Indexable Counterbore Tools
| Part No. | A | B | L1 | L2 | L3 | Pre-Drilled Hole | Spare Parts |
|---|---|---|---|---|---|---|---|
| CB0625 | 0.625 | 0.750 | 0.697 | 1.130 | 3.630 | 0.137 | A |
| CB0687 | 0.687 | – | 0.697 | 1.130 | 3.630 | 0.199 | A |
| CB0750 | 0.750 | – | 0.697 | 1.130 | 3.630 | 0.262 | A |
| CB0812 | 0.812 | – | 0.697 | 1.130 | 3.630 | 0.324 | A |
| CB0875 | 0.875 | – | 0.697 | 1.130 | 3.630 | 0.386 | A |
| CB0937 | 0.937 | – | 0.697 | 1.130 | 3.360 | 0.448 | A |
| RCB1000 | 1.000 | – | 0.741 | 1.375 | 3.880 | 0.212 | C |
| RCB1062 | 1.062 | – | 0.857 | 1.500 | 4.000 | 0.274 | C |
| RCB1125 | 1.125 | 1.000 | 0.980 | 1.625 | 4.130 | 0.337 | C |
| RCB1187 | 1.187 | – | 1.103 | 1.750 | 4.250 | 0.399 | C |
| RCB1250 | 1.250 | – | 1.219 | 1.875 | 4.380 | 0.462 | C |
| RCB1312 | 1.312 | – | 1.340 | 2.000 | 4.500 | 0.524 | C |
| RCB1375 | 1.375 | 1.250 | 1.460 | 2.125 | 5.130 | 0.587 | C |
| RCB1437 | 1.437 | – | 1.581 | 2.250 | 5.250 | 0.649 | D |
| RCB1500 | 1.500 | – | 1.583 | 2.375 | 5.380 | 0.357 | D |
| RCB1562 | 1.562 | – | 1.957 | 2.750 | 5.750 | 0.419 | D |
| RCB1625 | 1.625 | – | 2.076 | 2.875 | 5.880 | 0.482 | D |
| RCB1687 | 1.687 | – | 2.200 | 3.000 | 6.000 | 0.544 | D |
| RCB1750 | 1.750 | 1.500 | 2.448 | 3.250 | 6.250 | 0.607 | D |
| RCB1812 | 1.812 | – | 2.815 | 3.625 | 6.630 | 0.669 | D |
| RCB1875 | 1.875 | – | 2.828 | 3.750 | 6.750 | 0.298 | E |
| RCB1937 | 1.937 | – | 3.200 | 4.125 | 7.130 | 0.361 | E |
| RCB2000 | 2.000 | – | 3.234 | 4.250 | 7.250 | 0.424 | E |
| RCB2062 | 2.062 | – | 3.573 | 4.500 | 7.500 | 0.485 | E |
| RCB2125 | 2.125 | – | 3.822 | 4.750 | 7.750 | 0.548 | E |
| RCB2187 | 2.187 | – | 4.005 | 4.937 | 7.940 | 0.611 | E |
| RCB2250 | 2.250 | – | 4.132 | 5.060 | 8.060 | 0.674 | E |
| Part No. | A MM |
Dia. (Inch) |
B | L1 | L2 | L3 | Pre-Drilled Hole | Spare Parts |
|---|---|---|---|---|---|---|---|---|
| CB1600MM | 16.00 | 0.630 | 0.750 | 0.697 | 1.130 | 3.630 | 0.142 | A |
| CB1725MM | 17.25 | 0.679 | – | 0.697 | 1.130 | 3.630 | 0.191 | A |
| CB1800MM | 18.00 | 0.709 | – | 0.697 | 1.130 | 3.630 | 0.202 | A |
| CB1925MM | 19.25 | 0.758 | – | 0.697 | 1.130 | 3.630 | 0.270 | A |
| CB2000MM | 20.00 | 0.787 | – | 0.697 | 1.130 | 3.630 | 0.299 | A |
| CB2200MM | 22.00 | 0.866 | – | 0.818 | 1.250 | 3.750 | 0.378 | A |
| CB2225MM | 25.00 | 0.987 | – | 0.818 | 1.250 | 3.750 | 0.496 | A |
| CB2800MM | 28.00 | 1.120 | 1.000 | 0.947 | 1.500 | 4.000 | 0.313 | C |
| CB3000MM | 30.00 | 1.181 | – | 1.071 | 1.625 | 4.120 | 0.392 | C |
| CB3150MM | 31.50 | 1.240 | – | 1.194 | 1.750 | 4.250 | 0.451 | C |
| CB3200MM | 32.00 | 1.260 | – | 1.317 | 1.875 | 4.370 | 0.471 | C |
| CB3500MM | 35.00 | 1.378 | 1.250 | 1.440 | 2.000 | 5.000 | 0.589 | C |
| CB3750MM | 37.50 | 1.476 | – | 1.565 | 2.125 | 5.120 | 0.688 | C |
| CB3800MM | 38.00 | 1.496 | – | 1.579 | 2.375 | 5.370 | 0.351 | D |
| CB4000MM | 40.00 | 1.575 | – | 1.831 | 2.624 | 5.620 | 0.430 | D |
| CB4200MM | 42.00 | 1.654 | – | 2.071 | 2.875 | 5.870 | 0.509 | D |
| CB4500MM | 45.00 | 1.772 | 1.500 | 2.317 | 3.000 | 6.120 | 0.627 | D |
| CB4750MM | 47.50 | 1.870 | – | 2.722 | 3.750 | 6.750 | 0.292 | E |
| CB4800MM | 48.00 | 1.890 | – | 2.912 | 3.937 | 6.940 | 0.312 | E |
| CB5000MM | 50.00 | 1.969 | – | 3.088 | 4.125 | 7.120 | 0.391 | E |
| CB5200MM | 52.00 | 2.047 | – | 3.274 | 4.312 | 7.310 | 0.470 | E |
| CB5500MM | 55.00 | 2.165 | – | 3.548 | 4.500 | 7.500 | 0.588 | E |
| CB5650MM | 56.50 | 2.224 | – | 3.634 | 4.687 | 7.680 | 0.647 | E |
| CB6000MM | 60.00 | 2.362 | – | 3.700 | 4.750 | 7.750 | 0.785 | E |
Spare Parts
| Part No. | Insert No. | Screw No. | Wrench |
| A | CPMT 21.51 | MS-1023 | FT-7 |
| C | TCMT 21.51 | MS-1023 | FT-7 |
| D | TCMT 32.52 | MS-1155 | FT-15 |
| E | TCMT 432 | MS-1158 | FT-15 |
| Material | SFM | IPT |
| Carbon/Alloy steels up to 200 BHN | 400 to 600 | 0.003 to 0.005 |
| Hardened Steels up to 350 BHN | 300 to 500 | 0.003 to 0.005 |
| Cast Iron | 300 to 500 | 0.005 to 0.010 |
| Brass/Bronze | 300 to 800 | 0.005 to 0.010 |
| Aluminum | 400 to 1000 | 0.005 to 0.010 |
Use the following formula to determine RPM and IPM
Feed IPM = L x T x R
RPM = (4C)/D
C = Surface Speed
D = Diameter of Cutter
*T = Number of Inserts
R = RPM
* The counterbore tools are (2) effective, while the center cutting tools are only (1) effective.
The speeds and feeds are starting parameters. Listen to the machine and watch for insert wear. If your machine and/or fixture is not rigid, decrease chip load. If you see insert chipping, increase surface speed and/or decrease chip load.