Machine-Your-Own Inside-Grip 5C Collets
The head on these collets acts like a mandrel to support the inside of a hollow workpiece. An expanding screw widens the head to firmly grip the workpiece. It can be machined to fit the exact ID of your part. All have external threads.
| Head Dia. | Head Thick. | Min. Machined Dia. | Body Dia. | Overall Lg. | External Thread Size  | TIR (Total Indicated Runout) Accuracy | Material | Each | |
| 1/2" | 1" | 0.25" | 1 1/4" | 4 1/2" | 1.234"-20 | 0.0005" | Steel | 0000000 | 000000 |
| 1" | 1" | 0.437" | 1 1/4" | 4 1/2" | 1.234"-20 | 0.0005" | Steel | 0000000 | 00000 |
| 1" | 2" | 0.437" | 1 1/4" | 5 1/2" | 1.234"-20 | 0.0005" | Steel | 0000000 | 000000 |
| 1 1/2" | 1" | 0.75" | 1 1/4" | 4 1/2" | 1.234"-20 | 0.0005" | Steel | 0000000 | 00000 |
| 1 1/2" | 1 1/2" | 0.75" | 1 1/4" | 5" | 1.234"-20 | 0.0005" | Steel | 0000000 | 000000 |
| 2" | 1" | 0.75" | 1 1/4" | 4 1/2" | 1.234"-20 | 0.0005" | Steel | 0000000 | 000000 |
| 2" | 1 1/2" | 0.75" | 1 1/4" | 5" | 1.234"-20 | 0.0005" | Steel | 0000000 | 000000 |
| 2 1/2" | 2 1/2" | 0.75" | 1 1/4" | 6" | 1.234"-20 | 0.0005" | Steel | 0000000 | 000000 |