GND Brochure 2023

Feed Rate f (IPR)

*Items in grey are not available

For face grooving, use cutting conditions closer to the lower limit of the recommended cutting conditions to ensure that chips are long. In cut-off applications, reduce the feed rate to around 30% to 50% near the center of the workpiece. GND Series - Recommended Cutting Conditions and Key Points

As there is less space for chip evacuation when machining internal diameters (particularly small bore diameters), ML/GL/GF chipbreakers are recommended. Modications to inserts and holders are required to perform machining such as radius grooving when using the RG chipbreaker with the GNDF holder for facing. ■ Recommended Cutting Conditions Recommended Cutting Conditions for GNDIS P36 Part Material P Carbon Steel / Alloy Steel M Stainless Steel K Cast Iron S Exotic Alloy N Non-ferrous Metal Insert Grades AC8035P AC830P AC8025P AC5015S AC520U T2500A AC8035P AC830P AC5015S AC520U AC5015S AC520U AC5015S AC520U AC425K AC8025P H10

AC5025S AC530U AC1030U

260 to 650 260 to 820

260 to 660 260 to 650 165 to 650 165 to 650 230 to 500 230 to 500 165 to 500 260 to 660 200 to 660

500 to 990 165 to 660 65 to 265 65 to 200

Cutting Speed v c (SFM)

MG ML RG CG/CF GA Feed (IPR) Feed (IPR) Feed (IPR) Feed (IPR) Feed (IPR) Feed (IPR) Feed (IPR) GG GL 3 .003 - .008 .001 - .006 .004 - .012 .002 - .008 .003 - .006 .003 - .010 .004 - .012 4 .004 - .010 .002 - .008 .006 - .014 .003 - .009 .004 - .008 .004 - .012 .006 - .014 5 .005 - .012 .003 - .010 .008 - .016 .004 - .010 .006 - .010 — .008 - .016 6 .006 - .014 .004 - .012 .008 - .018 .005 - .012 .008 - .012 — .008 - .018 7 .007 - .016 .005 - .014 .008 - .020 .006 - .014 .010 - .014 — — 8 .008 - .018 .006 - .016 .008 - .022 .007 - .016 .014 - .016 — — 2 — — .002 - .010 .001 - .006 — .002 - .008 .002 - .010 MG RG Feed (IPR) Depth (In.) Feed (IPR) Depth (In.) Feed (IPR) Depth (In.) ML 3 .003 - .010 .016 - .060 .002 - .007 .012 - .060 .004 - .016 .012 - .048 4 .004 - .012 .020 - .080 .002 - .008 .016 - .080 .006 - .018 .024 - .064 5 .005 - .014 .030 - .100 .003 - .010 .020 - .100 .008 - .020 .030 - .080 6 .006 - .016 .040 - .120 .004 - .012 .020 - .120 .012 - .024 .040 - .090 7 .007 - .016 .048 - .140 .005 - .014 .028 - .140 .014 - .026 .048 - .098 8 .008 - .018 .060 - .160 .006 - .016 .028 - .160 .014 - .028 .060 - .120

Chipbreaker

Grooving & Cutoff

Seat Size

Chipbreaker

Seat Size

Turning

■ Recommended Cutting Conditions CBN - BN7500

Feeds (IPM) Groove Traverse ap ≤ .020

Cutting Speed vc (SFM)

Part Material

General Sintered Alloy

250 - 800 250 - 600 250 - 600

.001 - .006 .001 - .003 .001 - .006

.003 - .008 .002 - .006 .002 - .008

High Density Sintered Alloy

CoCr - Cobalt Chrome

■ Key Points for Applications

Key Points for Facing

Precautions for Groove Expansion Recommended Chipbreakers MG ML GG GL GF GA

Holder Selection

Min. Bore Dia.

1 2 3 4 5

Max. Bore Dia.

Min. Bore Dia.

· Select a holder with which the outer diameter of the first groove to be machined is between the maximum and minimum grooving diameters of the holder. · If the machining start point is within the effective work diameter range, the work diameter will not be limited for subsequent passes.

· If the first groove is within the effective work diameter range during groove expansion via plunging, the work diameter will not be limited for subsequent passes.

Recommended Chipbreakers MG ML RN

Precautions for Traverse Cutting

Considering the rigidity of the holder, we recommend machining from the outside to the inside.

External Internal

Internal External

Feed Direction

Cutting Point

If machining is performed from the inner to the outer diameter, the wall thickness remaining on the principal force side will become thinner, reducing the rigidity of the holder.

· If the machining start point for traverse face cutting operation is within the effective work diameter range, the work diameter will not be limited for subsequent passes. · Select the lower limit of the recommended cutting conditions for the chipbreaker and lengthen the chips before evacuation. (In face grooving, broken chips easily get stuck in grooves, which causes problems.) · When breaking chips, step feed is required.

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