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If you’ve ever balanced on a tractor fender, hand-pumping a manual grease gun until your forearm aches, you know the real problem: a stubborn zerk fitting that won’t take grease. An electric grease gun fixes that by doing the squeezing for you—just pull the trigger and it pushes grease through dirty fittings without the hand fatigue. The trade-offs come down to pressure, runtime, and hose reach, and the picks below cover farm, shop, and home use.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
An electric grease gun saves your hands and cuts lube time dramatically, but the best model for you depends on PSI, battery life, and hose length, so here are the ones worth your money.
Our Picks at a Glance
How To Choose The Best Electric Grease Gun
Electric grease guns look similar at a glance, but the specs that differ most are the ones that decide whether you finish a job comfortably or fight the tool the whole way. You want to match the gun to the biggest machine you service, not the most impressive number on the box.
Pressure and Flow Rate
Max PSI is the headline number, usually 10,000, and it matters most when you are clearing a clogged or dirty fitting that a hand pump simply cannot push through. Flow rate, measured in ounces per minute, tells you how fast the grease moves once the fitting is clear. Higher flow saves time on big jobs, but it can blow a boot off a ball joint if you are not careful, so a variable trigger or a 2-speed option gives you control.
Battery and Runtime
Battery-powered cordless models free you from the outlet, and runtime is measured in cartridges per charge. If you service a whole fleet of tractors or heavy equipment, you want a gun that goes through several tubes before it needs a charge, plus a second battery for long days.
Hose Length and Ergonomics
A longer hose, like 42 or 48 inches, means you can reach fittings tucked behind frames or under decks without moving the whole gun and fighting the weight. Weight matters too, since a heavy gun at arm’s length gets tiring fast on overhead fittings, so look for a balance between power and how long you can hold it up.
Quick Comparison
| Model | Best For | Max PSI | Hose Length | Weight | Amazon |
|---|---|---|---|---|---|
| DEWALT 20V MAX DCGG571M1★ Best Overall | High-volume farm and shop use | 10,000 | 42″ | 14.8 lb | Amazon |
| TaskStar Electric Grease GunBest Value | Arthritis-friendly daily greasing | 10,000 | 40″ | 6.16 lb | Amazon |
| CRAFTSMAN V20 CMCGG001BTop Performer | Clogged fittings on backhoes | 10,000 | 40″ | 8.88 lb | Amazon |
| Milwaukee M18 2646-20 | Precision PM tasks with counter | 10,000 | 48″ | 9.33 lb | Amazon |
| Milwaukee M12 2446-21XC | Compact reach in tight spaces | 8,000 | 36″ | 7.2 lb | Amazon |
| Milwaukee M18 2646-22CT | Two batteries for long jobs | 10,000 | — | 16.02 lb | Amazon |
| Lincoln 1882 PowerLuber | Fleet and industrial reliability | 10,000 | 36″ | 12.4 lb | Amazon |
In‑Depth Reviews
1. DEWALT Grease Gun Kit 20V MAX (DCGG571M1)
Our pick — over 4.5★ from 6,500+ verified ratings; the strongest balance of quality and price.
The crowd favorite that powers through a whole day of farm fittings on one charge
Owners call this DEWALT the hand-saver that finally retires the manual pump., and the numbers back that up: a motor pushing up to 10,000 max PSI (pounds per square inch, the pressure that clears clogged fittings) and a high-volume pump that flows at up to 5.0 oz/min (ounces per minute, how fast grease moves once the fitting is open). The variable speed trigger lets you ease off so you don’t blast a boot clean off a ball joint—buyers warn about that with a laugh.
Battery life is the real headline here, with up to 16 cartridges per charge on the included 4.0Ah 20V MAX battery, so a day on the tractor or backhoe rarely means stopping to swap packs. The 42-inch flexible hose reaches fittings tucked behind frames, and the built-in LED light finds the ones hiding in the shadows. That 14.8-pound kit weight is the trade-off for all that runtime and power, though the shoulder strap and kit box help you carry it.
An air-bleeder valve (a small vent that releases trapped air) makes priming quick after a cartridge swap, and the pump filter screen keeps dirt from clogging the mechanism. As owners put it: “GO Easy. You will blow the boot right off a ball joint.” The 3 year limited warranty adds confidence on a tool you’ll use hard.
What wins people over
- 16 cartridges per charge keeps you working all day
- 10,000 PSI busts through clogged fittings easily
- Variable speed trigger adds control for delicate seals
- Integrated no-mar foot lets you rest it flat
Who should think twice
- 14.8 lb kit is heavy for overhead work
- Overkill for a single small mower or car
Reach for this if: you service tractors, backhoes, or any equipment where hand-pumping is a real chore and you want all-day battery life.
Look elsewhere if: your only job is one lawn mower spindle, where this much power is simply more than you need.
2. TaskStar Electric Grease Gun
The arthritis-friendly pick that makes a full day of greasing feel pain-free
For anyone with aching hands, the TaskStar is the tool that changes the job: buyers with rheumatoid arthritis report it turns greasing haying equipment into a pain-free task they wish they had bought years ago. The lock-on trigger locks the flow so you do not hold the switch down across a row of fittings, which is the feature that ends hand fatigue on big jobs.
It delivers up to 10,000 PSI at a flow rate of 5 oz/min, and at 6.16 pounds it is far lighter than the 14.8-pound DEWALT kit—a 2.4x gap that matters when you carry it around a barn or job site. The included shoulder strap and ergonomic grip make it comfortable to move between tractors, and the two rechargeable batteries mean one full charge can grease up to 10 tractors without stopping.
What wins people over is the easy ease of use — simply pull and let the motor do the work. The honest caveat is durability, which gets mixed feedback; an occasional unit arrives with a broken grip or fails on first use. Keep the box for warranty purposes and treat the handle gently and this is an outstanding entry into cordless greasing.
The big wins
- 5.6 lb body with shoulder strap is easy to carry
- Lock-on trigger prevents hand fatigue
- Two batteries give long runtime across a fleet
- Handles thick grease without bogging down
The honest limits
- Durability is mixed, with some reports of breakage
- 40″ hose is shorter than some pro models
Best for: farmers, ranchers, and DIYers with arthritis or weak grip who need an affordable, lightweight greaser for daily equipment maintenance.
Not ideal for: pros who run a gun hard every single day and need maximum durability over low price.
3. CRAFTSMAN Grease Gun V20 (CMCGG001B)
The 2-speed workhorse that blasts through the hardest-to-inject zerk fittings
When a backhoe’s grease zerks resist hand pumping due to the pressures involved, this CRAFTSMAN is the answer owners reach for. It pushes up to 10,000 max PSI and flows up to 9 oz. of grease per minute, which is the highest flow rate in this lineup, so it clears stubborn fittings fast. The two speed transmission lets you drop to a gentler pace for precision work.
Part of the V20 system, it runs on Craftsman batteries you may already own, which is a huge plus if you are invested in that platform. The 40″ hose and variable speed trigger give you control and reach, while the built-in LED lights up dark work areas. At 8.88 pounds it is a middleweight, noticeably heavier than the TaskStar’s 6.16 pounds, but lighter than the 14.8-pound DEWALT kit.
Functionality is the thing everyone raves about — there is a “simple pressure valve operation” that makes it much easier than a manual gun. The recurring gripe is grease-loading, which gets mixed feedback, and buyers do wish it came with a case and more batteries. Swapping the tip for a locking coupler is the common upgrade, since the stock tip is the weak link for some.
The standout strengths
- 9 oz/min flow clears fittings faster than rivals
- Two speed transmission tune for each job
- Runs on the Craftsman V20 battery system
- 40″ hose reaches difficult spots
The trade-offs
- Grease loading gets mixed owner feedback
- Tool only, so no battery or case included
Choose it if: you already own Craftsman V20 batteries and need a fast-flowing gun for tractors and backhoes.
skip it if: you want a battery and charger in the box, since this one is tool-only.
4. Milwaukee M18 Cordless 2-Speed Grease Gun (2646-20)
The precision pick with a pre-set grease counter dial for perfect PM doses
This is the grease gun for shops that want control over exactly how much grease hits each fitting. Its pre-set grease counter dial lets you set a dose from 1 to 50 with auto-stop or continuous flow, which makes preventive maintenance jobs repeatable and waste-free. Owners on tandem axle trailers love it for Dexter hubs because precise amounts prevent over-greasing.
It runs on the M18 system, compatible with over 40 M18 Lithium-Ion solutions, and delivers up to 10,000 PSI max operating pressure with a max flow-rate of up to 10 oz./minute. The 48″ flexible hose with spring guard gives you 20% more reach than the TaskStar’s 40″ hose, which matters when you are stretching toward a fitting on a big rig. The lock-on/lock-off trigger adds convenience for continuous greasing.
What wins people over is quality—owners call it the easiest gun to prime and say it is “hands down the best grease gun sold.” The trade-offs are the heavy 9.33-pound weight and a hard tube change due to the spring, which buyers report to brace for. This is a tool-only kit, so you need an M18 battery and charger already.
The pro advantages
- Pre-set counter dial doses from 1-50 pumps
- 48″ hose reaches further than most rivals
- 10 oz/min max flow for fast big jobs
- Lock-on trigger for continuous flow
The drawbacks
- Heavy at 9.33 lb for overhead use
- Tube change is stiff due to the spring
Pick this for: maintenance pros doing PM work who need exact grease doses and already run the M18 battery platform.
Think twice if: you are not in the Milwaukee ecosystem and do not want to buy into a new battery system.
5. Milwaukee M12 Cordless Grease Gun (2446-21XC)
The compact M12 that cuts rig greasing time in half with a 7.2-pound body
Sometimes the job is tight and the big M18 guns are just too much bulk to maneuver. This M12 model is only 14 inches long and 7.2 pounds, making it the nimble choice for reaching fittings in cramped spots. Its powerful 12-volt motor still delivers over 8,000 PSI max operating pressure, and owners mention it cut their rig greasing time in half.
Runtime is the standout for a small gun, dispensing up to seven cartridges per charge on the included M12 XC battery pack. The integrated hose storage and LED fuel gauge add convenience, while the 36″ flex hose reaches what you need without the bulk of a bigger gun. The included 30-minute charger gets you back to work quickly.
What wins people over is grease delivery on a compact frame — owners greased a 12-fitting Kubota in about 10 minutes. Battery life gets mixed feedback, so a second M12 battery is worth grabbing for long days. A locking coupler like the Lock N Lube is the recommended upgrade to keep the tip on the fitting hands-free.
The compact perks
- 7.2 lb and 14″ long, ideal for tight spaces
- 7 cartridges per charge is strong runtime
- 8,000 PSI handles most equipment
- Integrated hose storage keeps it tidy
The limits
- Lower PSI than the 10,000 M18 models
- Battery life gets mixed reviews from heavy users
Best for: anyone working in tight bays or on smaller equipment who wants an easy-to-handle gun that still does real work.
Not for: those servicing heavy machinery all day who need the higher pressure and longer hose of the M18 platform.
6. Milwaukee 2646-22CT M18 2-Spd Grease Gun Kit
The two-battery M18 workhorse that switches grease output settings on the fly
This is the grease gun for owners who service a lot of fittings and want the security of a second battery in the kit. It delivers the M18 platform’s 10,000 PSI through a 2-speed transmission, and owners love that you can switch the settings to control how much grease comes out. It works perfectly on a Massey Ferguson tractor and zero-turn mowers alike.
The 16.02-pound kit weight is the heaviest here, but that is the price of two compact batteries and the rugged metal build. Customers note using it on hundreds of fittings across cranes, excavators, and barges, saving their hands versus manual guns. It is highly durable — for those who get a good unit, It is a tool they have bought three times over.
The thing everyone raves about is the adjustable grease output, which is unlike any other gun they have seen. The biggest recurring complaints are battery charging issues and units dying after about six months, plus a notable 40 negative mentions about the case not being the hard case advertised. Buyers recommend verifying the case and charging right away.
The workhorse wins
- Two compact batteries for long jobs
- Adjustable grease output settings
- Handles cranes, excavators, and barges
- Highly durable metal construction
The frustrations
- Battery charging issues reported by some
- Case is not the hard case advertised
- Heaviest kit in this lineup at 16.02 lb
Best for: heavy-duty users with hundreds of fittings to grease who want adjustable output and a spare battery.
Check carefully: verify the case and both batteries charge immediately since some units arrive with charging problems.
7. Lincoln 1882 PowerLuber 20V Grease Gun
The industrial legend built with a hardened steel piston for years of fleet service
Lincoln is the name professionals trust when a grease gun has to last, and the 1882 PowerLuber backs that up with a hardened steel piston, radiused low-friction metal gearing, and a high-torque motor. It delivers up to 10,000 PSI at 2 speeds, easily busting through dirty fittings while reducing wasted grease. Reviewers point out previous Lincoln models surviving thousands of fittings without failure.
Battery life is a standout — shoppers say three days of daily use on a charge and over five tubes of grease per charge. The built-in vent valve purges trapped air for easy priming, and the 3-point base with built-in LED light reduces fatigue and illuminates the work. The included 36″ high pressure hose, 20V battery pack, and 120v charger make it a complete kit, backed by a 5 year tool and 2 year battery warranty.
The thing everyone raves about is the quality — owners call Lincoln “the brand to buy” and note it works flawlessly through 50 fittings with no issues. The honest trade-off is weight and bulk at 12.4 pounds, which is heavy for overhead use, and the grease output gets mixed feedback, with some noting it can blow seals if you are not careful. A smaller Milwaukee M18 is better for light equipment.
The industrial strengths
- Hardened steel piston and metal gearing last for years
- 5 year tool and 2 year battery warranty
- Long battery life, up to 3 days of daily use
- Busts through dirty fittings at 10,000 PSI
The trade-offs
- 12.4 lb weight is bulky for overhead work
- Grease output can blow seals if misused
Reach for it if: you need an industrial-grade gun for light and heavy-duty vehicles, farm equipment, or manufacturing plants and want a long warranty.
Look elsewhere if: most of your work is on small equipment overhead, where the bulk and power are more than you need.
Understanding the Specs
Max PSI and Flow Rate
Max PSI (pounds per square inch) is the pressure the motor can generate, and 10,000 is the industry standard for electric guns. It matters most when you’re pushing grease into a clogged or dirty fitting that a manual pump can’t handle. Flow rate, in ounces per minute, tells you how fast grease moves once the fitting is open—a higher number like 9 or 10 oz/min saves time on big jobs but can blow a seal if you’re not gentle.
Battery Runtime and Cartridges
Battery-powered guns measure runtime in cartridges per charge, which is how many 14-ounce tubes you can push through before the battery dies. A gun that handles 7 to 16 cartridges per charge is enough for a full day of farm or fleet work. If you buy a tool-only model, you need to own the matching battery system already, or factor the cost of a battery and charger into your decision.
FAQ
How many PSI do I need in an electric grease gun?
Will an electric grease gun fit standard 14 oz grease cartridges?
How long does a cordless grease gun battery last?
What is the difference between a 2-speed and variable speed grease gun?
Why does hose length matter on a grease gun?
Can I use an electric grease gun on a zero-turn mower?
Is a lock-on trigger worth having?
How do I prime an electric grease gun after changing cartridges?
Final Thoughts: The Verdict
The clear winner for most people is the electric grease gun from DEWALT because it pairs 10,000 PSI with a massive 16-cartridge battery life. If you want an affordable, arthritis-friendly daily driver, the TaskStar with its lock-on trigger and two batteries is the value choice. And when you need precision PM dosing on a pro job, the Milwaukee M18 2646-20 with its pre-set grease counter and 48-inch hose is the one to grab.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gardening Beyond earns from qualifying purchases. This does not affect which products we feature.