Ingersoll Rand 301B Air Die Grinder – 1/4-Inch Right Angle, 21,000 RPM, Lightweight Aluminum Housing

Overview

The Ingersoll Rand 301B Air Angle Die Grinder is built for daily shop use, offering a balance of durability, efficiency, and controllable performance. Its compact form packs a surprising amount of capability, letting you approach corners, edges, and recesses with precision, while keeping your workflow smooth and straightforward.

Power, speed, and control

At the heart of the tool is a 0.25 HP motor that runs on compressed air, delivering up to 21,000 rpm. The right-angle head improves accessibility in tight spaces, so you can reach fillets, deburrs, and small port textures where a straight grinder would struggle.

The tool's aluminum housing provides a sturdy, lightweight shell that can withstand tough operating conditions. Paired with durable ball-bearing construction, it stays balanced, minimizes vibration, and contributes to longer-term reliability. The integrated safety-lock throttle helps prevent unintended starts, promoting safer operation in busy work areas. A front exhaust directs spent air away from the work surface, helping to keep your bench, clamps, and parts cleaner during ongoing work.

What you get and how you can use it

• The 301B ships with a 1/4-inch and a 6 mm collet, expanding its compatibility with common bits and burrs for grinding, shaping, and deburring.
• Lightweight design — just over one pound — supports comfortable use over extended sessions and reduces operator fatigue.
• With the combination of power, speed, and a compact footprint, this tool is well-suited for general-purpose grinding, cutting, polishing, and surface finishing tasks in small components.

Practical tips for maximizing value

• Adopt appropriate safety gear and follow tool air supply instructions. Start with a light touch and progress as needed to minimize heat and wear.
• Exchange collets as necessary to match your bit diameter, and keep the collet and spindle clean for best performance.
• Store the grinder with the front exhaust clear to preserve your work surface from debris and oil residues.

While no single tool can cover every job, the 301B offers a compact, capable option for general grinding and finishing tasks in tight spaces, with predictable results in routine shop workflows.