What the 12V Cordless Grease Gun Is
This is a 12V battery grease gun built around a 180 W brushless DC motor. It delivers trigger-metered flow of 50-120 g/min at up to 8,000 PSI maximum working pressure, loaded from a 400 g cartridge or bulk-filled through a suction port. It exists for the technician servicing scattered fittings in construction, agriculture, and fleets, where shop air and mains power are not on site.
Declared Specifications
| Item | Specification |
|---|---|
| Motor | 180 W brushless DC |
| Nominal voltage | 12V (10.8-12.6V) |
| No-load speed | 2,400 RPM |
| Load current | 8-15 A |
| Maximum working pressure | 8,000 PSI (551 bar) |
| Flow | 50-120 g/min, trigger-adjustable 10-100 |
| Cartridge | 400 g standard, 1-5/8-12 TPI thread |
| Bulk fill | 450 ml via suction port |
| Output per charge | 7-13 cartridges (2.0 or 4.0 Ah battery, NLGI 0-2) |
| Battery | 2.0 / 4.0 Ah lithium-ion, removable, with BMS |
| Charger input | 100-240V AC |
| Hose | 915 mm (36 in) steel-braided |
| Coupler | 4-jaw hydraulic, 1/8 NPT, for standard Zerk fittings |
| Dimensions | 355 x 95 x 280 mm |
| Weight | 3.3 kg with battery, 2.1 kg tool only |
| Operating temperature | -20°C to +50°C; charging 0-45°C |
| Grease | NLGI 0-2 |
Pressure, Flow, and Trigger Control
The 8,000 PSI figure is capability, not a target. It exists so the gun can push through a blocked fitting or a long feed line when needed; the trigger meters the real work, adjustable across 10-100. This distinction is the most common misunderstanding with any grease gun: maximum pressure tells you what the gun can overcome once, while trigger position decides how much grease actually moves. Match the stopping rule to the machine: stop when relief grease appears at the fitting seal, or when the manufacturer’s specified quantity is delivered, never by counting trigger seconds.
Loading: Cartridge or Bulk Fill
| Method | Capacity | Best when |
|---|---|---|
| Cartridge | 400 g standard thread | Clean, fast swaps in the field |
| Bulk fill | 450 ml via suction port | High-volume service from a pump |
Most standard 400 g cartridges fit the 1-5/8-12 TPI thread, but confirm fit before ordering. After loading a new cartridge, bleed the air until grease flows without gaps: a half-primed gun is the main source of weak-gun complaints.
Cordless vs Pneumatic vs Manual
| Type | Choose when | Limit |
|---|---|---|
| Cordless 12V | Field service, no air or mains at the machine | Battery runtime per charge |
| Pneumatic | Shop work with steady air | Tethered to the air line |
| Manual | Occasional single fittings | Effort rises with grease stiffness |
The grease gun types guide covers the trade-offs across all designs, and the 20V cordless grease gun suits heavier workloads. A corded electric grease dispenser or air-driven pneumatic grease dispenser fits a fixed bench, while the grease pump hub and the grease pump guide cover the supply side.
Cold Weather, Batteries, and Routine Care
Below freezing, two things stiffen at once. The battery delivers less outside -10°C to +40°C, and the grease resists pumping, so the motor draws its 8-15 A harder. Keep a spare battery warm in the cab and confirm the grease grade for your equipment, because cold weather changes pumpability more than the grade alone suggests. Charge only between 0°C and 45°C. After use, wipe the 4-jaw coupler, inspect the 915 mm steel-braided hose for kinks, and store batteries partly charged rather than flat.
Want a runtime estimate for your grease and duty cycle? Tell us through our contact page.
Frequently Asked Questions
What is the 12V cordless grease gun?
It is a 12V battery grease gun with a 180 W brushless motor. It meters grease by trigger for servicing scattered fittings.
How many cartridges per charge?
Seven to thirteen, depending on battery capacity and grease grade. A 4.0 Ah battery with NLGI 0-2 grease gives the highest count.
Will 8,000 PSI damage bearings?
That figure is capability, not a target. Stop when relief grease appears or the specified quantity is delivered.
Bulk or cartridges?
Cartridges keep loading clean and fast. Bulk fill from a pump suits high-volume field service.
How does cold weather affect it?
Both the battery and the grease stiffen in the cold. Keep batteries warm and confirm the grease grade.
How do I prime after loading?
A new cartridge may need bleeding. Run the air-bleed until grease flows without gaps.
Which grease should I use?
NLGI 0 to 2 suits the gun. Confirm the grease grade for your equipment.
When is manual or pneumatic better?
Manual guns suit occasional single fittings. Pneumatic guns suit shop work with steady air.
Who can estimate my runtime?
Ask about runtime and fit through our contact page. Include your grease grade and typical duty cycle.
Who builds and supports these guns?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
