Ingersoll Rand 307B Die Grinder

307B Ingersoll Rand 1/4" Die Grinder. The 307B 1/4" straight die grinder won’t let you down. It is durable, versatile and cost effective, these grinders are great for porting, weld grinding, smoothing edges, de-burring and polishing. Comfort—Ergonomic and lightweight, the 307B is comfortable to use for longer stretches of time. Longer life—The 307B's durable metal housing and powerful vane motor help make it a trusted tool that will last for years to come. Model number: 307B. Collet size: 1/4" (6 mm). Rated power: 0.25 hp. Average air consumption: 6 CFM (170 l/min). Air consumption under load: 24 CFM (680 l/min). Maximum free speed: 21,000 rpm. Exhaust: Front. Sound pressure: 92 dB(A). Air inlet: 1/4". Minimum hose size: 3/8". Length: 5.27" (134"). Weight: 1.02 lbs (0.46 kg).