| Tube I.D. | Carbide Drill | |
|---|---|---|
| mm | inch | |
| 6.4 | 1/4 | CB-250 |
| 9.5 | 3/8 | CB-375 |
| 11.1 | 7/16 | CB-430 |
| 12.7 | 1/2 | CB-500 |
| 14.3 | 9/16 | CB-560 |
| 15.9 | 5/8 | CB-625 |
| 17.5 | 11/16 | CB-680 |
CARBIDE DRILLS are used for cleaning tubes choked solidly with hard deposits.
| Tube I.D. | Carbide Drill | |
|---|---|---|
| mm | inch | |
| 19.1 | 3/4 | CB-750 |
| 22.2 | 7/8 | CB-875 |
| 25.4 | 1 | CB-1000 |
CARBIDE DRILLS are used for cleaning tubes choked solidly with hard deposits.