Solid Carbide Reamers Recommended Cutting Conditions DRC Series (Internal Coolant) Drill Diameter Ø3-6mm Ø6.1~10mm Ø10.1-12mm Work Material Hardness Vc Feed Vc Feed Vc Feed(m/min)(mm/rev)(m/min)(mm/rev)(m/min)(mm/rev) Mild Steel (<180HB) 40~70 0.1~0.2 40~70 0.1~0.24 40~70 0.1~0.3 P Cabon Steel (180~280HB) 25~50 0.1~0.2 25~50 0.1~0.24 25~50 0.1~0.3 Alloy Steel (280~350HB) 15~25 0.08~0.16 15~25 0.08~0.2 15~25 0.08~0.24 M Stainless Steel (<200HB) 8~15 0.08~0.16 8~15 0.08~0.18 8~15 0.08~0.2 Cast lron (<350Mpa) 35~60 0.1~0.32 35~60 0.1~0.36 35~60 0.1~0.4 K Ductile Cast lron (<450Mpa) 20~45 0.1~0.24 20~45 0.1~0.28 20~45 0.1~0.32 Aluminum <12% Si - 110~195 0.12~0.32 110~195 0.12~0.36 110~195 0.12~0.4 N Aluminum >12% Si - 105~180 0.12~0.32 105~180 0.12~0.36 105~180 0.12~0.4 S Heat Resistant Alloy - 8~15 0.08~0.16 8~15 0.08~0.18 8~15 0.08~0.2 H Hardened Material - - - - - - - DRN Series (External Coolant) Drill Diameter Ø3-6mm Ø6.1~10mm Ø10.1-12mm Work Material Hardness Vc Feed Vc Feed Vc Feed(m/min)(mm/rev)(m/min)(mm/rev)(m/min)(mm/rev) Mild Steel (<180HB) 10~20 0.03~0.12 10~20 0.06~0.2 10~20 0.1~0.22 P Cabon Steel (180~280HB) 10~16 0.03~0.12 10~16 0.06~0.2 10~16 0.1~0.22 Alloy Steel (280~350HB) 8~12 0.03~0.12 8~12 0.06~0.2 8~12 0.1~0.22 M Stainless Steel - - - - - - - Cast lron (<350Mpa) 8~16 0.03~0.12 8~16 0.06~0.02 8~16 0.1~0.22 K Ductile Cast lron (<450Mpa) 8~16 0.03~0.12 8~16 0.06~0.02 8~16 0.1~0.22 Aluminum <12% Si - 20~30 0.03~0.13 20~30 0.07~0.23 20~30 0.1~0.28 N Aluminum >12% Si - 20~30 0.03~0.13 20~30 0.07~0.23 20~30 0.1~0.28 S Heat Resistant Alloy - - - - - - - H Hardened Material - - - - - - - B093