37.5° Multi-Purpose Chamfer Mills

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  • - Uses High Shear Positive Top Inserts
  • - Free Cutting
  • - Excellent Part Finish
  • - Several Insert Grades Available
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Tool Info.
37.5° Multi-Purpose Chamfer Mills
Tool # Angle Flutes D D-1 D-2 D-3 L L-1 B S Screw Wrench Insert
A-3750 37.5° 2 1.625 1.090 .980 .320 3.250 1.250 .438 .750 638T T-15 SPEB-432PA
A-3775 37.5° 2 2.250 1.420 1.300 .250 3.750 1.500 .688 1.000 1012T T-25 SPEB-6352PA

Insert Info.

K-Tool, Inc.  Positive Top Insert Illustration
Insert Info.
37.5° Multi-Purpose Chamfer Mills
Insert # I.C. T R Grades
SPEB-432PA .500 .187 .031 B1M / X33 / X40 / C55
SPEB-6352PA .750 .220 .031 X33 / X40 / C55

Technical Data

Speed and Feed Info.
Multi-Purpose Chamfer Mill
Material S.F.M. I.P.T.
Mild & Low Carbon Steel
Ex. 1018, 1020, 1117, 1141, 12L14
800 - 1200 .003 - .007
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620
500 - 800 .002 - .006
Lower Carbon Tool Steel
Ex. P-20, H-13, S-7
400 - 700 .002 - .006
Tool Steel
Ex. A-2, A-6, D-2, M-2
300 - 600 .002 - .006
Stainless Steel
Ex. 304, 316, 420, 15-5PH, 17-4PH
300 - 600 .002 - .006
Iron
Ex. Cast, Ductile, Nodular
600 - 1000 .004 - .008
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V
120 - 180 .001 - .003
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass
1000 - 2500 .004 - .010
Insert Grade Selection
Material Material Examples Preferred Grade
High & Low Carbon Steels 1018, 1020, 1117, 1141, 12L14 X33
High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 X33
Lower Carbon Tool Steels P-20, H-13, S-7 X33
Tool Steels A-2, A-6, D-2, M-2 X33
Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH X33
Iron Cast, Nodular C55 / X33
Iron Ductile X33
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V X33
Non-Ferrous Metals Aluminum, Bronze, Brass X40 / B1M / X33
Insert Grade Description
Grade Description
B1M Uncoated Carbide - No Hone
C55 Multi-Layer Power Nitride Coating
X33 High Performance Nitride Coating
X40 Extremely Smooth Boride Coating
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