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8001 WALLACE RD., EDEN PRAIRIE, MN 55344
Standard 19100215 D01
Standard 19100215 A01
Employee injured when grinding wheel shatters
Employee #1 was preparing to true up the face of a grinding wheel that was mount ed on a Themacs tool post grinder. As the guard on the grinder was turned on, th e wheel shattered and struck him in the right upper chest. He sustained cuts and lacerations and was hospitalized. Subsequent investigation revealed that the pu lleys on the motor and spindle shafts were reversed, causing the wheel to travel more than four times the rated wheel speed of 3,600 rpms. The no-load motor spe ed is 7,500 rpm; therefore, the estimated grinding wheel speed with a pulley rev ersal of 2 to 1 was up to 15,000 rpms.
Data sourced from Minnesota Department of Labor & Industry, Minnesota Attorney General, federal OSHA, and municipal permit offices. Records are public and may not reflect pending appeals or corrections.