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Indexable Boring Bar Feed and Speed Chart

Material HB/Rc Speed Range (SFM) Cutting Conditions
Uncoated ALTiN+ Max DOC
ACD & ATD
Max DOC
ATP
Feed
IPR
Cast Iron 160 HB 75-200 200-550 0.020 0.060 .0005-.010
Carbon Steel 18 Rc 75-200 200-450 0.018 0.060 .0005-.010
Alloy Steel 20 Rc 75-200 200-425 0.015 0.060 .0005-.010
Tool Steel 25 Rc 75-175 175-300 0.010 0.030 .0005-.010
300 Stainless Steel 150 HB 75-175 175-350 0.015 0.028 .0005-.010
400 Stainless Steel 195 HB 75-210 130-420 0.012 0.028 .0005-.010
High Temp Alloy
(Ni & Co Base)
20 Rc 50-130 130-300 0.008 0.020 .0005-.010
Titanium 25 Rc 50-120 120-275 0.009 0.022 .0005-.010
Heat Treated Alloys
(38-45 Rc)
40 Rc 50-100 100-200 0.005 0.010 .0005-.005
Aluminum 100 HB 75-250 250-750 0.025 0.095 .0005-.010
Brass, Zinc 80 HB 75-300 250-650 0.023 0.090 .0005-.010

SFM = Surface Feet per Minute

Starting parameters only. Length to diameter ratios, setup, and machine regidity may affect performance.
The max Depth Of Cut (DOC) acceptable at the minimum Inches Per Revolution (IPR).