Hole Finishing Tool Selection Guide capability achievable surface quality Ra required operator P M K N S H cost/part cycle time experience page(s) 20–40 μ-in 20–40 μ-in 20–60 μ-in0,5–1,0 μm 0,5–1,0 μm 0,5–1,5 μm–20–40 μ-in0,5–1,0 μm–ⅷⅷⅷ ⅷ moderate low low W8–W10,W13–W14 ⅷ ⅷ 20–40 μ-in 20–40 μ-in 20–60 μ-in0,5–1,0 μm 0,5–1,0 μm 0,5–1,5 μm–20–40 μ-in0,5–1,0 μm–ⅷⅷcarbide carbidemoderate low low W11–W12,W15–W16 only only 32–80 μ-in 32–80 μ-in 32–80 μ-in 32–80 μ-in 32–80 μ-in <48 μ-in0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm<1,2 μmⅷⅷⅷⅷlowmoderatelow–moderateW49–W51 32–80 μ-in 32–80 μ-in 32–80 μ-in 32–80 μ-in 32–80 μ-in <48 μ-in0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm<1,2 μmⅷⅷⅷⅷlowmoderatelow–moderateW52–W53 40–200 μ-in 40–200 μ-in 40–200 μ-in 40–80 μ-in 40–200 μ-in1,0–5,0 μm 1,0–5,0 μm 1,0–5,0 μm 1,0–2,0 μm 1,0–5,0 μm–ⅷⅷⅷⅷlowmoderate low–moderateW36–W37 40–200 μ-in 40–200 μ-in 40–200 μ-in 40–80 μ-in 40–200 μ-in1,0–5,0 μm 1,0–5,0 μm 1,0–5,0 μm 1,0–2,0 μm 1,0–5,0 μm–ⅷⅷⅷⅷlowlow low–moderateW38–W39 40–200 μ-in 40–200 μ-in 40–200 μ-in 40–80 μ-in 40–200 μ-in1,0–5,0 μm 1,0–5,0 μm 1,0–5,0 μm 1,0–2,0 μm 1,0–5,0 μm–ⅷⅷⅷⅷlowmoderate low–moderateW40–W45 32–80 μ-in 32–80 μ-in 32–80 μ-in 32–80 μ-in 32–80 μ-in0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm 0,8–2,0 μm–ⅷⅷࠗࠗlowmoderate low–moderateW46–W48 32–80μ-in 32–80μ-in 32–80μ-in 32–80 μ-in-2,0 μm-2,0 μm-2,0 μm0,8–2,0 μm––ⅷ ⅷ ⅷ ⅷ very low very low moderate W76–W77 32–80μ-in 32–80μ-in 32–80μ-in 32–80 μ-in-2,0 μm-2,0 μm-2,0 μm0,8–2,0 μm––ⅷ ⅷ ⅷ ⅷ very low very low moderate W74–W75 – – – 4–32 μ-in0,1–0,8 μm– – ⅷ ⅷ ⅷ ⅷ low very low moderate W80–W81 – – – 4–32 μ-in0,1–0,8 μm– – ⅷ ⅷ ⅷ ⅷ low very low moderate W80–W81 Ra Surface roughness NOTE: Surface roughness values are guidelines and depend on the application, coolant situation, machine, and cutting data applied. widia.com W5 Hole Finishing