini grease gun to apply lightweight grease in these consumer-grade tools.

Aviation and Aerospace

Aircraft components are mostly exposed to extreme pressure changes and temperature fluctuations. You can use manual or calibrated electrical grease guns with special fittings and apply high-grade aviation-specific grease using to avoid over-lubrication or contamination.

Wind Turbines

Turbines require periodic greasing of blade bearings and yaw/pitch mechanisms located high above ground level. You can use a cordless 18V or 20V grease gun with long hose extensions, as manual greasing is impractical in turbine nacelles.

Q14. can i use grease gun instead of oil

The simple and straightforward answer to this question is no, you shouldn’t use a grease gun instead of oil.

You should be aware of the fact that grease and oil are not the same. They cannot be used interchangeably. Also, grease guns are not designed to handle oil.

Grease gun is designed to deliver thick and semi-solid lubricants (grease) under high pressure to specific points via grease fittings. Heavy load parts like bearings and joints need grease.

Oil, on the other hand, is a comparatively very thin fluid and flows freely. You use oil in oil guns or cans for lubrication in high-speed or circulating systems. You use oil for parts in the engines or hydraulic systems.

If you try to load oil into a grease gun, it will likely leak out or fail to deliver pressure accurately. The seals and plunger inside a grease gun are not built for thin fluids.

Also, grease and oil behave very differently in machinery. You use oil where continuous flow and cooling are needed. You use grease where retention and long-term lubrication are required.

If your equipment calls for oil, you should use an oil can or oil gun, not a grease gun.

Q15. how to choose grease gun

You can start by thinking how often and where you’ll use the grease gun. An expensive grease gun doesn’t always necessarily mean that it will suit your needs.

If you only grease occasionally and want full control, go with a manual grease gun. A lever-style model gives higher output per stroke, but it needs two hands. A pistol-grip type is one-handed and easier in tight spots. These are great for small farms or occasional equipment greasing.

If you grease daily or handle many machines, choose a battery grease gun. It’s portable and provides power as well as it saves you from hand fatigue. A 12V or 18V grease gun with a flexible hose lets you reach awkward zerk fittings easily.

For environments with air lines, a pneumatic grease gun is efficient. It’s best for high-volume greasing but only works if you have compressed air on hand.

You should always check that the gun fits your grease cartridges and your grease gun fittings.

Look for accessories like locking couplers or meters if you need precise control. Most importantly, you need to make sure you know how much grease it delivers per stroke because it affects accuracy and consistency in lubrication.

Q16. how to find reliable grease gun suppliers

Finding a reliable grease gun supplier isn’t always about the price.

There are three main factors you need to consider first:

1. Quality
2. Durability
3. Supplier Support

If you go for a low-cost grease gun it could fail under pressure and automatically will cost more in downtime and replacements.

You can start by checking if the supplier is an authorized distributor for known grease gun manufacturers. It will help you distinguish that they are offering genuine products.

Warranty terms and after-sales support is the second important thing you need to ask from a supplier. Plus, you also need to check the specs like output per stroke and pressure rating.

You should go for the suppliers who stock all major types (manual, battery, pneumatic) as well as they have accessories like flexible hoses and locking couplers.

You can’t rely on listings alone. Read verified user reviews on technical forums or B2B marketplaces. Check for consistent feedback on product performance and customer service.

Finally, you can also test their responsiveness. Send an inquiry and see how quickly and knowledgeably they reply. That’s a reliable sign of how they’ll support you post-sale.

Q17. Top grease gun manufacturers and suppliers in the world

Lincoln Industrial

Lincoln Industrial was founded in in St. Louis, Missouri, USA. The firm introduced the first power‑driven grease gun in and later developed the Quicklub progressive system.

Now within SKF Group, Lincoln manufactures manual, pneumatic, hydraulic and cordless grease guns, pumps, reservoirs and controllers that service automotive plants, mobile equipment, mining, steel, pulp, food, rail and wind‑turbine lubrication worldwide.

Alemite

Alemite began in in New York, USA. It supplies high‑pressure fittings for truck axles. It released the landmark Model 525 lever‑action grease gun in .

Acquired also by SKF in , Alemite designs and builds heavy‑duty manual and battery grease guns, zerk fittings, hose reels and centralized systems. They are mostly used in automotive service, agriculture, aerospace ground support, food processing and general manufacturing.

Pressol

Pressol Schmiergeräte GmbH, founded in Germany, started with hand oilers and patented its first push‑type grease gun in . Operating from two Bavarian plants, Pressol now produces more than 2,500 lubrication and workshop products.

Its lever, pistol and pneumatic grease guns, filler pumps and metering valves support OEM and aftermarket customers in major industries all around the globe.

Bürkle GmbH

Bürkle GmbH was established in in Germany. It initially fabricated laboratory taps. Today this family‑owned company manufactures precision manual dispensers and manual grease guns for food and mining laboratories.

Bürkle grease guns feature chemically resistant housings and fine‑metering plungers for accurate micro‑lubrication during mechanical testing and pilot‑plant trials.

Assalub AB

Assalub AB started operations in in Sweden. They develop centralized lubrication pumps for forestry and paper mills. The firm offers manual lever grease guns as well as air‑operated guns with monitoring software.

Assalub equipment is installed on pulp digesters, sawmill conveyors, wind turbines and marine propulsion systems, where cold‑weather seals, stainless reservoirs and 400‑bar delivery pressures are critical.

ABNOX AG

ABNOX AG was founded in in Cham, Switzerland. The company is known for metering valves used by Swiss watchmakers. They now supply precision grease guns and dosing systems along with clamping technology.

ABNOX hand plus foot and motor‑driven guns deliver repeatable shot volumes down to 0.005 ml. Their main areas are electronics and medical‑device.

Milwaukee Tool

Milwaukee Electric Tool Corporation was established in in the USA. They introduced the M12 and M18 cordless grease guns in . These 8,000 psi tools feature REDLINK electronics with 2‑speed flow control and onboard purge valves.

They are deployed by heavy‑equipment dealers and steelworkers needing portable high‑output lubrication without compressed air hoses.

Ernst Hausammann & Co AG

Ernst Hausammann & Co AG was formed in in Switzerland. The company distributes over 100,000 industrial products. Under its EHRO brand, the company offers Swiss‑made lever, pistol and pneumatic grease guns, high‑pressure couplers and hose sets.

EHRO lubrication tools are used by railway workshops and precision‑machine builders in demanding alpine environments.

Groz Engineering Tools Pvt. Ltd.

Founded in in India, Groz Engineering Tools manufactures lubrication equipment in ISO facilities. Its catalog covers cast‑head lever guns and mini‑pistol guns, professional battery grease guns as well as the patent‑pending LeverPro high‑volume gun.

Groz exports its lubrication equipment to over 85 countries through private‑label programs and its own GROZ brand.

Egid Münch GmbH & Co. KG

Established in in Germany, Egid Münche fabricates lubrication fittings and grease guns under the MÜNCH brand. Their portfolio includes aluminum lever guns rated 700 bar and single‑hand side‑lever guns.

They also supply refillable cartridge systems. MÜNCH products support German machine‑tool builders and municipal vehicle workshops requiring DIN‑compliant, long‑life lubrication tools.

DEWALT

DEWALT began in in the USA, inventing the radial arm saw. Now it is a part of Stanley Black & Decker. The company markets the 20 V MAX cordless grease gun delivering 10,000 psi and 5 oz/min flow.

Their grease gun features an LED work light and filter screen. They mostly serve heavy‑equipment mechanics and agricultural users.

Sykes-Pickavant

Originated in in the UK, Sykes‑Pickavant commonly supplies pullers and valve tools. The company’s lubrication line includes lever guns, mini pistol guns, quick‑release couplers, digital flow meters and pneumatic grease boosters.

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Their products are distributed to British automotive garages, quarry plant operators and MOD workshops. They are valued for their UK‑based service and lifetime cast‑head warranties.

Facom

Facom, founded in France, with the famed “101” adjustable spanner, is now part of Stanley Black & Decker. Facom offers industrial lever, pistol and pneumatic grease guns rated up to 800 bar, plus color‑coded hoses and metric zerks.

French rail, aerospace, energy and motorsport sectors rely on Facom for EU‑certified as well as ergonomically designed lubrication gear.

Drögemeier Industriebedarf

Drögemeier Industriebedarf was created in in Germany. The company supplies MRO products to northern European factories. Its lubrication program features German‑made lever grease guns, hose reels, high‑flow couplers and grease monitoring tags.

Drögemeier kits are stocked by cement plants and food processors. Especially, those industries with a need for rapid delivery and technical advice on DIN  grease compatibility.

Plews & Edelmann

Founded in , Plews Manufacturing USA invented the “Lubrimatic” grease gun. After merging with Edelmann in , the company operates under Plews & Edelmann.

They offer lever guns, mini guns, cordless guns and the patented LeverLock coupler. Products serve North‑American automotive aftermarket and military depots through big‑box and professional distribution.

LockNLube

LockNLube LLC was founded in in the USA. They revolutionized greasing with its spring‑loaded zero‑leak coupler. The company now sells its own pistol and battery grease guns bundled with the LockNLube coupler and in‑line filters. Their products are favored by farmers and rental yards for the hands‑free connection.

Dieter Zedlitz Industriebedarf

Established in Germany, Dieter Zedlitz Industriebedarf GmbH distributes machine components to the Rhine‑Ruhr industrial corridor. It stocks lever guns up to 600 bar and pneumatic guns with ATEX certification. Local steel mills and chemical parks choose Zedlitz for rapid spares supply and on‑site hose crimping services.

Naugra Export

Naugra Export was started in in India. The company supplies civil engineering and vocational training equipment. Its lubrication range includes economy lever grease guns and  translucent mini guns used in technical institutes and small manufacturing workshops across Africa, Middle East and Latin America.

HYMA

HYMA was founded in in Zhengzhou, China. It engineers and manufactures industrial‑grade grease guns for mining, construction, trucking and plant‑maintenance fleets in more than 40 countries.

Its catalog covers manual hand‑press models and high‑pressure pneumatic units as well as smart electric guns that integrate with single‑, dual‑ and multi‑line central greasing systems. Each HYMA grease gun delivers precise metering and dependable field service backed by ISO‑certified production and 10,000‑hour durability tests.

Sealey

Sealey Power Products was founded in in the UK. They supply more than 12,000 workshop items. Its Grease Gun range covers side‑lever, mini pistol, cartridge, foot‑operated and air‑powered models plus Lock‑type couplers and digital meters. Independent garages, plant hire firms and motorsport teams value Sealey’s UK warehouse stock, exploded‑parts diagrams and next‑day service.

Beta Utensili

Beta Utensili S.p.A. was established in Italy. They manufacture professional hand tools. Beta’s series lever grease guns and air guns feature phosphated steel barrels and nitrile seals, certified up to 800 bar.

Italian automotive OEMs, shipyards and high‑speed rail depots specify Beta for rugged EU‑made lubrication equipment and orange safety handles.

USATCO (US Air Tool Co., Inc.)

Founded in in the USA, USATCO serves the aerospace industry with riveting and lubrication tools. Its aircraft‑grade lever and pistol grease guns accept Mil‑Spec cartridges and deliver precise shots for bearing swivel joints and engine accessories. FAA repair stations rely on USATCO for calibration, replacement couplers and PTFE‑lined hoses.

JOMA Tools

JOMA Kunststofftechnik & Werkzeuge GmbH was created in in Germany. The company originally molded precision parts. The company now produces manual hand grease guns and one‑hand clamps along with service kits for European machine builders. JOMA lever guns include integrated air‑bleed valves and screw‑on cartridges for clean filling during assembly‑line lubrication.

JLab Export

JLab Export has been operating since in India and providing workshop and automobile training equipment. The firm markets steel lever grease guns with high‑pressure couplers and color‑coded hoses used in vocational institutes and small agro‑equipment plants, with worldwide shipping and CE documentation.

KTC (Kyoto Tool Co., Ltd.)

Kyoto Tool was founded in in Japan, to supply precision wrenches for motorcycle factories. KTC now offers hand and battery grease guns, quick‑release couplers and metric fittings meeting JIS B . Japanese automotive OEMs, Shinkansen maintenance centers and robotics integrators choose KTC for lightweight alloy barrels and ergonomic handles.

LSP Industries, Inc.

LSP Industries, incorporated in the USA, initially produced air‑powered oilers. Its GREASESAFE program provides color‑coded lever guns, battery guns, labeling sleeves and OSHA‑compliant storage racks helping factories prevent lubricant cross‑contamination. LSP serves food, beverage, pharmaceutical and packaging plants requiring HACCP lubrication control.

Gray Tools

Gray Tools Canada Inc., established in Toronto, is Canada’s oldest hand‑tool manufacturer. Gray’s industrial grease guns include 3‑way‑fill lever guns and quick‑prime pistol guns rated 10,000 psi.

Canadian forestry and defense sectors count on Gray’s chrome‑plated barrels and bilingual technical documentation.

Holmatro

Founded in in the Netherlands, Holmatro Group is renowned for high‑pressure hydraulic rescue tools. Its Industrial Equipment division supplies two‑stage hydraulic grease guns and injectors delivering 700 bar for maintenance of offshore winches and heavy presses. Holmatro guns feature aluminum reservoirs and ATEX options.

SAM Outillage

SAM Outillage SA, established in France, produces professional tools for industry and automotive service. The SAM grease‑gun line comprises cast‑head lever guns and compressed‑air models with anti‑drip valves. French aerospace plants and nuclear sites specify SAM for robust, reparable lubrication equipment made in the Loire region.

Oil-Rite Corporation

Oil‑Rite Corporation began in in the USA. They initially manufacture constant‑level oilers. The company now engineers precision grease guns, refillable grease meters, visual flow indicators and centralized lubrication packages.

Oil‑Rite stainless and polysulfone guns allow contamination‑free food and pharmaceutical greasing. It features optional color‑coded reservoirs supporting lubricant identification programs under ISO  and NSF H1 standards.

Q18. What is the difference between grease gun and oil gun

You can differentiate between a grease gun or an oil gun based on three simple contrasts:

• Lubricant and body
• Delivery pressure
• Target component

A grease gun pushes a thick, butter‑like grease. You load a cartridge or bulk tube, prime a plunger, then pump 3 000‑15 000 psi through a rigid pipe or whip hose.

You use it when you need the lubricant to stay put like in hinge pins, bucket bushings, wheel‑bearing zerks, electric‑motor housings. The grease forms a seal against dirt and water and keeps working for weeks because it will not run off.

An oil gun (sometimes called a squirt‑oiler or precision oiler) meters a thin, free‑flowing oil at low pressure, typically under 150 psi. You fill its reservoir, squeeze a trigger or thumb pump, and the oil wicks across gears, chains or slideways.

You pick it when you want the fluid to flow, cool and flush, mostly likely in sewing‑machine shafts, chainsaw bars, high‑speed spindle bearings.

Oil would simply leak out of a grease point while grease would choke an oil port. Both tools are purpose-built based on viscosity, pressure, and application.

Q19. What is the benefit of grease gun

If you sell grease gun fittings, you probably already know that machines fail when grease misses its target.

There are four main benefits of grease gun:

• You grease the exact spot: The coupler locks to the zerk and the hose or rigid tube drives grease straight into the bearing, not onto the floor. No other hand tool threads grease through a 0.4 mm passage with 5 000‑10 000 psi behind it.
• You can meter every grease stroke: A manual lever gun delivers about 1 cc, a pistol model about 0.6 cc and most battery guns can be set in 0.1 cc increments. You can avoid the two killers of rotating equipment, starvation and over‑lubrication, while cutting grease spend by up to 30 %.
• You can reach the awkward points: A 450 mm flexible whip, a 90‑degree adapter or a needle nozzle lets you grease U‑joints, conveyor bearings, track pins or spindle noses without stripping guards or sliding under a truck. One tool covers quarry loaders, food conveyors and wind‑turbine yaw drives.
• You can keep grease clean and personnel safe: The sealed cartridge, check valve and dust cap stop grit entering the system, while your hands stay clear of pinch zones. Less contamination means longer bearing life and fewer call‑outs.

Some additional benefits are:

• Low entry cost
• Wide power options (manual, air, 18 V, 20 V)
• Multiple grease gun accessories

Q20. Why is it called a grease gun

You call it a “grease gun” for the same reasons you call a nailer a “nail gun.” The tool looks and works like a firearm, but instead of bullets you shoot grease. 

You load a cartridge or bulk tube into a barrel, cock a plunger or connect air/battery power, aim the nozzle at a zerk fitting and pull a trigger or lever. The action builds 3 000‑10 000 psi, propelling thick lubricant down a narrow bore just as gas pressure propels a projectile down a gun barrel. 

Early mechanics coined the term in the s because the first hand‑lever pumps had a pistol‑grip handle and a stubby barrel. The nickname stuck and even inspired the WWII‑era M3 Grease Gun sub‑machine gun. So the word “gun” simply reflects the tool’s cartridge loading, high‑pressure discharge and trigger‑style control, not any relation to firearms.

Q21. When to use a grease gun

You use a grease gun on parts that turn slowly under high load, hinge pins, U‑joints, wheel bearings, bucket pivots, conveyor rollers. The reason is that thin oil would run out. You grab it on a schedule.

For example, every engine‑oil change for autos, every 8–10 operating hours for loaders, or the interval printed on the machine’s lube chart. You also use it after washing equipment, after long storage, or whenever you hear squeaks that signal grease starvation. 

You choose it when the fitting sits deep inside a guard and the gun’s hose and coupler push grease exactly through the passageway. You can skip it on sealed bearings, high‑speed spindles, or gearboxes that specify oil because there, the grease will overheat and fail. 

You simply use a grease gun any time thick, stay‑put lubrication is required.

Q22. Where do you use a grease gun

You pull out a grease gun whenever a part is greased through a zerk‑style fitting and turns slowly under load. 

You use it on chassis joints, U‑joints, kingpins, fifth‑wheel plates, and wheel bearings on trucks. 

You reach for it on farm tractors to lube PTO shafts and steering knuckles. You rely on it in construction to service excavator boom pins and crane slewing rings. 

In plants you shoot grease into conveyor rollers and pillow‑block bearings as well as electric‑motor housings the minute vibration data or hours‑run logs say “service.” 

You also use it after every pressure wash, before seasonal storage, and any time a bearing has no oil bath but is tagged “lubricate with NLGI‑2 grease.” 

You use a grease gun anywhere thick grease must be injected accurately into a fitting you can’t reach with fingers or an oil can.

Q23. How to fill a grease gun

Here are the six short steps that will help you fill a grease gun:

Step 1. Pull the plunger

You point the gun nose‑up, press the air‑bleed button, and draw the T‑handle fully back until it locks in the slot.

Step 2. Unscrew the barrel

You hold the head in one hand and spin the steel barrel off with the other. Drop the empty cartridge in the scrap bin.

Step 3. Load the new cartridge

You snap off the plastic cap and slide that open end into the barrel first. Peel the foil seal from the exposed end.

Step 4. Re‑assemble loosely

You thread the barrel back onto the head until you feel resistance, then back it off one full turn. This leaves a gap for trapped air to escape.

Step 5. Release the plunger

You push the T‑handle straight in; the spring drives grease toward the outlet while purging air.

Step 6. Tighten and prime

You finish tightening the barrel. Pump the lever or trigger until a solid bead of grease appears at the nozzle. Wipe the tip, your gun is filled and ready.

Q24. What are the safety precautions for grease gun

You handle a grease gun because you want machines to last, not because you want a trip to the clinic. You should treat the tool like a mini‑pressure vessel and you stay safe.

Follow these checks every time:

• Wear the basics: You put on safety glasses with sturdy gloves and non‑skid shoes before you touch the trigger.
• Know the pressure: You read the gun’s maximum psi and be sure every hose and fitting is rated above it. You never improvise with garden hose or worn adapters.
• Keep hands clear: You never steady a coupler with your fingers near the zerk. The reason is that the high‑pressure grease can inject under skin and cause amputation‑level injuries.
• Bleed air safely: You purge air before pumping so the gun doesn’t spike or spit.
• Label the gun: You mark each gun with the grease type so you don’t cross‑contaminate bearings or mix incompatible thickeners that can fail parts.
• Maintain hoses: You inspect for kinks and cracks before every shift and replace at the first sign of wear.
• Store right: You release spring tension as well as wipe the nozzle clean and cap it to hang the gun horizontal in a clean, dry rack.
• Training: You grease only on locked‑out equipment, with good lighting, dry footing, and no curious bystanders.

Q25. How many psi for a grease gun

On grease guns, you will see some wild numbers like 2,000, 10,000, even 15,000 psi. However, a standard manual grease gun will generate about 2,000–7,000 psi, while heavy‑duty pneumatic or battery units can climb past 10,000 psi.

Q26. How to put new grease in a grease gun

Putting new grease in a grease is a rather simple task, once you know the sequence.
Here’s how you do it:

Step 1. You pull the plunger rod fully back and lock it so there’s no spring pressure.

Step 2. Now, you unscrew the barrel from the gun head and slide the spent tube out.

Step 3. You pop the plastic cap off the new cartridge and insert that end into the barrel first.

Step 4. You peel the metal seal from the exposed end of the cartridge.

Step 5. You thread the barrel onto the head until it is about two turns from tight, leaving a small gap to vent air.

Step 6. You release the plunger rod and push it all the way in.

Step 7. You finish tightening the barrel, then pump until grease appears at the coupler and the air is now purged. Wipe off any excess and store the gun upright.

Q27. How do you use a grease gun

To be able to use a grease gun, you only need to load and prime the gun.

You should follow the below steps every time:

Step 1. Wipe the fitting so you don’t inject grit.

Step 2. Now, you click the coupler straight onto the fitting until it seats.

Step 3. You have to pump the trigger or lever slowly, counting strokes specified by the equipment maker.

Step 4. Stop when you feel resistance or see fresh grease purge past the seal.

Step 5. You should angle the coupler, release pressure, and lift off without twisting the zerk.

Step 6. You need to wipe excess grease from the fitting and coupler to prevent dirt buildup.

Step 7. Mark the service log so you know when the point was last greased.

Step 8. Store the gun upright and nozzle capped as well as the rod released to reduce oil bleed.

Q28. How to tell if a grease gun is empty

You don’t need to crack the tube open or make a mess. There are just clues built into the gun.

When you pull the follower rod straight out, it slides easily until it hits the follower plate. The length that remains outside equals the grease left inside.

If the rod barely extends, you’re nearly empty. While pumping, feel the handle. When grease is gone you feel almost no back‑pressure and the strokes “slap” instead of push.

On automatic grease guns you also hear the motor speed up or pulse without resistance. You finally press the coupler on a rag and give one pump. If only air spits out, it’s time for a new cartridge.

Q29. Is a grease gun necessary for lubrication

You don’t need a grease gun to smear a little lubricant, but you do need one anywhere a machine is fitted with Zerk‑type grease nipples.

Those fittings are designed so you can’t force grease in by hand. You must generate 200–10 000 psi to push lubricant past the seal and along the bearing path.

Using the gun lets you meter exact shots, purge old grease and contaminants, reach recessed or shielded joints, and avoid the costly damage caused by over‑ or under‑lubrication. So, for some equipment, you use a grease gun as a standard tool for doing the job right.

Q30. How to buy grease gun from China

You start by short‑listing reputable grease gun manufacturers and suppliers. You can search major B2B platforms and filter for grease gun suppliers with verified business licences.

You can then requestISO  certificate as well as the capacity list.

Next, you can send a detailed RFQ that specifies output‑per‑stroke, burst pressure, thread type, logo requirements, and target annual volume. You can also ask for an F.O.B. unit price, the mould cost (if any) plus the lead‑time split into production and port‑handling days.

Then, you order the production samples and run your own leak‑, flow‑ and thread‑fit tests. You can approve if both samples pass.

You can then place a pilot order and choose a secure payment route like Trade Assurance, PayPal or letter of credit, so funds release only after shipment.

You can also book an independent inspector to check 10 percent of the batch before it leaves the factory. So, you can make a decision if defects exceed your limit. Finally, you arrange freight and clear customs at home, confident the tools match your spec.

Q31. What is the main origin manufacturing places of grease gun in China

You find most Chinese grease‑gun factories in the coastal manufacturing belt. Production is clustered where tool supply chains and export ports are close together.

The core hub is Zhejiang Province: Ningbo, Yuyao, Yongkang and Taizhou house scores of medium‑size plants that forge barrels and assemble couplers. Jiangsu Province follows, with Suzhou, Changzhou and Taizhou specializing in high‑volume cartridge and hose lines.

Shandong’s Linyi, Hebei’s Cangzhou and the Shanghai free‑trade zone add OEM capacity and logistics support, but Zhejiang and southern Jiangsu remain the primary origins.

Q32. what is the quality standard of grease gun

You want a grease gun that is safe to use and fit common grease gun fittings as well as the one that lasts. The quality of a gun is judged against published standards.

The baseline tests are in DIN / (dimensions and M10 × 1 or G 1⁄8 threads for cartridges and couplers) and ISO ‑2 (nozzle interchange).

Military and aerospace buyers add MIL‑G‑ and SAE AMS‑C‑ to confirm 14‑oz cartridge fit and burst resistance above 8 000 psi.

Asian makers often certify to JIS B  or KS B , which mirror DIN but add handle‑fatigue cycles.

Besides quality standards, you look for 10 000 psi burst proof, ≥1.2 cm³ per stroke accuracy and NLGI‑2 flow at 20 °C. Gun bodies should pass a 96‑hour salt‑spray per ASTM B117, seals must meet RoHS for elastomer safety, and assembled guns need CE / UKCA pressure‑equipment marking.

Q33. How to inspect quality of grease gun

You don’t need a lab to inspect the quality of a grease gun.

This is how you do it:

If you are looking for more details, kindly visit Yellow Work Light.