Balancing feature for HSK
Sandvik Coromant offers chip holes on all HSK tools to meet today’s industry 4.0 demands. If an HSK tool has got the feature “Balanced by design”, the balancing of the coupling has been changed from the previous ISO standard revision. Balancing occurs mainly in the gripper groove of the product. For HSK40 and HSK50, additional balancing is performed in the flange area.
Balancing features for HSK63 to HSK160 coupling
Balancing features for HSK40 and HSK50 coupling
Re-balancing when adding data carrier
When adding a data carrier into the chip hole, re-balancing the coupling is required to re-establish balance in the adaptor. There are different considerations in placing the balancing holes depending on the HSK size. For a data carrier of an assumed weight of 700 mg (0.025 oz), consider the following. For a different weight, the values must be recalculated.
HSK40
The re-balancing should be done with a 90° tip drill and a diameter of 7.39 mm (0.291 inch). The distance between the centre of the hole and the coupling centre needs to be 16.28 mm (0.641 inch).
The position of the holes is 28° from the centre of the chip hole. It needs to have the same length from the gauge line as the centre of the chip hole (7 mm / 0.276 inch).
HSK50 to HSK160
Re-balancing should be done at the chip hole’s bottom. The drill needs to be a 140° tip drill with a diameter of 7.5 mm (0.295 inch). According to the table below, the drilling depth depends on the HSK size:
- X: length from centre of coupling to the bottom of 7.5 mm (0.295 inch) hole
| Coupling size | X | |
| mm | inch | |
| HSK50 | 17.55 | 0.691 |
| HSK63 | 24.28 | 0.956 |
| HSK80 | 32.98 | 1.298 |
| HSK100 | 43.03 | 1.694 |
