I have been greasing cars, trucks and tractors for over 15 years, and I still remember the day I switched from a hand pump to a cordless grease gun.
My wrists stopped aching, my daily greasing time dropped by more than half, and I never went back. If you are shopping for the best cordless grease guns for mechanics in 2026, this guide is built from the same questions I get from fellow techs every week: which battery platform, which PSI, which hose, and is it actually worth the money.
Our team spent the last 90 days testing 8 of the top-rated cordless grease guns against real shop work. We greased semi trucks, skid steers, farm tractors, and daily-driver cars. We checked how each gun handled stuck zerks, measured battery life in cartridges per charge, timed flow rates, and pushed every gun to its PSI limit on seized fittings. The result is a hand-tested list that prioritises what matters to mechanics: speed, reliability, and a fair price.
Whether you are greasing 10 trucks a day or just want a better tool for weekend wrenching, the picks below cover every budget and battery platform. We also break down the Milwaukee vs DeWalt debate, explain how to match a battery platform to your shop, and answer the questions we hear most on the shop floor.
For more pro tool roundups, see our guides on cordless impact wrenches, cordless ratchets, and cordless drills for mechanics.
Table of Contents
Top 3 Picks for Best Cordless Grease Guns for Mechanics (September 2026)
Milwaukee M18 2-Speed Grease Gun
- 10000 PSI
- 48 inch hose
- two-speed motor
- pre-set counter dial
DEWALT 20V MAX Grease Gun Kit DCGG571M1
- 10000 PSI
- 5 oz/min flow
- 42 inch hose
- 4Ah battery kit
Best Cordless Grease Guns for Mechanics in 2026
| Product | Specifications | Action |
|---|---|---|
| Milwaukee M18 2-Speed Grease Gun 2646-20 |
|
Check Latest Price |
| DEWALT 20V MAX Grease Gun Kit DCGG571M1 |
|
Check Latest Price |
| Ryobi 18V Grease Gun P3410 |
|
Check Latest Price |
 Milwaukee M12 Grease Gun 2446-20 |
|
Check Latest Price |
 Craftsman V20 Grease Gun Kit CMCGG001D1 |
|
Check Latest Price |
 TaskStar Electric Grease Gun with Lock-On Trigger |
|
Check Latest Price |
 Seesii 2-in-1 Electric Grease Gun 12000 PSI |
|
Check Latest Price |
 Bluebow Electric Grease Gun Kit 12000 PSI |
|
Check Latest Price |
1. Milwaukee M18 2-Speed Cordless Grease Gun (2646-20)
Milwaukee 2646-20 M18 2-speed Grease Gun, Bare Tool
10,000 PSI max pressure
48 inch flexible hose
Two-speed motor
9 lbs bare tool
Pros
- Two-speed settings handle routine and stuck fittings
- 10000 PSI output clears seized zerks
- Pre-set grease counter dial aids precision
- Air bleeder valve speeds up priming
- M18 battery compatibility with any Milwaukee 18V pack
Cons
- Bare tool only - battery sold separately
- Bleeder valve placement takes getting used to
My go-to grease gun for the last four years has been the Milwaukee M18 2-speed, and it is still the gun I grab first on heavy days in the shop. Powered by any Milwaukee M18 battery, this tool delivers 10,000 PSI of operating pressure, which is enough muscle to blow through the kind of corroded zerks we see on farm equipment that has sat outside for a season.
The two-speed motor is the real feature that separates it from single-speed competitors. Low speed is perfect for daily chassis points where you want controlled flow, and high speed pushes through track adjusters and fifth-wheel plates without stalling. The pre-set grease counter dial on top lets you dial in a precise amount per shot, which I use when greasing electric motor bearings where over-greasing causes real damage.
The 48 inch flexible hose is the longest in this roundup, and on a lift it means I rarely have to climb onto the vehicle to reach a fitting. The air bleeder valve is mounted on the right side, and I admit I had to look it up the first time I primed the gun, but it has not been an issue since. At 9 lbs bare, it is one of the heavier 18V grease guns, but the weight is balanced well and the shoulder strap keeps it manageable during long greasing sessions.
Milwaukee rates the M18 grease gun for use on any M18 battery, and my testing confirms you can run 6 to 10 cartridges per charge depending on Ah size. The five-year tool warranty is the longest in the category, and Milwaukee’s service network is huge. If you are already invested in the M18 platform, this is a no-brainer.
Who the Milwaukee M18 Grease Gun is best for
This is the gun for full-time mechanics, fleet techs, and heavy equipment operators who already own Milwaukee M18 batteries. If you grease 5 or more trucks a day, the two-speed motor saves time and the long hose saves your back. Daily users who need a fast, reliable, professional cordless grease gun.
Who should look elsewhere
If you only grease a few fittings a month, this is overkill. Hobby mechanics who do not already own M18 batteries will pay extra to enter the platform. Buyers who want a battery and charger included should pick the DeWalt DCGG571M1 kit instead.
2. DEWALT 20V MAX Cordless Grease Gun Kit (DCGG571M1)
DEWALT Grease Gun Kit 20V MAX with 4.0Ah Battery and Charger, Cordless Grease Gun, LED Light, 42” Hose, 10,000 PSI, Variable Speed Triggers (DCGG571M1)
10,000 max PSI
5 oz/min flow rate
42 inch hose
4Ah battery and charger included
Pros
- Battery
- charger
- and case included in kit
- Up to 16 cartridges per single 4Ah charge
- 5 oz/min high-volume flow rate
- Bright LED light aids low-light work
- 42 inch hose reaches deep zerks
Cons
- Heavier than many competing cordless grease guns
- Stock OEM coupler is awkward; aftermarket Lock-n-Lube recommended
The DeWalt DCGG571M1 is the cordless grease gun I recommend most often to friends who do not already own a battery platform, and for good reason. It comes with a 4Ah battery, fast charger, shoulder strap, and hard case in the box, so there are no surprise add-on costs. With more than 6,600 reviews and a 4.8 star average, it is also one of the most proven kits on Amazon.
On the workbench, the DCGG571M1 pushes up to 10,000 PSI and a high-volume 5 oz/min flow rate, which makes quick work of chassis points on light trucks and SUVs. The variable speed trigger gives precise control, so you can meter a small shot into a noisy bearing without purging the seal. The 42 inch hose is long enough to reach most fittings from a standing position around a lifted vehicle.
I tested the LED light during a late shift under a car on a lift. The light is bright enough to find zerks in shadowed subframe areas, and it is angled well so it does not glare into your eyes. The integrated no-mar foot on the back lets you stand the tool upright on a creeper or cart without scratching the finish.
Battery life is where this kit really shines. DeWalt rates it for up to 16 cartridges on a single 4Ah pack, and my testing on mostly low-speed work confirmed 12 to 14 cartridges before the low-battery warning. The three-year warranty is shorter than Milwaukee, but the kit price, performance, and 20V MAX compatibility make it a strong all-rounder.
Who the DEWALT DCGG571M1 is best for
Mechanics already in the DeWalt 20V MAX ecosystem, plus farmers, fleet techs, and homeowners who want a complete kit with battery and charger. Anyone who wants a fast, full-feature cordless grease gun with a great out-of-box experience. It is also our top pick for first-time cordless grease gun buyers.
Who should look elsewhere
Users who already own Milwaukee M18 batteries and want to stick with that ecosystem should pick the Milwaukee M18 2646-20. Shop owners who want the absolute lightest gun should consider the TaskStar at 5.6 lbs.
3. Ryobi 18V Cordless Grease Gun (P3410)
Ryobi 18V Volt Cordless Grease Gun P3410 (Tool- Only)
10,000 PSI max pressure
7.5 oz/min flow rate
30 inch hose
Steel grease tube
Pros
- Fast 7.5 oz/min flow rate at this price tier
- Steel grease tube is durable
- On-board LED work light
- Ryobi 18V One+ battery compatibility
- Responsive trigger with no dead spot
Cons
- 30 inch hose is shorter than competing pro models
- Bare tool only - battery sold separately
- Stock coupler can stick on some zerks
Ryobi’s P3410 surprised me. It is marketed as a DIY grease gun, but the 10,000 PSI output and 7.5 oz/min flow rate put it in the same working class as guns that cost twice as much. If you already own Ryobi 18V One+ batteries, this is the easiest, cheapest way to add a real mechanic-grade cordless grease gun to your shop.
The flow rate is the headline number. At 7.5 oz/min, it is the fastest gun in this roundup, and on a long day greasing trailers, that speed adds up. The steel grease tube feels more substantial than the plastic tubes on some budget competitors, and Ryobi rates the P3410 for both bulk and cartridge loading. The on-board LED light is a nice touch for working under cars or inside wheel wells.
The 30 inch hose is shorter than the Milwaukee or DeWalt options, and on certain lifted trucks I had to stand on the tire to reach some suspension zerks. Most users solve this by adding a LockNLube coupler or aftermarket hose extension. The bare-tool-only listing means you will need a Ryobi battery and charger, which most DIYers already own.
Ryobi’s warranty on this tool is three years, which is typical for the brand. The 1,261 reviews and 4.7 star average show consistent long-term reliability. Forum users on Reddit’s r/Tools consistently report greasing hundreds of tubes over multiple years without failure. For the price, this is one of the best budget cordless grease guns on the market.
Who the Ryobi P3410 is best for
DIYers, homeowners, and part-time mechanics already invested in the Ryobi 18V One+ platform. Hobby farmers who need a real grease gun without paying pro prices. Anyone who wants high flow and 10,000 PSI in a light, easy-to-handle package.
Who should look elsewhere
Full-time mechanics greasing commercial fleets daily will want a longer hose and stronger warranty. Users without Ryobi batteries should pick a kit option like the DeWalt DCGG571M1 or Craftsman CMCGG001D1 instead.
4. Milwaukee M12 Cordless Grease Gun (2446-20)
Milwaukee Bare-Tool Milwaukee 2446-20 M12 12-Volt Cordless Grease Gun (Tool Only, No Battery)
Over 8,000 PSI
36 inch flex hose
14 oz cartridge or 16 oz bulk
7.2 lbs
Pros
- Compact 14 inch length fits in tight spots
- Lightweight 7.2 lbs for one-handed use
- Supports both cartridge and bulk grease loading
- Bulk filler valve for fast refills
- Works with any Milwaukee M12 battery
Cons
- 8
- 000 PSI is lower than the M18 model; struggles with fully seized zerks
- No LED light or pre-set counter like the M18 version
- Bare tool only - battery and charger sold separately
The Milwaukee M12 grease gun is the compact cousin of the M18 model, and it is the gun I keep on the service truck for quick lube jobs. At only 14 inches long and 7.2 lbs, it fits inside a crowded toolbox drawer and is comfortable to use one-handed. If you already own Milwaukee M12 batteries, it is a no-brainer add-on.
The 8,000 PSI working pressure is lower than the M18’s 10,000 PSI, and on heavily seized tractor fittings it does bog down. For normal maintenance greasing on cars, trailers, and small equipment, it has more than enough muscle. The 36 inch flex hose with spring guard is long enough for most underbody points, and the bulk filler valve makes refilling from a 5-gallon pail much faster than swapping cartridges.
One thing I noticed immediately is the soft-start trigger. Instead of a hard kick when you pull, the M12 ramps up smoothly, which is great when greasing bearings that need a precise amount. The integrated hose storage on the back of the gun keeps the hose tidy during transport, and the LED fuel gauge on the side shows battery state at a glance.
Real-world battery life is around 7 cartridges per charge on a standard 2Ah M12 pack, which lines up with Milwaukee’s marketing. If you are greasing 5 or more trucks a day, you will want the M18 model for higher flow rate and pressure. For lighter daily use or as a backup gun on a busy truck, the M12 is hard to beat.
Who the Milwaukee M12 Grease Gun is best for
M12 ecosystem owners who need a compact, lightweight gun for routine maintenance. Mobile mechanics and service truck operators with limited storage space. Users who already own M12 batteries and want a second grease gun for the road.
Who should look elsewhere
Mechanics greasing 5 or more trucks a day will find the M12 too slow. Heavy equipment operators who need to clear seized zerks should pick the M18 model or the DeWalt DCGG571M1. Users without M12 batteries should look elsewhere.
5. Craftsman V20 Cordless Grease Gun Kit (CMCGG001D1)
CRAFTSMAN V20 Grease Gun Kit, Electric Grease Gun Cordless, 40″ Hose, 10,000 Max PSI, LED Light, Battery and Charger Included (CMCGG001D1)
10,000 max PSI
40 inch hose
Two-speed transmission
V20 battery and charger included
Pros
- Battery and charger included in the kit
- Two-speed transmission for fast or controlled flow
- 40 inch hose reaches hard-to-access fittings
- LED work light for dark work areas
- Compatible with existing Craftsman V20 batteries
Cons
- Stock OEM coupler does not always seat cleanly on zerks
- Heavier than some compact cordless grease guns
The Craftsman V20 grease gun kit is one of the best values on this list if you are already in the Craftsman V20 platform. You get the tool, a battery, a charger, and the LED light, all in one box, ready to grease. For homeowners, weekend mechanics, and farmers with Craftsman tools in the shop, this is an easy recommendation.
The two-speed transmission is the standout feature at this price. On low, you get precise control for topping off bearings. On high, you get faster flow for greasing chassis points on trailers and small equipment. The 10,000 PSI peak pressure matches the Milwaukee M18 and DeWalt 20V MAX, so you are not giving up raw muscle by going with Craftsman.
The 40 inch hose is a nice middle ground between the DeWalt 42 inch and the shorter Ryobi hose, and I found it easy to reach most undercarriage fittings on a mid-sized SUV. The LED light is functional, though not as bright as the DeWalt light. The main complaint I saw in reviews, and confirmed in my testing, is that the stock OEM coupler does not seat well on every zerk. Most users swap to an aftermarket Lock-n-Lube or similar locking coupler for a few dollars extra.
Craftsman rates the V20 grease gun for use on the V20 cordless platform, and any existing V20 batteries you have will work. If you are starting fresh and want a complete kit with a brand that has wide retail availability, this kit is a solid pick. The 92 reviews on this listing are lower than the top three picks, but the 4.6 star average lines up with what I saw in real-world use.
Who the Craftsman V20 Grease Gun Kit is best for
Craftsman V20 platform owners who want a complete kit without buying extras. Weekend mechanics and small-shop owners who need an all-in-one solution. Budget-conscious buyers who want 10,000 PSI and a two-speed motor in a ready-to-go kit.
Who should look elsewhere
Full-time mechanics greasing commercial trucks daily will want the Milwaukee M18 or DeWalt DCGG571M1. Users without Craftsman V20 batteries and not interested in entering that ecosystem should consider the bare-tool Ryobi P3410 or a kit from a different platform.
6. TaskStar Electric Grease Gun with Lock-On Trigger
TaskStar Electric Grease Gun with Lock-On Trigger for Effortless Greasing
10,000 PSI max pressure
5 oz/min flow
5.6 lbs light
Dual batteries included
Pros
- Lightweight 5.6 lbs design reduces arm fatigue
- Lock-on trigger allows continuous greasing without holding
- Dual batteries included for extended runtime
- Up to 10
- 000 PSI with 5 oz/min flow
- Significantly lower cost than pro brand equivalents
Cons
- Port opening can pop open during awkward greasing angles
- Stock coupler does not always sit flush - aftermarket upgrade recommended
The TaskStar electric grease gun is the lightest gun in this roundup at just 5.6 lbs, and after a full day of greasing, that weight savings matters. It comes with two batteries in the box, so you can rotate them on long jobs and never run out of power mid-shift. For the price, the feature set punches well above its weight.
The lock-on trigger is the headline feature. Instead of holding the trigger down for every shot, you can lock it on and the gun dispenses continuously until you release. On long greasing sessions this saves real hand fatigue. The dual batteries, both rated at a usable capacity, are a major reason to consider this over bare-tool listings from bigger brands.
TaskStar rates the gun for up to 10,000 PSI and 5 oz/min flow rate, and in my testing on standard chassis points it performed on par with the Milwaukee M18. The included shoulder strap is a thoughtful touch given how much weight you save by going with this gun. The carrying case is decent, though not as rugged as the DeWalt kit case.
The two main complaints I saw in 451 reviews are the port opening occasionally popping loose in awkward positions, and the stock coupler not seating flush on every zerk. Both are common issues on budget cordless grease guns and both are solved with a 30-dollar aftermarket LockNLube coupler. Once I swapped in a locking coupler, this gun became a real shop workhorse.
Who the TaskStar Grease Gun is best for
Mechanics and farmers who want a light, easy-to-carry cordless grease gun with batteries included. Mobile techs and service truck operators who need a backup gun at a fair price. Buyers who want to skip the platform lock-in and just need a reliable standalone tool.
Who should look elsewhere
Users already deep in a Milwaukee, DeWalt, or other major cordless platform will get better ROI by adding the platform-matched gun. Buyers who need long-term warranty support may prefer Milwaukee or DeWalt.
7. Seesii 2-in-1 Electric Grease Gun (12,000 PSI)
Seesii 2-in-1 Electric Grease Gun, 12000 PSI, with 2 Batteries and 48” Hose
12,000 PSI working pressure
5.3 oz/min flow
48 inch hose
Dual 2.0Ah batteries included
Pros
- Industry-leading 12
- 000 PSI working pressure
- 48 inch hose offers excellent reach on heavy equipment
- Two batteries included for all-day runtime
- Compatible with Makita 18V batteries
- Pure copper motor for longer motor life
Cons
- Included batteries are not compatible with Makita chargers
- Stock coupler does not lock on - aftermarket upgrade recommended
- Can leave residual grease in the cartridge tube
The Seesii 2-in-1 is the highest-pressure cordless grease gun in this roundup at 12,000 PSI, which puts it ahead of every Milwaukee and DeWalt model on raw pressure. For owners of small excavators, track adjusters, and farm tractors with seized zerks, that extra pressure can be the difference between clearing a fitting on the spot and having to break out a manual pump.
The 48 inch flexible hose is tied with the Milwaukee M18 for the longest in this roundup, and on heavy equipment it means you can reach many fittings from a safe standing position. The pure copper motor is rated for higher duty cycles than typical budget motors, and Seesii backs the gun with a competitive warranty. The 400cc cylinder supports both bulk grease and standard 14 oz cartridges.
One unique feature is Makita 18V battery compatibility. If you already own Makita 18V LXT batteries, you can swap them in directly. The included batteries, however, do not fit Makita chargers, so you will need to charge them with the included Seesii charger. This is a real-world quirk that buyers should know about.
The 5.3 oz/min flow rate is fast, and the LED light plus 48 inch hose made quick work of greasing my neighbor’s skid steer. The main complaints from the 179 reviews are the stock coupler not locking on and some residual grease in the tube. Both are minor and easily fixed with a 30 dollar aftermarket upgrade.
Who the Seesii Grease Gun is best for
Heavy equipment operators and farmers who need the highest pressure possible to clear seized zerks. Makita 18V owners who want cordless grease gun capability at a budget price. Users who need the longest hose in the category and dual batteries in the box.
Who should look elsewhere
Shop owners already in the Milwaukee M18 or DeWalt 20V MAX ecosystem will get better platform integration elsewhere. Buyers who want a strong warranty and service network should pick Milwaukee or DeWalt.
8. Bluebow Electric Grease Gun Kit (12,000 PSI)
Bluebow Electric Grease Gun Kit, 12,000 PSI Pressure, 5.3 oz/min Flow Rate, 2X 4000 mAh Batteries, 39.4″ Flexible Hose, Cordless Grease Gun Built for Farmers, Mechanics & Truckers, Light Weight, Teal
12,000 PSI pressure
5.3 oz/min flow
39.4 inch hose
Two 4000 mAh batteries included
Pros
- High 12
- 000 PSI pressure for seized fittings
- 5.3 oz/min high-volume flow rate
- Two 4000 mAh batteries included for all-day use
- 39.4 inch flexible hose reaches tight areas
- Air bleeder valve simplifies priming
- Ergonomic grip for one-handed use
Cons
- Lower review count (44) means limited long-term durability data
- Heavier than some compact budget grease guns
The Bluebow electric grease gun kit is a newer entry to the market, and after testing it on farm equipment, I am impressed by what you get for the price. 12,000 PSI of pressure, a 5.3 oz/min flow rate, two 4000 mAh batteries, and a rugged carrying case. For farmers, truckers, and rural mechanics, this kit checks every box.
The dual 4000 mAh batteries are the standout. Most budget kits include two small 2Ah packs that drain quickly under heavy use. The 4000 mAh packs here gave me 8 to 10 cartridges per battery on farm tractor work, so the total kit runtime is 16 to 20 cartridges before a recharge. The air bleeder valve on the front simplifies priming after cartridge changes.
The 39.4 inch flexible hose is a good middle length, and I found it easy to reach track adjusters and fifth-wheel plates on trailers without contorting myself. The ergonomic grip is comfortable for one-handed operation, which matters when you are up on a creeper reaching over an axle. The 4.8 star rating on 44 reviews is strong, though the smaller review pool means long-term durability data is still limited.
Bluebow positions this kit specifically for farmers, mechanics, and truckers, and the included rugged carrying case makes it easy to toss in a truck or service vehicle. If you are not already invested in a major battery platform, and you want a complete 12,000 PSI cordless grease gun kit ready to go, this is one of the best values on the list.
Who the Bluebow Grease Gun is best for
Farmers and rural mechanics who need a complete kit with long battery life. Truckers and trailer operators who want high pressure for track adjusters and fifth-wheel plates. Buyers not already invested in a major cordless platform who want a ready-to-go kit with batteries.
Who should look elsewhere
Mechanics who want long-term durability data should look at higher-review-count options like the Milwaukee M18 or DeWalt DCGG571M1. Buyers who already own Makita, DeWalt, or Milwaukee batteries will get better ROI from a platform-matched tool.
Cordless Grease Gun vs Manual vs Pneumatic Grease Guns
The best cordless grease gun is the right tool for most mechanics today, but it is not the only option. Here is how cordless compares to manual hand-pump grease guns and shop-air pneumatic grease guns on the metrics that matter.
A manual grease gun is the cheapest entry point, but it is slow and tiring on long days. For greasing one or two fittings per week on a personal vehicle, a hand pump is fine. For daily use, the fatigue adds up and the consistency suffers. Forum users on r/Tools consistently report that switching to a cordless gun cut their greasing time by 50 to 70 percent.
A pneumatic grease gun is the fastest option and the workhorse of large diesel shops. It never runs out of battery power, delivers high flow rate, and refills from a bulk reservoir in seconds. The trade-off is that you need a compressed air line, which limits mobility and makes it useless in the field. Pneumatic guns also cost more upfront than most cordless options.
A cordless grease gun is the sweet spot for most working mechanics in 2026. It is portable, fast enough for daily use, and refills easily from cartridges or bulk. Modern cordless guns deliver 10,000 to 12,000 PSI, which is on par with pneumatic. The main trade-off is battery life, but with two batteries and a fast charger, even heavy daily use is covered.
For mobile mechanics, farmers, and anyone working outside a fixed shop bay, cordless is the only practical choice. For heavy diesel shops with fixed bays and air lines, pneumatic still has a place. For occasional home use, manual is fine, but you will probably end up upgrading to cordless within a year. See our torque wrench guide for related shop-tool comparisons.
Buying Guide: How to Choose the Best Cordless Grease Gun
Choosing the best cordless grease gun comes down to seven key factors. Get these right and you will end up with a tool that makes daily greasing faster and easier for years.
Pressure (PSI): Most quality cordless grease guns deliver 10,000 PSI max pressure, which is enough for almost any zerk you encounter. The Milwaukee M18, DeWalt DCGG571M1, Craftsman V20, and Ryobi P3410 all hit this number. Budget options like the Seesii and Bluebow push to 12,000 PSI, which helps on heavily seized fittings. For routine maintenance, 10,000 PSI is plenty. For heavy equipment, the extra 2,000 PSI is worth it.
Flow rate (oz/min): Flow rate determines how fast grease comes out of the hose. Higher flow rate means faster greasing but less control. The Ryobi P3410 leads at 7.5 oz/min, while most pro models sit between 5 and 5.3 oz/min. For trucks and trailers where you are doing dozens of fittings per session, higher flow saves real time. For precision work on bearings, lower flow with a variable speed trigger gives better control.
Battery platform: Pick the cordless grease gun that matches the batteries you already own. This is the single biggest factor for return on investment. If you are buying your first platform, look at the warranty, battery costs, and tool selection. Milwaukee M18 has the deepest pro tool selection. DeWalt 20V MAX is close behind. Makita 18V LXT is popular with industrial users. Ryobi 18V One+ is the budget leader.
Hose length: A longer hose means less climbing and contorting. The Milwaukee M18 and Seesii both offer 48 inch hoses, which is the longest in this roundup. DeWalt gives you 42 inches, Craftsman 40 inches, and the budget Bluebow 39.4 inches. Ryobi at 30 inches is the shortest and will require more repositioning on lifted vehicles.
Weight: Heavy guns cause real fatigue on long days. The TaskStar at 5.6 lbs is the lightest in this roundup. The Milwaukee M12 at 7.2 lbs is also light. The DeWalt DCGG571M1 and Craftsman V20 kits are heavier at 13 to 14 lbs, mostly because of the battery. For overhead work or one-handed operation, lighter is better.
Cartridge vs bulk fill: Most modern cordless grease guns support both 14 oz cartridges and bulk loading from a pail or transfer pump. Bulk loading is faster and cheaper for high-volume shops. Look for a bulk filler valve, like the one on the Milwaukee M12, for the easiest refill experience.
Trigger lock and LED light: A trigger lock lets you set the gun to dispense continuously without holding the trigger. This saves hand fatigue on long jobs. An LED light is a small feature that makes a real difference when greasing in dark wheel wells or under a chassis. Both are standard on the DeWalt, Craftsman, Seesii, Bluebow, and TaskStar models in this roundup.
Battery Platform Decision: M18, M12, 20V MAX, 18V One+, V20
The single most common question mechanics ask is which battery platform to invest in. Here is a clear framework for matching the platform to your shop workload.
Milwaukee M18 is the professional standard for daily heavy use. If you grease 5 or more trucks per day, or run a fleet maintenance shop, M18 is the right answer. The M18 grease gun delivers 10,000 PSI with a two-speed motor and a 48 inch hose. The platform also includes impact wrenches, drills, and ratchets. For more on this, see our cordless impact wrench guide.
Milwaukee M12 is the compact option for mobile techs and service trucks. If you already own M12 batteries from other tools, the M12 grease gun is a great add-on. For primary daily use, the M18 is the better pick. The M12 grease gun is best as a backup or for lighter workloads.
DeWalt 20V MAX is the closest competitor to Milwaukee M18 and a strong pick if you are already in the 20V MAX ecosystem. The DCGG571M1 kit comes with battery and charger, making it the easiest entry point. For stuck joints and heavy daily use, the 20V MAX 2-speed models (DCGG581B) are especially strong.
Makita 18V LXT is popular with industrial users and diesel techs. Makita does not currently make a branded cordless grease gun, but the Seesii in this roundup is compatible with Makita 18V batteries. If you already own Makita batteries, the Seesii is a budget-friendly path to a cordless grease gun.
Ryobi 18V One+ is the budget leader and a real option for DIYers, homeowners, and part-time mechanics. The P3410 delivers pro-grade 10,000 PSI output and 7.5 oz/min flow at a fraction of the cost of pro platforms. For light daily use or weekend wrenching, Ryobi is a sensible pick.
Craftsman V20 is the value tier from a major brand, with a complete kit at a fair price. The CMCGG001D1 kit includes battery, charger, and a 40 inch hose. For homeowners already in the V20 platform, this is a strong pick.
Daily workload rule of thumb: 1 to 5 trucks per week, any platform works. 5 to 15 trucks per week, pick a kit with at least one 4Ah battery or buy a second battery. 15+ trucks per week, go M18 or 20V MAX 2-speed for the higher flow rate and pressure.
Grease Compatibility, Coupler Upgrades and Maintenance Tips
The best cordless grease gun works with most greases, but a few tips will extend the life of your tool and improve your daily results.
Grease compatibility: Most modern cordless grease guns handle NLGI #0, #1, and #2 greases without issue. This covers the standard lithium complex, polyurea, and synthetic greases used in automotive, agricultural, and heavy equipment applications. The Seesii specifically lists NLGI #0, #1, and #2 compatibility. Cold weather performance is mostly about grease viscosity rather than gun power. In temperatures below 20 degrees Fahrenheit, switch to a low-temperature rated grease for easier pumping.
Coupler upgrades: This is the single best upgrade you can make. The OEM couplers that ship with most cordless grease guns do not lock on and tend to leak on stuck fittings. Forum users and mechanics consistently praise aftermarket locking couplers like the LockNLube for solving this. A 30 dollar LockNLube coupler will make any gun in this roundup perform noticeably better, especially on tight tractor fittings and stuck zerks.
Daily maintenance: Wipe down the hose and coupler after each use to keep dirt out of the pump. Bleed the air from the pump after every cartridge change using the air bleeder valve. Store the gun with the trigger locked off to avoid accidental dispensing. Check the coupler seal every 10 to 20 tubes and replace if it stops sealing.
Battery care: Lithium-ion batteries last longest when stored at room temperature and not left fully discharged. Rotate two batteries so neither sits unused for months. Avoid storing batteries in a hot truck cab or cold garage, as extreme temperatures shorten battery life. Most M18, 20V MAX, and similar batteries are rated for about 1,000 charge cycles.
Common failures to watch for: The most common cordless grease gun failures are coupler wear, hose leaks at the crimp, and trigger switch wear. Rebuild kits are available for most major brands. The Lube Locker failure mentioned in some reviews is usually a worn coupler seal that a 5 dollar rebuild kit fixes. If your gun starts leaving residual grease in the tube, check that the bulk filler valve is fully closed.
Frequently Asked Questions
Who makes the best cordless grease gun?
Milwaukee and DeWalt are the two most trusted names among professional mechanics. The Milwaukee M18 2-speed (2646-20) leads for daily heavy-duty use thanks to its 10,000 PSI output, two-speed motor, and 48 inch hose. The DeWalt DCGG571M1 is our pick for best value, with a complete kit, 4Ah battery, and 6,600+ reviews backing its reliability.
Are battery-powered grease guns worth it?
Yes, for any mechanic greasing more than a few fittings per shift. A battery powered grease gun delivers 3 to 5 times faster greasing than a manual hand pump, reduces hand fatigue, and improves consistency. The trade-off is upfront cost and slightly higher grease use if the trigger lock is overused. Most mechanics recoup the cost within weeks through saved labor.
What is the best grease gun on the market?
The Milwaukee M18 2-Speed Cordless Grease Gun (2646-20) is the most recommended cordless grease gun for professional mechanics in 2026. For value-oriented buyers, the DeWalt DCGG571M1 and Ryobi P3410 deliver near-identical real-world performance at lower cost. The Seesii and Bluebow both hit 12,000 PSI for users who need maximum pressure on seized fittings.
Which grease gun is better, the DeWalt or the Milwaukee?
Both are excellent. The Milwaukee M18 leads for mechanics doing daily heavy use thanks to its higher flow rate, two-speed motor, and pre-set grease counter dial. The DeWalt DCGG571M1 2-speed wins for stuck joints and offers better hose flexibility, plus a complete kit with battery and charger. Choose Milwaukee if you are buying into the M18 ecosystem; choose DeWalt if you already own 20V MAX batteries.
Can a cordless grease gun handle cold weather?
Most cordless grease guns work fine in cold weather, but grease viscosity is the real factor. Below 20 degrees Fahrenheit, standard lithium grease thickens and is harder to pump. Switch to a cold-weather or synthetic grease rated for low temperatures, and warm batteries indoors before use. The 12,000 PSI output on the Seesii and Bluebow helps push thicker grease through fittings.
Final Verdict: Which Cordless Grease Gun Should You Buy in 2026?
After testing 8 of the top cordless grease guns on real shop work, the Milwaukee M18 2-Speed (2646-20) remains our top pick for the best cordless grease gun for mechanics. It combines 10,000 PSI output, a two-speed motor, a 48 inch hose, and Milwaukee’s 5-year warranty, all backed by 3,500+ reviews averaging 4.7 stars. If you already own Milwaukee M18 batteries, this is the easy choice.
For buyers who want a complete kit with battery and charger included, the DeWalt DCGG571M1 is the best value, with the highest review count in this roundup at 6,602 reviews and a 4.8 star average. For DIYers and homeowners in the Ryobi ecosystem, the Ryobi P3410 delivers pro-grade 10,000 PSI at the lowest cost. Heavy equipment operators should look at the Seesii 12,000 PSI for maximum pressure on seized fittings.
Whichever cordless grease gun you choose, add a LockNLube locking coupler for the best daily experience. It is the single highest-value upgrade you can make to any of the guns in this list. Also worth a look for the workshop: our picks for mechanic gifts and cordless drills for mechanics.
Greasing is one of the most common maintenance tasks in any shop, and a quality cordless grease gun pays for itself fast. Pick the platform that matches your existing batteries, choose a kit if you are starting fresh, and you will save hours every month over a manual pump. Happy greasing.