Milwaukee M18 Grease Guns Compared: Which One Fits Your Battery and Your Jobs

Best for
Professional mechanics with existing M18 batteries

The Milwaukee 2646-20 M18 2-speed Grease Gun is the flagship bare tool designed for trade professionals, heavy equipment mechanics, and agricultural operators who already own M18 batteries. Built with a metal barrel and high-grade internal gearing, this 10,000 PSI cordless grease gun produces immense force to push fresh lubricant past clogged or gummed-up fittings. Its two-speed motor allows users to toggle between maximum operating pressure for stubborn pins and high flow rate for quickly packing large bearing housings.

Precision control is where this authentic Milwaukee 2646-20 M18 2-speed grease gun sets itself apart from standard utility equipment. A patent-pending pre-set grease counter dial lets technicians dial in exact grease quantities, preventing blown bearing seals caused by over-lubrication. The unit also features an integrated air bleeder valve that releases trapped air pockets for immediate priming after cartridge changes, alongside a marked plunger rod that allows operators to gauge remaining grease levels at a glance. An on-board LED light illuminates dark suspension components, while a lock-on and lock-off trigger supports continuous flow during major greasing routines.

Ergonomics and reach are central to this model’s utility. Weighing 9 pounds as a bare tool, it features a stable stand-up base design that stays upright on shop floors or machine frames when setting up connections. The generous 48-inch flexible hose provides superior reach when working deep inside tractor linkages, making it easier to maneuver than competing units with shorter lines. This bare tool configuration suits existing Milwaukee tool owners perfectly, though users without batteries will need to source a power pack separately or consider the complete factory kit.

• Industry leading 10,000 PSI maximum operating pressure
• Generous 48-inch flexible hose for reaching tucked-away grease fittings
• Patent-pending pre-set grease counter dial for precise shot metering
• Air bleeder valve for quick priming during cartridge swaps

Best for
Shoppers needing an all-in-one factory battery kit

For buyers who do not already own an inventory of red lithium batteries, the Milwaukee M18 Cordless 2-Speed Grease Gun kit delivers a complete, turnkey lubrication setup directly from the factory manufacturer. Rather than sourcing batteries, chargers, and grease guns separately, this packaged configuration supplies the primary tool alongside two dedicated rechargeable batteries. This ensures uninterrupted operation on remote job sites, allowing operators to keep one battery charging while the other powers through daily machinery maintenance.

This three-piece kit features robust construction utilizing stainless steel components alongside high-impact composite housings finished in Milwaukee’s signature black, red, and silver styling. The tool shares the proven two-speed motor architecture of the authentic M18 platform, balancing high-pressure delivery against steady volumetric flow. Having two batteries included is particularly valuable for service trucks and farm utility vehicles that operate far from shop charging bays during intensive spring planting or autumn harvesting cycles.

At an overall package weight of 13.47 pounds, this setup is built for industrial endurance. While technicians heavily invested in other cordless systems might explore options like a grease gun dewalt 20v setup, staying within the authentic M18 ecosystem provides seamless cross-compatibility with hundreds of workshop tools. This complete package eliminates compatibility guesswork and provides a ready-to-work solution for fleet garages, independent mechanics, and farm operations requiring immediate, reliable grease deployment.

• Complete three-piece cordless setup including grease gun and two rechargeable batteries
• Durable stainless steel construction finished in black, red, and silver
• Two-speed motor engineering designed for regular agricultural and shop maintenance

Best for
Heavy equipment owners using bulk grease

The Ecarke Cordless Grease Gun Compatible offers an adaptable alternative designed to run directly on standard Milwaukee 18V lithium-ion batteries, including battery models such as 48-11-1815, 48-11-1820, and 48-11-1822. Sold as a bare tool without a battery or charger, this unit provides an accessible entry point for M18 owners who want electric lubrication without purchasing genuine OEM hardware. The tool is engineered for heavy-duty tasks on automotive chassis, trucks, and farm equipment, delivering up to 12,000 PSI of maximum pressure.

Unlike standard two-speed models, this unit incorporates a three-speed adjustable flow control mechanism. Operators can select between 5.3, 7.0, and 8.8 ounces per minute, allowing tailored grease delivery whether performing delicate bearing work or rapidly filling massive excavator pivot joints. The mechanical assembly features a reinforced steel barrel and a sturdy T-handle plunger that supports dual-loading capabilities, accepting standard 14-ounce grease cartridges as well as direct bulk or drum suction loading.

Convenience in the field is bolstered by an extensive accessory package. The Ecarke model includes a 39-inch flexible hose, an ergonomic shoulder strap, and a trigger lock for hands-free continuous pumping. Furthermore, it arrives packed in a durable hard plastic carrying case containing four dedicated couplers: a 90-degree coupler for cramped quarters, a lock-on coupler for hands-free leak prevention, a pointed tip coupler for flush fittings, and a standard hydraulic coupler. Weighing 11.62 pounds in its kit form, it represents a versatile multi-attachment setup for farm and industrial maintenance.

• Three selectable flow speeds delivering 5.3, 7.0, or 8.8 ounces per minute
• Delivers up to 12,000 PSI maximum pressure for clearing clogged grease fittings
• Dual-loading design supporting standard 14-ounce cartridges and bulk drum loading
• Comprehensive accessory bundle with four specialized couplers and hard storage case

The SUROVO Cordless Grease Gun Compatible with Milwaukee is an innovative bare-tool alternative built around maximum user comfort and adaptable physical positioning. Designed to click seamlessly into a wide spectrum of Milwaukee 18V battery packs—ranging from compact 48-11-1820 batteries up to high-capacity 48-11-1862 packs—this motorized unit replaces tiring manual lever pumps. It delivers up to 12,000 PSI maximum pressure and an output volume of 6 to 8 ounces per minute, generating ample force to overcome seized, dirt-caked zerk fittings.

A standout feature of this tool is its patented 2-in-1 rotating handle assembly. Operators can instantly twist the grip between a compact pistol configuration for confined machine pockets and a straight alignment for extended linear reach. Working in dimly lit chassis areas is simplified by an integrated LED work light mounted on the housing. The motor is controlled via a sensitive variable speed trigger paired with a lock-on button, allowing users to modulate lubricant delivery with slight finger pressure or lock the flow open for lengthy servicing routines.

Flexibility extends directly to lubricant handling. The reinforced steel barrel accommodates standard 14-ounce cartridges as well as 600 cc bulk or drum grease, working smoothly with NLGI number 0, 1, and 2 grease grades. The complete package weighs 10.28 pounds and includes an organized hard shell storage case, a 39.4-inch flexible hose, an extension pipe, a 90-degree swivel coupler, a lock-on coupler, and multiple standard and quick-release couplers. This extensive outfitting makes it an exceptional problem-solving tool for fleet service bays encountering diverse machinery.

• Two-in-one rotating handle that transitions between pistol grip and straight alignment
• Maximum 12,000 PSI pressure rating with variable speed motor output up to 8 ounces per minute
• Dual-loading steel barrel compatible with 14-ounce cartridges or 600 cc bulk grease
• Included 39.4-inch flexible hose, extension pipe, multi-piece coupler set, and carry case