From the Manufacturer
The JSM-619 is a heavy-duty 4" air operated angle grinder. It is constructed of rugged aluminum alloy for the housing and has precision machined and hardened steel gears. It features a safety lock throttle and a side handle for better control. The spindle has a thread of 3/8x24 and has a free speed of 11,000 rpm. Air consumption is 4 CFM at 90 PSI. Grinding wheel not included.
Product Description
11,000 rpm free speed; 1/2 HP; 1/4" air inlet; 90 psi; 4 cfm air consumption; 3/8" - 24 spindle thread; Heavy-duty ball bearing construction for vibration-free performance; Durable precision machined and hardened steel gears; Rugged aluminum alloy housing with steel wheel guards; Features safety lock throttles and dead handles; Grinding wheel not included