ER Collet Ultra High Precision 0.005mm / 5u run-out. These are not your blue/yellow boxed collets that are the cheapest of cheapest of collets that do not specify a precision value. A high precision collet allows for quieter machining, longer tool life and greater cut accuracy.
Available in ER11, ER16, ER20 and ER25 in common sizes 3.175mm (1/8"), 4mm, 6mm, 6.35mm (1/4"), 8mm, 10mm and 12.7mm (appropriate to ER size). Clamping range is that of nominal inner diameter size -1mm (eg. 6mm would accept 5mm to 6mm).
How to check what diameter you have
| ER Collet | Length | Diameter | Range |
|---|---|---|---|
| ER-11 | 18 mm | 11.5 mm | 0.5—7 mm |
| ER-16 | 27.5 mm | 17 mm | 0.5—9 mm |
| ER-20 | 31.5 mm | 21 mm | 1—13 mm |
| ER-25 | 34 mm | 26 mm | 1—16 mm |
| ER-32 | 40 mm | 33 mm | 1—21 mm |
| ER-40 | 46 mm | 41 mm | 3—26 mm |
8 Reviews Hide Reviews Show Reviews
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ER20 collet
As always Adam’s bits have never let me down and the price a very competitive.
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ER20 Collets
I have bought a number of end mills from Adam’s Bits and every time I was impressed with the quality as well as how fast the delivery was. I use these on my YouTube channel (https://youtube.com/@TwinSummitDesigns) and I would highly recommend them.
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ER20 Collet
Item as described, fast post - recommended
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Adams Bits are the best
Once again, a great product without a heavy price.
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ER 20 Collet Ultra High Precision
I bought the 6mm set and they seem to be working fine, no issues found so far.
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ER20 Collets
Excellent quality, run much smoother and quieter than the ones we had. Has a smoother and better clamping power.
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ER20 Collet's
Excellent quality, tooling bits fit so much better and clamping is more even. Great purchase.
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WR20 collets
Super fast delivery I am super impressed. Product looks great.
