WORKPRO 1/4-Inch Pneumatic Straight Die Grinder — 25,000 RPM with 1/4" & 1/8" Collets

Powerful, Lightweight Pneumatic Die Grinder for Precision Work

Meet the WORKPRO 1/4-Inch Pneumatic Straight Die Grinder, a compact, air-powered tool built for detail work across metals, plastics, and composites. It reaches up to 25,000 RPM when paired with a compatible compressor, delivering fast material removal with controlled cutting, shaping, and finishing. Operate at about 90 psi with an air flow of roughly 85.5 L/min to balance speed and control for long sessions.

Two collets are included—1/4" and 1/8"—so you can swap in a variety of grinding bits, burrs, and polishing accessories in minutes. The straight head geometry keeps your hand in a natural position for precise guiding, while the lightweight body (about 0.72 lb) reduces fatigue during extended work on curved panels, weld beads, or tight corners. A safety latch integrated into the trigger helps prevent accidental starts, adding dependable control in busy shops and crowded workspaces.

Design matters in real work. A rear-exhaust system directs spent air away from your face, while the inline inlet filter helps protect the tool from contamination. Operators should keep the tool lubricated; routine oiling is recommended to maintain performance and longevity. Before connecting the air line, remove the dust plug to ensure a clean, airtight connection.

What can you accomplish with this grinder? It excels at welding preparation, deburring, edge cleanup after cutting, and material shaping. In fabrication shops, automotive bays, or DIY garages, it pairs with a broad range of bits for grinding, polishing, and light material finishing. While air power can sustain higher RPMs than many electric tools, performance depends on a capable compressor—ensure your setup can support continuous use.

Key specs at a glance

• Air-powered straight-head design for reach and precision
• Includes 1/4" and 1/8" collets for versatile bit compatibility
• Safety latch to prevent unintended starts
• Rear-exhaust directs airflow away from the operator
• Lightweight build around 0.72 lb for one-handed operation
• Lubrication required for ongoing performance; oil included

What’s in the box

• WORKPRO 1/4-Inch Pneumatic Straight Die Grinder
• 1 x 1/4" collet
• 1 x 1/8" collet
• Maintenance oil for regular lubrication
• User guide

Note: Please remove the DUST PLUG before connecting the air line to ensure a proper seal and reliable operation.