System of Measurement System of Measurement |
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Size Size |
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Grip Range Grip Range |
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Collet Type Collet Type |
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 | ER-25 |
For Holding For Holding |
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Face Type Face Type |
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 | Round |
For Use With For Use With |
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Overall Length Overall Length |
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Approximate Diameter Compression Approximate DiameterCompression |
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Material Material |
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Maximum Body Diameter Maximum Body Diameter |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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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.
| 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 |