Selecting the right spindle-to-tool connection
| Type | Runout (at 4xD) | Max RPM | Rigidity |
|---|---|---|---|
| HSK (Hollow Shank) | 3-8 microns | 30,000-50,000 | Excellent |
| BT (MAS-BT) | 5-15 microns | 15,000-25,000 | Good |
| Hydraulic Chuck | 3-5 microns | 20,000-40,000 | Very Good |
| Collet (ER) | 10-30 microns | 12,000-20,000 | Moderate |
| Shrink Fit | 3-5 microns | 30,000-60,000 | Excellent |