15° right helix spiral, 20°chamfer(standard) for high speed reaming. Standard H7 tolerance, special point & tolerance or corner radius available on demand. Speedy reaming Vc = 40 ~ 80m/min., f = 0.1mm/rev.per flute, Tine & TiAIN coated. Best combination if use with our standard YSD Solid carbide drill.

Company : "M" Automotive Applied Carbide Speedy Reamer : YSR120-R0.6 Kind of machine : Maching center, Vertical spindle Work-piece : SCM420H, EPS Pinion shaft, HRC27 ~ 31 (See reamed work-piece photo) Cutting speed : 1200prm, Vc =45m/min., f = 0.2mm/rev. Pre-drilling : Ø11.8mm, cut-off : 0.1mm(one side) Coolant : External soluble oil - Roundness : O = 1.80 - Roughness : Ra = 0.14 - Cycle time 650% increase