Rotary current spindles
Plenty of power for high removal rates.
Rotary current spindles deliver plenty of power for high removal rates. They also enable you to work with the largest tool diameters.
Benefits of a rotary current spindle
- perfect for heavy work, including with large tool diameters
- high degree of precision
- long service life of the spindle bearings
- controllable speeds
- high-speed spindles with up to 40,000 rpm are available
- high torque
- broad clamping range
- software-controlled frequency converter with monitoring functions
- pneumatic cone change feature available
Find the right spindle unit for your production process
We offer rotary current spindles with up to 5 kW nominal power. There are high-speed and low-speed rotary current spindles:
- A high-speed rotary current spindle is recommended for medium tool sizes (diameter approx. 4 to 10 mm). These spindles offer the highest level of flexibility.
- A low-speed rotary current spindle brings plenty of power and torque to the table. It is particularly useful where larger tools (diameter approx. 8 to 20 mm) are used to achieve a high removal volume.
High precision is ensured by the hardened, ground multi-bearing drive shaft, also allowing engraving work to be done. The intelligent frequency converter ensures constant speeds even with varying loads. What is more, the spindles are fully software-controlled and integrated into the CNC milling machine’s safety concept.
All P models feature a pneumatic clamping cone retainer, which is a prerequisite for automatic tool change. This allows your machining process to be automated.
This requires rotary current spindles
Please be aware that all rotary current spindles with pneumatic tool change or sealing air feature require a dry and oil-free compressed air supply for operation which must deliver 6 bar in continuous operation. The air consumption for pneumatic tool change is negligible. Subject to spindle size, sealing air consumption is about 100 to 150 liters per minute. Depending on the overall configuration of your system, different types of compressors may be eligible.
Compressor selection checklist:
- How high is the consumption by sealing air?
- Is there a cooling/spraying unit and/or pneumatic tool change?
- What is the length of the supply line?
- What is the maximum allowable noise level of the compressor?
Spindle types SPC 2300P and SPC 5000P come with a frequency converter for installation in a system rack. The spindle type SPC 2300P also features a compressor cooling unit. To install these components, an appropriate 19” system rack is required.
Technical data
This overview shows the most important data of our rotary current spindle, including:
- output, speed and clamping ranges
- tool change: by hand with manual clamping or pneumatic cone change
- delivery with a compressor cooling unit to protect the spindle against overheating under high loads
All spindles feature a software-controlled frequency converter with monitoring functions (temperature, overload, etc.) as well as an LED status indicator
| Rotary current spindle | Power S1* | Power S6** | Power Pmax*** | Speed rpm | Tool change | Sealing air | Cooling unit | Clamping range |
|---|---|---|---|---|---|---|---|---|
| SPC 1500 | 1,500 W | 1,900 W | 4,100 W | 5,000 – 30,000 | manual | yes | no | up to 10 mm |
| SPC 1500P | 1,500 W | 1,900 W | 4,100 W | 5,000 – 30,000 | pneumatic WK 19 | yes | no | up to 10 mm |
| SPC 2300P | 2,300 W | 2,600 W | 3,500 W | 5,000 – 40,000 | pneumatic WK 19 | yes | yes | up to 10 mm |
| SPC 5000P | 5.000 W | 6.000 W | – | 1,000 – 24,000 | pneumatic SK 30 | yes | no | up to 20 mm |
* mechanical output rate under continuous spindle load (100% machining time)
** mechanical output rate with simulated machining cycle (60% machining time, 40% positioning time)
*** maximum mechanical output rate of spindle
