ER-25 Collets
Shown with Drill Bit (Not Included)
Use these collets in milling machines that have an ER-25 collet chuck. With a round face and adjustable body, they compress to grip round-shank drill bits, end mills, reamers, and taps.
To ensure they work with milling machines and tooling made throughout the world, these collets meet both ISO and DIN dimensional standards.
| Collet Size | Grip Range | Workpiece Dia. Tolerance | Max. Body Dia. | Approximate Dia. Compression | Overall Lg. | Material | Specifications Met | Each | |
Round | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/16" | 0.047"-0.063" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 000000 |
| 3/32" | 0.078"-0.094" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 1/8" | 0.109"-0.125" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 5/32" | 0.125"-0.156" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 3/16" | 0.156"-0.187" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 7/32" | 0.187"-0.219" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 1/4" | 0.219"-0.250" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 9/32" | 0.250"-0.281" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 5/16" | 0.281"-0.312" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 11/32" | 0.312"-0.344" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 3/8" | 0.344"-0.375" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 13/32" | 0.375"-0.406" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 7/16" | 0.406"-0.437" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 15/32" | 0.437"-0.469" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 1/2" | 0.469"-0.500" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 17/32" | 0.500"-0.531" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 9/16" | 0.531"-0.563" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 19/32" | 0.563"-0.594" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
| 5/8" | 0.594"-0.625" | -0.0001" to 0.0001" | 1.03" | 1/32" | 1.38" | Hardened Steel | DIN 6499, ISO 15488B | 0000000 | 00000 |
Collet Chucks
CAT 40 Taper
Securely hold collets in the spindle of a milling machine.
Use a nut wrench (sold separately) to tighten the chuck nut and secure the tool bit in the collet.
For technical drawings and 3-D models, click on a part number.