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 K11 / X33 / A10M
High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 K11 / X33 / A10M
Lower Carbon Tool Steels P-20, H-13, S-7 K11 / X33 / A10M
Tool Steels A-2, A-6, D-2, M-2 K11 / X33 / A10M
Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH K11 / X33 / A10M
Iron Cast, Nodular D66 / C55
Iron Ductile K11 / X33
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V K11 / X33 / A10M
Non-Ferrous Metals Aluminum, Bronze, Brass K22 / X40 / B1M / K11 / X33
Insert Grade Info.
Grade Description Primary Use
A1M TIN Coated General Purpose Grade (Spot Drill Inserts Only)
B1M Uncoated Carbide - No Hone Plastic & Non Ferrous: Aluminum, Brass, Bronze
D66 Multi-Layer Dense Coating Cast Iron
K11 Universal High Performance Dense Coating General Purpose Grade
K22 Ultra Smooth Dense Coating Aluminum & Non-Ferrous Metal
The following grades will be replaced as stock is depleted
C55 Replaced with D66 Cast Iron
X33 Replaced with K11 General Purpose Grade
A10M General Purpose Grade
X40 Replaced with K22 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.

K-Tool, Inc Standard Tools

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