5 Reasons 3,400+ Equipment Owners Ditched the Hand Pump for a Grease Gun That Runs on the Batteries They Already Own
A dry pin doesn't announce itself. It wears quietly until the day it seizes — and the reason it went dry is usually that the fortieth zerk was one hand-pump too many. Here's why tractor, excavator, and trailer owners are moving to a cordless gun that snaps onto the DeWalt 20V or Milwaukee M18 batteries already sitting on their charger.
The Zerk You Skip Is the One That Fails
Nobody skips the first ten fittings. It's the last twenty — under the machine, behind the boom, on the far side of the trailer — that get a “next time.” Hand-pumping forty zerks is a forearm workout with a mess at the end, so the maintenance interval quietly stretches from monthly to whenever.
A trigger does the pumping. You just hold the coupler on and watch the grease come out the seal. When the job takes ten minutes instead of forty, it stops getting postponed.
It Runs on the Batteries Already on Your Charger
The dealbreaker with most cordless grease guns isn't the gun. It's the fourth proprietary battery and charger you have to buy and keep track of. This one ships as a bare tool because it doesn't need its own — it takes the DeWalt 20V or Milwaukee M18 packs you already own.
Same battery you run your impact on. Same charger on the wall. Nothing new to store, lose, or replace.
Up to 12,000 PSI — Enough to Move a Track Tensioner, Not Just Fill a Bearing
Track tensioners on a skid steer or excavator are the job that breaks hand guns — and elbows. Owners running this class of gun report moving them on compact track loaders, dozers, and a 27-ton excavator without drama.
The motor delivers up to 12,000 PSI of steady, controlled pressure and pushes through stiff, cold fittings that a hand pump just bounces off of. Trailer bearings, u-joints, and pivot pins are a walk by comparison.
A 39″ Hose and Four Couplers Reach the Fittings You Used to Crawl For
The zerks that get skipped are the ones you can't get a straight shot at. The 39-inch flex hose puts the coupler where the fitting is while the gun stays where your hand is comfortable. Four couplers — including a 90° adapter — handle the ones tucked behind a bracket.
The grip rotates between pistol and in-line, so you can hold it like a drill under a trailer or straight-on above a loader arm. An LED lights the fitting so you're not greasing by feel.
It Ships as a Kit — Case, Strap, Couplers, Light
Name-brand guns tend to arrive as a bare tool in a box: no case, no strap, no fittings. You buy those separately, and they cost real money. This one comes with the hard case, the shoulder strap, all four couplers, and the LED already in the box.
The strap matters more than it sounds. If you're doing thirty fittings on a truck, you stop noticing the weight of the gun. It also loads from a cartridge or from bulk grease — whichever your shop already stocks.
One cordless grease gun that runs on your DeWalt 20V or Milwaukee M18 batteries, loads from cartridge or bulk, and ships with everything you need to grease a machine except the battery and the grease.
Why $120 off? It's a Labor Day flash sale, and fall is when equipment gets greased before it sits for winter. We'd rather sell through now, while it's useful, than hold inventory until spring. When the sale ends, the price goes back to $260 — that's the whole story.
$139.95 puts a trigger on the job before the next service interval — $120 off while the Labor Day Flash Sale runs, free shipping, and 30 days to change your mind.
Get GreaseVolt — Save $120 →GreaseVolt is a bare tool; battery and grease sold separately. DeWalt and Milwaukee are trademarks of their respective owners. GreaseVolt is not affiliated with, endorsed by, or manufactured by either company; compatibility refers to battery fitment only.