Helical Chamfer Mill Tech Support

A drill bit bit attached to a power drill.
MaterialRockwell HardnessUncoated Speed (SFM)AlTiN+ Coated Speed (SFM)
Feed (IPT) for Calculated Cutting Diameter <0.125
Feed (IPT) for Calculated Cutting Diameter .125-.1875
Feed (IPT) for Calculated Cutting Diameter .1875-250
Feed (IPT) for Calculated Cutting Diameter .250-.3125
Feed (IPT) for Calculated Cutting Diameter .3125-.375
Feed (IPT) for Calculated Cutting Diameter .375-.500
Feed (IPT) for Calculated Cutting Diameter .500-.625
Feed (IPT) for Calculated Cutting Diameter .625-.750
Gray Cast Iron85Rb2504500.00120.00220.00350.00450.00500.00550.00700.0090
Ductile Cast Iron85Rb1803750.00070.00150.00200.00280.00350.00400.00550.0070
Carbon Steel18Rc2254500.00070.00150.00220.00280.00350.00450.00550.0070
Alloy Steel20Rc2004000.00060.00120.00200.00250.00300.00400.00500.0060
Heat Treated Alloys40Rc1002000.00030.00070.00100.00120.00180.00200.00280.0035
Tool Steel20Rc1503250.00060.00100.00180.00220.00280.00350.00450.0055
300 Stainless Steel80Rb1202500.00050.00090.00150.00180.00220.00280.00350.0045
400 Stainless Steel95Rb1403250.00040.00090.00120.00180.00220.00250.00350.0045
Nickel Alloy20Rc1201750.00050.00090.00120.00180.00220.00280.00350.0045
Cobalt Alloy20Rc1402250.00030.00060.00090.00120.00150.00180.00220.0030
Titanium25Rc1602500.00050.00090.00120.00180.00220.00280.00350.0045
Aluminum60Rb100019000.00100.00280.00400.00550.00700.00800.01100.0130
Brass, Zinc, Copper41Rb3206000.00080.00150.00220.00300.00400.00450.00600.0080