3J Collets
When installed into a 3J collet chuck or holder, these collets securely grip round workpieces. They provide a stronger hold on small workpieces than a standard lathe chuck. All have external threads.
For technical drawings and 3-D models, click on a part number.
| Collet Size | TIR (Total Indicated Runout) Accuracy | Workpiece Dia. Tolerance | Body Dia. | Overall Lg. | External Thread Size  | Material | Each | |
Round | ||||||||
|---|---|---|---|---|---|---|---|---|
| 3/8" | 0.0008" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 000000 |
| 1/2" | 0.0011" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
| 5/8" | 0.0011" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
| 3/4" | 0.0015" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
| 7/8" | 0.0015" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
| 1" | 0.0015" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
| 1 1/8" | 0.0015" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
| 1 1/4" | 0.0015" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
| 1 1/2" | 0.0015" | -0.004" to 0" | 2" | 3 3/4" | 1.988"-20 | Steel | 00000000 | 00000 |
Machine-Your-Own 3J Collets
When installed into a 3J collet chuck or holder, these collets can securely grip workpieces. Also known as emergency collets, their machinable face allows you to bore an opening to exactly the size and shape you need. All have external threads.
For technical drawings and 3-D models, click on a part number.
| Max. Bore Dia. | Body Dia. | Overall Lg. | Face Pilot Hole Dia. | External Thread Size | Material | Each | |
| 1 3/4" | 2" | 3 3/4" | 1/16" | 1.988"-20 | Hardened Steel | 00000000 | 0000000 |