Tag Archives: Die Grinder Review

We brought the Ingersoll Rand 301B 1/4" collet air die grinder onto our bench with one question in mind: does a 21,000 RPM free-speed tool earn a permanent hook in our shop, or is it just another loud promise? Right away, the 301B feels purpose-built—compact in the hand, eager off the trigger, and clearly designed for the kind of tight-detail work that separates “good enough” from “dialed in.” We ran it through deburring, light port work, and cleanup on stubborn edges, paying attention to control as much as raw speed. In this review, we’ll break down how it handles, what it demands from our air setup, and whether it fits our day-to-day workflow.