Jet
Jet R12 1/4 in. Air Die Grinder 20,000 RPM
Right-angle pneumatic die grinder with a 1/4-inch collet and lock-off safety switch runs at 20,000 RPM
- TypeAir Die Grinders
- Right-angle design for tight-space access
- 20,000 RPM maximum speed for fast material removal
- 1/4-inch collet accepts standard accessories
- 1/4-inch air inlet fits common shop hoses
- Lock-off switch prevents accidental start-up
Jet R12 Right-Angle Die Grinder
The Jet R12 is a pneumatic right-angle die grinder built for metal fabrication, weld cleanup and tight-corner deburring. Its 1/4 in. collet accepts standard carbide burrs and mounted points. A lock-off switch prevents accidental throttle engagement. The tool runs on compressed air and delivers 20,000 RPM for fast material removal.
Upgrade From Straight Die Grinders
Switching from a straight die grinder is worthwhile when access is limited by flanges, pipe runs or frame rails. The right-angle head reaches spots a inline tool cannot touch without disassembly. If your work stays in open areas a straight grinder remains simpler and lighter.
Installation And Common Issues
Connect the 1/4 in. air inlet to a regulated supply with clean, dry air and an inline lubricator. Most problems come from contaminated air lines causing premature vane wear or from running above the rated speed which damages the collet and bearings. Check the lock-off switch function before each shift.
Highlights
- Right-angle design for tight-space access
- 20,000 RPM maximum speed for fast material removal
- 1/4-inch collet accepts standard accessories
- 1/4-inch air inlet fits common shop hoses
- Lock-off switch prevents accidental start-up
Specifications
| Type | Air Die Grinders |
|---|---|
| Brand | Jet |
Questions about this item
What size air hose fitting does the 1/4 in. air inlet on the Jet R12 require?
The grinder has a 1/4 in. air inlet connection, so use a 1/4 in. NPT quick-connect fitting or coupler that matches your compressor hose.
How do I engage the lock-off switch before the tool runs?
Press the lock-off lever down with your thumb while squeezing the throttle trigger; releasing the lever locks the trigger so the grinder cannot start accidentally.
When should I lubricate the air motor and what oil should I use?
Add 2–3 drops of pneumatic tool oil into the air inlet before each day of use to keep the vanes and bearings running freely at 20,000 RPM.
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