Machine-Your-Own 5C Collets
These collets tightly grip workpieces when installed into a 5C collet chuck or holder. 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 and internal threads.
Brass is recommended for holding soft and delicate workpieces.
For technical drawings and 3-D models, click on a part number.
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 |
Machine-Your-Own 16C Collets
Insert into a 16C collet chuck or holder to tightly 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 and internal threads.
For technical drawings and 3-D models, click on a part number.
| Max. Bore Dia. | Body Dia. | Overall Lg. | Face Pilot Hole Dia. | Internal Thread Size | External Thread Size | External Thread Pitch | Material | Each | |
| 1 5/8" | 1.89" | 4 1/4" | 1/16" | 1 11/16"-20 | M47.5 | 1.75mm | Hardened Steel | 00000000 | 0000000 |
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 |
Large-Diameter Machine-Your-Own 5C Collets
Also known as step collets, their wide head can be machined to hold large workpieces that won't fit in a standard collet. They have external threads.
For technical drawings and 3-D models, click on a part number.
| Head Dia. | Head Thick. | Max. Bore Dia. | Body Dia. | Overall Lg. | Face Pilot Hole Dia. | External Thread Size | Material | Head Material | Each | |
| 2" | 1 3/16" | 1 1/2" | 1 1/4" | 4 33/64" | 1/2" | 1.238"-20 | Hardened Steel | Steel | 0000000 | 000000 |
| 3" | 1 3/16" | 2 1/2" | 1 1/4" | 4 33/64" | 1/2" | 1.238"-20 | Hardened Steel | Steel | 0000000 | 00000 |
| 4" | 1 3/16" | 3 1/2" | 1 1/4" | 4 33/64" | 1/2" | 1.238"-20 | Hardened Steel | Steel | 0000000 | 000000 |
| 5" | 1 3/16" | 4 1/2" | 1 1/4" | 4 33/64" | 1/2" | 1.238"-20 | Hardened Steel | Steel | 0000000 | 000000 |
| 6" | 1 3/16" | 5 1/2" | 1 1/4" | 4 33/64" | 1/2" | 1.238"-20 | Hardened Steel | Steel | 0000000 | 000000 |