The M321 automatic toolchange is a robust precision machining spindle with a maximum speed of 125,000rpm, fitted with an interchangeable automatic collet system. Collet sizes from 3mm to 6mm diameter are available. With a powerful AC motor and front thrust bearing system, it is ideal for glass grinding, and micro-machining of non-ferrous materials, and is designed for use in specialised, multi-spindle CNC machine tools.
| Speed range | 10,000rpm - 125,000rpm |
| Motor power (max) | 750 Watts |
| Automatic tooling system | Pnuematic, with interchangeable collets |
| Collet sizes | 1/8”, 3, 4 and 6mm shank dia. |
| Bearing air supply pressure | 5.6 kg/cm*2 |
| Bearing air consumption | 85 nl/min |
| Coolant flowrate | 1.5 l/min (water) or 3 l/min (oil) |
| Heat dissipation to coolant (max) | 640 Watts |
| Axial failure load (push) | 200 N |
| Collet torque (max) | 4 Nm with 6mm bore collet |
| 2 Nm with 1/8” bore collet | |
| Dynamic runout at tool | 7 microns |
| Motor type | 3 phase, 2 pole AC |
| Speed sensor (tacho) - optional | TTL signal |
| Weight (approx) | 4 Kg |
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