Spindle speed: 3,450 rpm. 65014 2" x 36" (51 mm x 914 mm) Electric Tool Post Grinder 2 hp, 3,450 RPM,, 230 V (AC), 1 Phase, 60 Hz, 4,500 SFPM Mounts to Standard Lathes, for Applications from to Superfinishing. ... surface grinding machine RCK 1270. : 1,200 rpm - 1,800 rpm. provides high performance in your simple and complex operations.