Insert Grade & Screw Technical Data

Insert Grade & Selection Info

Insert Grade Selection
Material Material Examples Preferred Grades
High & Low Carbon Steels 1018, 1020, 1117, 1141, 12L14 X33 / A10M
High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 X33 / A10M
Lower Carbon Tool Steels P-20, H-13, S-7 X33 / A10M
Tool Steels A-2, A-6, D-2, M-2 X33 / A10M
Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH X33 / A10M
Iron Cast, Nodular C55
Iron Ductile X33
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V X33 / A10M
Non-Ferrous Metals Aluminum, Bronze, Brass X40 / B1M / X33
 
Insert Grade Selection
Spot Drills Only
Material Material Examples Preferred Grades
High & Low Carbon Steels 1018, 1020, 1117, 1141, 12L14 A1M
High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 A1M
Lower Carbon Tool Steels P-20, H-13, S-7 A1M
Tool Steels A-2, A-6, D-2, M-2 A1M
Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH A1M
Iron Cast, Nodular A1M
Iron Ductile A1M
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V A1M
Non-Ferrous Metals Aluminum, Bronze, Brass B1M / A1M
Insert Grade Info.
Grade Description Primary Use
B1M Uncoated Carbide - No Hone Plastic & Non Ferrous: Aluminum, Brass, Bronze
A1M TIN Coated General Purpose Grade (Spot Drill Inserts Only)
A10M TIALN / TIN Coated Carbide / Wear Resistant Grade General Purpose Grade
C55 Multi-Layer Power Nitride Coating Cast Iron
X33 High Performance Nitride Coating General Purpose Grade
X40 Extremely Smooth Boride Coating - No Hone Aluminum & Non-Ferrous Metal
  • To get the optimum life out of your inserts and maximize the efficiency of your cutter contact K-Tool, Inc. tech support for specific speed & feed recommendations based on your application.

Insert Screw Information

  • Insert screws are a very important part of the performance of indexable cutting tools.Insert screws are also the most overlooked when the tool or insert performance drops off. Worn or damaged screws can cause the inserts to seat incorrectly in the pocket. This condition can cause vibration, chatter, incorrect cutting diameters, poor finish, insert failure or even tool failure.
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Important: Apply anti-seize to the screw threads and the bottom of the screw head

Insert Screw Specifications
Screw # Thread Wrench Recommended
Screw Torque
Max
Screw Torque
164T 1 - 64 T-6 2.7 - 3.3 In. Lb. 5.5 In. Lb.
300T 3 - 48 T-8 5.7 - 6.8 In. Lb. 11.3 In. Lb.
314T 3 - 48 T-8 5.7 - 6.8 In. Lb. 11.3 In. Lb.
414T 4 - 40 T-10 10 - 11.9 In. Lb. 19.9 In. Lb.
438T 4 - 40 T-10 10 - 11.9 In. Lb. 19.9 In. Lb.
538T 5 - 40 T-10 10 - 11.9 In. Lb. 19.9 In. Lb.
560T 5 - 40 T-10 10 - 11.9 In. Lb. 19.9 In. Lb.
5625T 5 - 40 T-10 10 - 11.9 In. Lb. 19.9 In. Lb.
614T 6 - 32 T-15 15.3 - 18.3 In. Lb. 30.5 In. Lb.
638T 6 - 32 T-15 15.3 - 18.3 In. Lb. 30.5 In. Lb.
838T 8 - 32 T-20 22.8 - 27.4 In. Lb. 45.6 In. Lb.
1012T 10 - 32 T-25 33.6 - 40.4 In. Lb. 67.3 In. Lb.
1412T 1/4 - 28 5/32 Allen 77.4 - 92.9 In. Lb. 154.9 In. Lb.
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