Standard and Metric Counterbore Tools With Pilots

  • Standard Socket Head Cap Screw C-Bore Diameters for: #10 - 3/4
  • Standard Socket Head Cap Screw C-Bore Diameters for: M6 - M20
Standard & Metric Piloted C-Bore.png
  • - Cuts a Flat Counterbore within .001
  • - Integral Pilot for Manual Applications
Piloted C-Bore Tool Drawing.png
Tool Info.
Standard Piloted Conterbore Tools
Tool # S.H.C.S. Size Flutes D D-1 L L-1 L-2 S Insert Screw Wrench
CB-359 #10 1 .359 .215 3.250 .250 1.000 .500 SDEB-1511CB 164T T-6
CB-406 1/4 1 .406 .280 3.250 .250 1.000 .500 SPEB-221CB 300T T-8
CB-500 5/16 1 .500 .342 3.500 .312 1.187 .500
CB-594 3/8 2 .594 .405 3.625 .312 1.312 .500
CB-687 7/16 2 .687 .467 3.750 .375 1.375 .500
CB-781 1/2 2 .781 .530 4.000 .375 1.625 .750 SPEB-221CB 314T T-8
CB-1000 5/8 2 1.000 .655 4.125 .500 1.625 .750
CB-1187 3/4 2 1.187 .812 4.250 .500 1.750 .750
Tool Info.
Metric Piloted Counterbore Tools
Tool # S.H.C.S. Size Flutes D D-1 L L-1 L-2 S Insert Screw Wrench
CB-11MM M-6 1 .433 .258 3.250 .250 1.000 .500 SPEB-221CB 300T T-8
CB-15MM M-8 2 .590 .352 3.625 .312 1.312 .500
CB-18MM M-10 2 .709 .431 3.750 .375 1.375 .500
CB-20MM M-12 2 .787 .549 4.000 .375 1.625 .750 SPEB-221CB 314T T-8
CB-24MM M-14 2 .945 .588 4.125 .500 1.625 .750
CB-26MM M-16 2 1.023 .667 4.250 .500 1.750 .750
CB-33MM M-20 2 1.298 .824 4.250 .500 1.750 .750

Insert Info.

SPEB / SDEB - Chipbreaker Illustration.png
Insert Info.
Standard & Metric Piloted C-Bore Tool
Insert # I.C. T R Grades
SDEB-1511CB .187 .082 .015 X33 / X40
SPEB-221CB .250 .125 .015 X33 / X40

Technical Data

Speed and Feed Info.
Piloted Standard & Metric C-Bore Tools
Material S.F.M. .359 - .500 Dia.
I.P.T.
.590 - 1.298 Dia.
I.P.T.
Mild & Low Carbon Steel
Ex. 1018, 1020, 1117, 1141, 12L14
800 - 1200 .001 - .002 .002 - .003
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620
500 - 800 .001 - .002 .002 - .003
Lower Carbon Tool Steel
Ex. P-20, H-13, S-7
400 - 700 .001 - .002 .002 - .003
Tool Steel
Ex. A-2, A-6, D-2, M-2
300 - 600 .001 - .002 .002 - .003
Stainless Steel
Ex. 304, 316, 420, 15-5PH, 17-4PH
300 - 600 .001 - .002 .002 - .003
Iron
Ex. Cast, Ductile, Nodular
600 - 1000 .001 - .002 .002 - .003
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V
120 - 180 .001 - .002 .001 - .002
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass
1000 - 2500 .001 - .002 .002 - .003
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 X33
Iron Ductile X33
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V X33
Non-Ferrous Metals Aluminum, Bronze, Brass X40 / X33
Insert Grade Description
Grade Description
X33 High Performance Nitride Coating
X40 Extremely Smooth Boride Coating
KTOOLINC LOGO.png