Hole Finishing reaming toolsboring/fine-boring toolscountersinkingPCD Hole Finishing Tool Selection Guide engineered ⅷ first choice standard diameter solution diameter ࠗ alternate choice P M K N S H range accuracy range accuracy HSR™ — Solid CarbideHigh-Speed ReamerCarbideⅷ ⅷ ⅷ ⅷ ࠗ .196–.551"5–14mm IT7 .056–1.00"1,4–25,4mmIT6>.39">10mm.0004" .0003"10 μm7 μm HSR — Carbide TippedHigh-Speed ReamerCarbide/Cermetⅷⅷ ⅷ ⅷ ࠗ .551–1.26"14–32mm IT7 .551–2.55"14–65mm IT6 .0004" .0003"10 μm7 μm ROTAFLEX™ FBHBBFine-BoringCarbide/Cermet/PCD/CBNⅷⅷ ⅷ ⅷ ⅷ ࠗ .236–.866"6–22mm IT7 — — .0002"5 μm .0002–.0004"5–10 μm ROTAFLEX FBHFine-BoringCarbide/Cermet/PCD/CBNⅷⅷ ⅷ ⅷ ⅷ ࠗ .866–4.25"22–115mmIT7 — — .0002"5 μm .0002–.0004"5–10 μm ROTAFLEX TCHSRoughingCarbide/Cermet/PCD/CBNⅷ ⅷ ⅷ ⅷ ⅷ .886–4.52"22,5–115mmIT7 — — .0004"10 μm >.0008">20 μm ROTAFLEX Small Bridge ToolsRoughing ⅷ ⅷ ⅷ ⅷ ⅷCarbide/Cermet/PCD/CBN3.425–7.87"87–200mmIT7— — .0004"10 μm >.0008">20 μm ROTAFLEX Large Bridge ToolsRoughing ⅷ ⅷ ⅷ ⅷ ⅷCarbide/Cermet/PCD/CBN7.87–20.47"200–520mmIT7— — .0004"10 μm >.0008">20 μm Fine-Boring CartridgesFine-BoringCarbide/Cermet/PCD/CBNⅷࠗⅷ ⅷ ࠗ 3.425–20.47"87–520mmIT7 — — .0002"5 μm .0002–.0004"5–10 μm CountersinkingRound ToolsSteel Base ⅷ – – – IT7 .0004" .0004"10 μm10 μm Port CuttersCarbide/CermetSteel Base for standardⅷportsSAE, BSPP,– – IT7 .0004" .0004"10 μm10 μmISO PCDRound ToolsSteel Base CBN ⅷ – – .394–4.00"10–100mmIT6 .0004" .0004"10 μm10 μm PCDRound ToolsCarbide Base ⅷ – – .197–1.00"5–25mm IT6 .0002" .0003"5 μm7 μm Cylindricity Position NOTE: Process- and application-dependent. NOTE: Process- and application-dependent. Highly dependent on the pre-machine hole accuracy. Highly dependent on the pre-machine hole accuracy. Use of high-performance drilling/pre-machining tools Use of high-performance drilling/pre-machining tools mandatory to reach values. mandatory to reach values. W4 widia.com