Milwaukee Grease Gun

Milwaukee Grease Gun

Milwaukee Grease Guns are reliable and versatile. They provide the necessary pressure to get grease exactly where you need it when you need it. Milwaukee’s lineup of grease guns is designed for all jobs, no matter the size.

Milwaukee offers several variations of cordless grease guns so you can easily use them around the garage. Some have two speeds, and others have one to meet the needs of all jobs, big and small. Milwaukee also provides necessary accessories to keep grease guns working correctly.

When you buy a grease gun from Milwaukee, you get a 5-year manufacturer’s warranty and the peace-of-mind that you purchased a tool from a company with over 80 years of history. In those decades of manufacturing tools, Milwaukee listens carefully to the needs of customers and has designed tools that keep customers coming back for more.

Why Buy Milwaukee Grease Guns?

When you are in the market for a grease gun, look no farther than Milwaukee Grease Guns. The single-speed guns are great for occasional use, while the two-speed grease guns are ideal for regular use.

From the professional mechanic to the hobbyist in his home garage, Milwaukee Grease Guns fill all the needs. The interchangeable battery, the extra accessories, and the quality manufacturing makes Milwaukee the best choice in the grease gun market.

Types of Milwaukee Grease Guns

Milwaukee Grease Guns come in their M12 and M18 lineups. The grease guns work with the powerful RedLithium batteries. One of the most popular options is the M12 Cordless Lithium-Ion Grease Gun. This compact bare tool has 8,000 PSI to deliver grease where it’s needed. If you need something bigger, the M18 2-Speed Grease Gun provides 10,000 PSI.

Milwaukee also offers accessories for grease guns. The couplers, hoses, and barrels are ready to work with heavy-duty jobs. Having some extra M18 Grease Gun 400g Clear Barrels on hand keeps you working without stopping to refill.

What to Consider When Choosing the Best Grease Gun

When searching for a grease gun, first learn about some of their most important features, including their power source, ease of use, ergonomics, propensity to leaking, loading options, and durability.


A grease gun’s pressure output is measured in pounds per square inch, or PSI. Pressure output can range from as low as 3,000 PSI to more than 10,000 PSI; make sure to use the correct pressure for each application. If the PSI is too low, the gun won’t apply enough grease to maintain large equipment, while a very high PSI could damage smaller mechanisms, such as air tools.

Ease of Use

When looking for a new grease gun, find a product with an efficient, easy-to-learn, and easy-to-use design.

  • Hand-lever grease guns are simple to use and control, making them a good option for those who have never used a grease gun. Reducing or increasing the grip on the lever adjusts the pressure and flow of the grease through the nozzle.
  • Pneumatic grease guns must be attached to an air compressor. This tether can make it harder to move around a crowded workshop or garage, but you can control the flow of grease with the finger trigger, not your hand.
  • Battery-powered grease guns aren’t tethered, and they operate with the same easy trigger control. However, these grease guns are usually heavier, and gauging the amount of grease may be more difficult. These devices may be best for individuals with significant experience.


The user’s hands hold, direct, lift, and control the area of application and flow of grease, so many users look for a product with an ergonomic design to make the gun comfortable to hold and operate. The design also can improve a user’s efficiency, allowing faster and more accurate control. Look for products manufactured with cushioned grips, lightweight materials, and multiple nozzle options to reduce hand fatigue.


Grease guns use pressure to push grease through a narrow nozzle. However, a grease gun with a low-quality or poorly designed plunger, head, or seal may leak. This not only creates a big mess, but it also reduces the pressure in the grease gun. To help prevent leaks, look for grease guns with durable metal barrels, hardened plungers, high-quality seals, and barrel heads with clean, tight-fitting threads.

Loading Options

Grease guns can have one of three different loading options: ibulking, suction, or cartridge.

  • Bulking is a simple, but messy and time-consuming method of filling a grease gun. Using a scoop, putty knife, or even their gloved hands, users manually pack grease into the gun barrel. This method is best for small, hand-lever grease guns with small barrels.
  • Suction uses the mechanics of the grease gun in reverse to fill the barrel. Remove the head of the barrel, place the open end of the barrel into a bucket of grease, and pull the grease up into the barrel by pulling back on the plunger rod to generate suction within the barrel.
  • Cartridges are the cleanest, easiest way to load a grease gun, though they are also the most expensive. Just remove the old cartridge from the barrel, put in a new one, and get to work.


Look for a product that incorporates a high degree of durability into an ergonomic, easy-to-use design. Manufacturers also try to guard against leaks with hardened plungers that resist warping and air bleeder valves to release built-up pressure safely.

Our Top Picks:

1. Milwaukee 2646-20 M18 18V Lithium-Ion 2-Speed Cordless Grease Gun

Milwaukee 2646-20 M18 18V Lithium-Ion 2-Speed Cordless Grease Gun

The Milwaukee 2646-20 M18 2-Speed Grease Gun eliminates cramps and stress injuries associated with hand-powered grease pumps. The 2 Speed modes allow users to achieve a maximum flow rate of 10 oz. per minute (high flow mode) or up to 10000 PSI (high pressure mode) ensure slow machine and equipment greasing jobs are a thing of the past.

With a pre-set grease counter, users can select the amount of grease for their application, then use the lock-on trigger to automatically complete the job. A flexible 48 in. long hose and built-in LED light help users access hard to find fittings. The barrel accommodates either bulk grease or sealed cartridges, and the air bleeder valve makes quick work of priming before greasing.


  • Maximum operating pressure of 10000 PSI on high-pressure mode
  • Maximum flow rate of 10 oz. per minute on high-flow mode
  • Grease counter dial automatically cuts grease flow when set amount is reached
  • Access hard-to-reach fittings with 48 in. flexible hose
  • Air bleeder valve allows for quick priming
  • Lock-on trigger allows for hands-free greasing
  • Accomodates sealed cartridges or bulk grease
  • Onboard LED light illuminates hard to see fittings

2. Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun

Milwaukee 2446-20 M12 12V Cordless Lithium-Ion Grease Gun

Get up to 25% more pressure, best-in-class runtime, and compatibility with tools for drilling, fastening, lighting and cutting. The M12 Cordless Lithium-Ion Grease Gun delivers the highest max operating pressure in its class to help you handle heavy-duty applications and eliminate downtime. It’s capable of delivering more than 8,000 PSI max operating pressure for heavy machinery, cold weather applications and clogged grease fittings.

The M12 REDLITHIUM Battery (sold separately) lets you dispense up to seven grease cartridges per charge and is compatible with a variety of Milwaukee tools for greater workplace versatility. A lightweight, ergonomic handle offers greater comfort during prolonged use, and an onboard hose storage and shoulder strap loop offer convenience with less mess. The gun comes with a 36 in. flex hose with spring guard and grease coupler.


  • Best-in-class runtime: Dispenses up to 7 cartridges per charge
  • Powerful 12V motor: Delivers more than 8,000 PSI max operating pressure
  • Onboard fuel gauge: Helps you increase productivity and avoid interruptions
  • M12 Lithium-Ion system: Compatible with more than 20 tools for greater
  • Versatility
  • REDLITHIUM Battery Technology: Superior pack construction, electronics, and performance deliver more work per charge and more work over pack life than any battery on the market
  • Integrated hose storage: Adds convenience
  • Air bleeder valve: Priming mechanism provides quick flow


What are grease guns used for?

Grease guns are used to lubricate a wide variety of parts on a vehicle’s chassis and running gear. Prior to the 1980s, “chassis lubrication” was a standard part of most automotive service visits, but as more components like bushings, kingpins and bearings became sealed-for-life, less attention needed to be paid. Grease guns are used to inject components such as wheel bearings, universal joints, steering joints and more, with the lubricants needed to keep them moving freely and prevent parts from wearing out.

What is the best grease for cars?

While there are so-called “general purpose” greases on the market some parts, like wheel bearings, require specific types of grease that don’t interchange with general-use grease. Owners should always refer to the factory manual to determine the appropriate grease for their application.

Can grease guns be used with any type of lubricant?

Grease guns are designed specifically to be used with heavy lubricants that don’t flow unless forced under pressure.

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