Dynabrade international offers air-powered pencil grinder. The product range includes grinders of speeds 65,000, 50,000 and 35,000 rpm. The tool is ideal for precision deburring and metal removal on investment castings. The dynabrade pencil grinder has a unique turbine motor, which is controlled by a patented governor, resulting in constant speed of air-motor while the tool is in use. The efficient air turbine design uses a maximum of only 8 scfm [227 lpm] at 90 psi [6.2 bars], 5 scfm [142 lpm] at idle. The turbine design of the tool means there are no vanes or blades to wear out or break, minimizing repair cost and down time. The tool never needs oil. The tool will accept a number of carbide burs as well as other accessories, which load quickly and easily into the collet. Easy-change collet inserts are available in sizes of 1/8", 3/32" and 3 mm. The tool runs quietly at 68 db [a], and has high useable power.
