# Maximum number of channels/spindles

Mains switch box | Maximum number of channels/spindles | Number of front end power cables
--- | --- | ---
| QST 34 | QST 42 | QST 50 | QST 62 | QST 80 |
70% torque, 30% speed | 60% torque, 20% speed
30 A | 38 | 30 | 28 | 22 | 13 | 1
2x30A | 64* | 60* | 56* | 44 | 26 | 2

* For fully synchronized spindles, 64 spindles is the limit.

However, up to 64 bolts can be set up in the system. That is to say, for example, a system with 60 bolts and 30 spindles can be set up and each bolt has a unique number. The 30 spindles can tighten first 30 bolts and then the rest 30 bolts.

Conditions

- Simultaneous tightenings on all channels.

- Angular speed at final tightening: 20% of tool maximum speed for QST50 - QST80, 30% speed for QST34 - QST42

- Final torque: 60% of tool maximum torque for QST50 - QST80, 70% torque for QST34 - QST42

- Tightening interval 30 s (two per minute)

- Environment: sea level, room temperature and without cooling fans

- Tightening angle 360 degrees.

- Power factor: PF=0.6

- For higher torques, speeds and shorter tightening intervals it may be necessary to use more mains connection cables and mains switch boxes than stated in this table. In this case, contact your service center for advice.

Available power based on fuse

- At 30 A, output: 12.5 kW (PF=0.6, U=400Vac), 41.8 kW peak @ 1 second.

- At 2x30 A, output: 2x12,5 kW=25 kW (PF=0.6, U=400Vac), 83.6 kW peak @ 1 second.

- At FlexCarrier internal 16 A circuit breaker: 6.7 kW, 13 kW peak @ 1 second.