.500 - 1.187 Dia. Back Counterbore Tools

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- Counterbore without moving your part

- Easy to program and use :

  1. Offset tool
  2. Enter hole
  3. Return to center
  4. Plunge Counterbore to depth
  5. Retract from cut
  6. Offset tool
  7. Exit part

Back Counterbore Demonstration Video

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Coolant thru can be added to any BCB in 2 - 3 working days

Tool Info.
.500 - 1.187 Dia. Back Counterbore Tool
Tool # S.H.C.S. Size Flutes D L L-1 D.O.C S Insert Screw Wrench
BCB-500 .313 1 .500 2.937 1.187 .750 .500 SPEB-1511CB 164T T-6
BCB-594 .375 1 .594 2.937 1.187 .750 .500
BCB-687 .438 1 .687 3.625 1.625 1.000 .750 SPEB-221CB 300T T-8
BCB-781 .500 1 .781 3.812 1.812 1.250 .750 SPEB-221CB 314T T-8
BCB-1000 .625 1 1.000 4.562 2.312 1.625 1.000
BCB-1187 .750 1 1.187 4.812 2.562 1.937 1.000
Tool # Min. Existing
Hole Diameter
Offset to
Enter Hole
BCB-500 .320 .100
BCB-594 .390 .110
BCB-687 .450 .120
BCB-781 .510 .135
BCB-1000 .640 .180
BCB-1187 .800 .195

Insert Info.

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Insert Info.
.500 - 1.187 Back Counterbore Tool
Insert # I.C. T R Grades
SPEB-1511CB .187 .082 .015 X33 / X40
SPEB-221CB .250 .125 .015 X33 / X40

Technical Data

Speed and Feed Info.
.500 - 1.187 Back CounterBore Tool
Material S.F.M. I.P.R.
Mild & Low Carbon Steel
Ex. 1018, 1020, 1117, 1141, 12L14
800 - 1200 .002 - .003
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620
500 - 800 .002 - .003
Lower Carbon Tool Steel
Ex. P-20, H-13, S-7
400 - 700 .002 - .003
Tool Steel
Ex. A-2, A-6, D-2, M-2
300 - 600 .001 - .003
Stainless Steel
Ex. 304, 316, 420, 15-5PH, 17-4PH
300 - 600 .001 - .002
Iron
Ex. Cast, Ductile, Nodular
600 - 1000 .002 - .003
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V
120 - 180 .001 - .002
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass
1000 - 2500 .002 - .004
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
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