Best High Pressure Grease Gun (2026)

Compare the picks

20 October 2026

How we scored them

Each grease gun is scored on performance, build, value, safety and warranty, with the weights published on our How We Pick page. A spec the listing does not publish scores nothing.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

What the listings tell you

Pressure is the headline and the spread is wide. The DIYtoolifz states 12,000 PSI from a brushless motor with a 3-speed dial: 5 oz/min on Low, 7 oz/min on Medium and 9 oz/min on High. The Seesii states 8,000 PSI in a pistol-grip manual. The Alemite states 7,500 psi with a dual leverage feature that switches between volume and pressure modes. The Lincoln states 6,000 PSI from a fully automatic pneumatic with a variable speed trigger and continuous operation. No other pick states a flow rate, so the DIYtoolifz’s 9 oz/min maximum stands alone.

Hose length decides reach. The Lincoln states a 30-inch high-pressure hose with coupler, the longest here, plus a combination filler coupler and air bleeder valve. The DIYtoolifz states a 39.4-inch flexible hose, actually the longest, with 4 couplers (90-degree, Lock-On, pointed tip and standard), an extension pipe and wrenches. The Alemite states an 18-inch flexible hose with a durable coupler and bleeder valve. The Seesii states a 12-inch flexible hose with a rigid pipe, a 90-degree adapter and a 3-in-1 coupler set (quick-release, universal and pointed).

Loading and power split three ways. The Lincoln and DIYtoolifz both take cartridges or bulk fill: the Lincoln states both with its combination filler coupler, and the DIYtoolifz states a 2-in-1 design for standard 14 oz cartridges or bulk grease. The Seesii takes 14 oz cartridges, bulk grease or suction filling, and handles greases up to NLGI #2. The Alemite states a quick priming system with a heavy-duty follower spring and universal follower. Power: the Lincoln is pneumatic, the Alemite and Seesii are manual, and the DIYtoolifz is cordless on DeWalt 20V batteries (tool only, battery and charger not included).

How to pick the best high pressure grease gun

Start with the fittings. For stubborn, clogged fittings on heavy equipment, the listings point to the highest PSI: the DIYtoolifz at 12,000 and the Seesii at 8,000 both name clogged fittings in their stated uses. For routine maintenance the Alemite’s dual leverage volume mode and the Lincoln’s continuous pneumatic operation are the stated efficiency picks.

Then match power to your shop. The Lincoln needs an air compressor, which the listing assumes you have. The DIYtoolifz needs DeWalt 20V batteries you already own, and the listing recommends a 4.0Ah or higher capacity battery. The manual picks need nothing but grease: the Seesii’s pistol grip and the Alemite’s cast handle are the stated comfort features for long sessions.

Check the kit against the job. The DIYtoolifz includes 4 couplers, an extension pipe, wrenches, a shoulder strap and a blow-molded case with an LED work light and quick-purge valve on the tool. The Seesii includes 4 nozzles, hose, rigid pipe, 3 couplers and the 90-degree adapter with a storage clip for the coupler. The Alemite and Lincoln are the tools with hoses and couplers, no extra kit. See the full cordless tools range for battery-platform options.

Garage Fit Check

• Match the gun to the air supply or battery platform: pneumatic needs a compressor, the cordless needs DeWalt 20V batteries
• Use the stated pressures as the guide: 6,000 to 12,000 PSI across the group, with the 3-speed dial on the cordless for delicate fittings
• Purge air before starting: the Lincoln and Alemite state bleeder valves, the DIYtoolifz a quick-purge valve
• Wear gloves and eye protection around high-pressure grease: a burst fitting throws grease, and the DIYtoolifz states a burst-proof hose
• Store the coupler clipped: the Seesii states a built-in nozzle clip that keeps the tool mess-free

PSI: matching pressure to the fitting

What each listing states

Stated maximums: the DIYtoolifz at 12,000 PSI, the Seesii at 8,000 PSI, the Alemite at 7,500 psi and the Lincoln at 6,000 PSI. Both the DIYtoolifz and the Seesii name clogged or stubborn fittings in their listings; the Alemite states its pressure for industrial applications; the Lincoln states its 6,000 PSI for high-pressure applications like CV joints, bearings and zerk fittings. For clearing a dried-out fitting, the DIYtoolifz states the most headroom; for routine lubrication, the Lincoln’s stated 6,000 PSI with continuous operation covers the job.

Flow control on the cordless

The DIYtoolifz states a 3-speed dial: Low at 5 oz/min for precision work, Medium at 7 oz/min for routine maintenance, and High at 9 oz/min for clogged fittings. None of the other three states a flow figure. The manual pair state leverage instead: the Alemite’s dual leverage feature switches between volume and pressure modes, and the Seesii states smooth lever action with an ergonomic pistol grip.

Power source tradeoffs

Pneumatic, cordless and manual

The Lincoln is pneumatic: fully automatic with continuous operation and a variable speed trigger, at a stated 5.6 lb with a 30-inch high-pressure hose. It needs a compressor. The DIYtoolifz is cordless and brushless, compatible with DeWalt 20V batteries (not included, tool only), at a stated 11.58 lb with a 39.4-inch steel-braided hose. The Alemite and Seesii are manual: the Alemite at a stated ergonomic cast handle with quick priming, the Seesii at a stated 3.4 lb with a 12-inch flexible hose, rigid pipe and 4 nozzles. For a shop with a compressor, the Lincoln’s stated continuous operation wins; for field work, the DIYtoolifz needs only batteries you own.

What comes in the box

The DIYtoolifz states the fullest kit: gun, 39.4-inch hose, 4 pro couplers (90 degree, Lock-On, pointed tip, standard), extension pipe, wrenches, shoulder strap and a blow-molded case, plus an LED work light and non-slip kickstand. The Seesii states gun, 12-inch hose, rigid pipe, 3 couplers, 90-degree adapter and manual. The Lincoln states the 30-inch hose with coupler, combination filler coupler and air bleeder valve. The Alemite states an 18-inch flexible hose, durable coupler and bleeder valve. The DIYtoolifz’s stated quick-purge valve and the Alemite’s stated quick priming system with heavy-duty follower spring both address airlocks.

Frequently Asked Questions

How does a grease gun work?

The listings describe the mechanism: the gun pressurizes grease and pushes it through a hose and coupler into the fitting. The Alemite adds a dual leverage feature for volume or pressure modes, and the Lincoln runs fully automatic with continuous operation.

How do you load a grease gun?

The listings state three methods: 14 oz cartridges, bulk fill and, on the Seesii, suction filling. The Lincoln states a combination filler coupler, and the DIYtoolifz states a 2-in-1 cartridge and bulk design. The Seesii states it handles greases up to NLGI #2.

How do you fix a grease gun that will not prime?

The listings state the anti-airlock features: the Alemite has a quick priming system with a heavy-duty follower spring, the Lincoln and Alemite have air bleeder valves, and the DIYtoolifz has a quick-purge valve that the listing says eliminates airlocks for instant start-up.

What PSI do I need for clogged fittings?

The listings state 12,000 PSI on the DIYtoolifz and 8,000 PSI on the Seesii, both of which name clogged or stubborn fittings. The Alemite states 7,500 psi and the Lincoln 6,000 PSI for high-pressure applications like CV joints and bearings.

Are cordless grease guns as strong as pneumatic ones?

On the stated figures, the cordless DIYtoolifz at 12,000 PSI doubles the pneumatic Lincoln at 6,000 PSI. The cordless needs DeWalt 20V batteries (not included); the pneumatic needs a compressor.

Related: our air compressor maintenance, air compressor types and the air impact wrench vs air ratchet comparison.