... No load Speed 3,500~15,000r.p.m Output:2.5~35W Models RK-510(3429),, Carbon brush dc ... )NominalSpeedCurrentSpeedCurrentTorqueOutputEffVr.p.mAr.p.mAg.cmW%g.cmRK-510-231506.0 ~ 15.012.09,2500.1667,7000.8392.57.3173 ... .8550RK-510-221706.0 ~ 15.012.08,3400.1276,9920.6677.95.5970.9480RK-510-211807.2 ~ 24 ... ~ 3024.07,5800.0906,1670.4094.35.9761.6517RK-510-1256512.0 ~ 3024.05,1400.0554,1370.2277.13 ...