How to read this chart: find your handpiece in the left column, then read across to your bit's shank size. "Collet included" means that size ships with the handpiece. A SKU means you need that collet separately. "Adapter" means a step-down adapter that fits inside a collet you already have.
| Handpiece | 1/16" (1.6mm) |
3mm | 3/32" (2.35mm) |
1/8" (3.18mm) |
5/32" (4mm) |
3/16" (4.8mm) |
6mm | 1/4" (6.35mm) |
7/32" (5.5mm) |
Collet set |
|---|---|---|---|---|---|---|---|---|---|---|
| Three-jaw chuck handpieces (no collets needed) | ||||||||||
| H.30 | Yes | Yes | Yes | Yes | Yes | No | No | No | No | Not required |
| H.30-C2 | Yes | Yes | Yes | Yes | Yes | No | No | No | No | Not required |
| H.30H square drive | Yes | Yes | Yes | Yes | Yes | No | No | No | No | Not required |
| H.30SJ slip joint | Yes | Yes | Yes | Yes | Yes | No | No | No | No | Not required |
| Collet style handpieces | ||||||||||
| H.44T | Adapter HPL4-3233 or HPL4-3234 | HP448 | Collet included | Collet included | HP444 | HP445 | HP449 | Collet included | HP446 | HP440 |
| H.44T-E metric | Adapter HPL4-3233 or HPL4-3234 | Collet included | Collet included | HP443 | HP444 | HP445 | Collet included | HP447 | HP446 | HP440 |
| H.43T | Adapter HPL4-3233 or HPL4-3234 | HP448 | Collet included | Collet included | HP444 | HP445 | HP449 | Collet included | HP446 | HP440 |
| H.28 | HP602 | HP605 | Collet included | Collet included | No | No | No | No | No | HP600 |
| H.8 | HP602 | HP605 | Collet included | Collet included | No | No | No | No | No | HP600 |
| H.25 heavy duty | HP103116 | HP103124 | HP103115 | Collet included | HP103126 | HP103113 | HP103119 | Collet included | No | HP103000 |
| Quick change handpieces | ||||||||||
| H.10 | Adapter HPL4-3233 | HP001.014 | Collet included | No | No | No | No | No | No | — |
| H.18 | Adapter HPL4-3233 | No | Collet included | No | No | No | No | No | No | — |
| H.20 | Adapter HPL4-3233 | No | Collet included | No | No | No | No | No | No | — |
| Special use | ||||||||||
| H.50 | For use with chisels only | — | ||||||||
| H.15 | Hammer handpiece, for use with points only | — | ||||||||
| H.29 | For use with supplied NSK head only | — | ||||||||
| H.26 | For use with supplied NSK head only | — | ||||||||
Square drive (H.28H, H.43HT, H.44HT, H.25H) and slip joint (H.8SJ, H.28SJ, H.44TSJ, H.18SJ, H.20SJ) versions follow the same collet requirements as their standard counterparts. Duplex handpieces (H.8D, H.10D, H.18D, H.20D) also match their standard equivalents.
Collet adapters are not collets. They fit inside a collet you already have and let you use a smaller shank without swapping collets. They also work with micromotor handpieces. Five sizes: HPL4-3233 (3/32" to 1/16"), HPL4-3234 (1/8" to 1/16"), HPL4-3235 (3.0mm to 3/32"), HPL4-3236 (1/8" to 3/32"), HPL4-3237 (3.0mm to 1.6mm).
Before you fit a bit: measure the shank, check it is straight and undamaged, follow the manufacturer's speed rating, and always wear eye and dust protection.