550 article numbers on the HSK-A taper to DIN 69893, in four families — collet chucks, end mill holders, face mill holders and adapters. Every dimension on these pages is the one the catalogue prints. Mongtec Precision is a Taiwanese brand, designed and engineered in Taichung, Taiwan.
A steep taper such as BT locates on the taper alone. HSK is a hollow short taper that pulls up against the spindle face as well, so the holder is located twice — radially by the taper, axially by the face. At speed the spindle bore expands and a steep taper loses contact; the face contact does not. That is why HSK is the interface on high-speed and heavy-face-milling spindles, and why an HSK-A holder costs more than the BT equivalent.
The A form is the general-purpose one: driven, with drive slots, coolant through the centre, for machining centres. E and F forms are lighter and unsymmetrical-free for very high speed; T is for turning centres.
| Page | Article numbers | Covers |
|---|---|---|
| HSK-A collet chucks | 185 | ER collet chucks · power milling chucks · shrink and high-precision bodies |
| HSK-A adapters and special holders | 176 | Morse taper · drill chuck · tapping · boring blanks · sleeves |
| HSK-A end mill holders | 136 | Weldon side lock · whistle notch · screw-in milling cutter |
| HSK-A face mill holders | 53 | Shell mill arbors, inch and metric · combi shell mill |
| Size | Article numbers | Families |
|---|---|---|
| HSK32A | 9 | Collet chucks |
| HSK40A | 9 | Collet chucks |
| HSK50A | 50 | All four families |
| HSK63A | 227 | All four families |
| HSK80A | 47 | All four families |
| HSK100A | 208 | All four families |
HSK63A and HSK100A carry the programme — between them 435 of the 550 numbers. If your spindle is one of those two, almost everything in the catalogue is available to you.
| Taper standard | DIN 69893 |
|---|---|
| Material | Alloyed case hardened steel |
| Hardness | HRC 56–60 |
| Case depth | 0.8 ± 0.2 mm |
| Surface roughness | Ra below 0.2 µm |
| Balance grade | G2.5 / 25,000 rpm |
| Coolant | Through centre; flange form on request |
Yes — unlike BMT, HSK is standardised in DIN 69893, so an HSK63A holder fits any HSK63A spindle. What varies is the drawbar and clamping unit inside the spindle, not the holder interface.
No. A and E are different forms. A has drive slots and a different flange geometry; E has none and is built for higher speed. Match the letter as well as the number.
The dimensions printed in the catalogue are on the four pages above. The full dimensioned drawing is supplied by email once an enquiry is open, so it matches your actual spindle and drawbar.
Because the catalogue does not print that dimension for that article number, or prints it in a way we could not reconcile against the rest of the table. Rather than guess, the cell is left blank and marked to confirm at RFQ.
Send the spindle taper and the operation — we quote the right family →
BT and BBT tool holders · HSK-T turning tools · Shrink fit · Hydraulic · All tool holders