NT series
Hollow shaft gears for NC rotary tables
High precision, high output speeds and a high degree of efficiency - these are the demands a drive unit should live up to for use in rotary tables. The NT series from Nabtesco meets these requirements. Thanks to their RV gear design, the NT reduction gears are extremely resistant to impact loads. The hollow shaft enables the central routeing of various cables, media or rotary movements. The contact between the trochoidal disc and housing takes place through rollers. This reduces the wear and increases the service life and reliability.
The NT gears offer additional decisive advantages over conventional rotary table drives:
- The output achieves and output speed of 100 rpm.
- The gears achieve a degree of efficiency of 80 per cent.
- The reproducibility lies at +/- 1.0 arc second.
- The indexing precision is +/- 2.5 arc seconds.
- The assembly times are reduced, because neither an adjustment of the backlash nor the pre-tensioning or the adjustment of the concentricity is necessary.
Integrated main bearing
- Adjustment not necessary
Roller cycloidal construction
- Large overload capacity (shock load)
- No adjustment of backlash necessary
Angular ball bearings at both ends
- Large overload capacity (shock load)
- High torsional rigidity
Needle bearings
- High output speed (70 rpm)
- Low wear
- High degree of efficiency (80%)
Assembly for the B-axis of the horizontal machining centre
- Higher speed shortens cycle times
- Easy installation
- Energy savings due to high degree of efficiency
- Increased reliability (maintenance-free)
Direction of the B-axis
- Schalttisch (Hirth-Verzahnung)
- Drehtisch (Schneckenrad)
