Roller Screws
Planetary roller screws
Ewellix has the largest selection of planetary roller screws on the market to meet any requirements. The planetary roller screw drives without roller recirculation ensuring ultimate drive performance. They are extremely robust and load-bearing, offer maximum performance in terms of speed and acceleration and are extremely durable and reliable.
Diameters from 8 up to 240 mm
Leads from 2 up to 50 mm
Dynamic load capacity up to 3 994 kN
No recirculation system enabling high acceleration and speed
Benefits:
- Longer service life due to increased robustness
- High-reliability, low noise, high rotational speed (N.d0 max = 160000)
- Exceptional behaviour in situations with frequent changes of direction and high linear speed, up to 1.8m/s
- Customised designs possible
Features:
- Heavy load capacity with up to a 50 mm long lead
- Planetary concept without recirculation and rollers, synchronised by cogs
- Adaptable tooling for non-standard, left handed thread or customised designs
- Axial play or preloaded execution on request
Recirculating roller screws
Roller screws with roller recirculation offer an ultra-precise drive solution thanks to a perfect combination of high load capacity, the smallest possible pitch for fine resolution, high positioning accuracy and axial rigidity.
The small pitches or pitch angles of the spindle thread reduce both backward motion and rolling friction.
Nominal diameters from 8 to 125 mm
Standard leads from 1 mm to 5 mm
Dynamic load capacity up to 756 kN
Positioning accuracy with high repeatability
Benefits:
- High load capacity and rigidity, further increased by preloaded options
- Extremely accurate positioning with excellent repeatability
- Limited torque applied due to short wheelbase and enhanced efficiency
- Improved robustness and reliability to ensure long service life
Features:
- Very fine lead down to 1,0 mm, while providing a high load carrying capacity and high axial stiffness
- Heavy load capacity and long service life
- Low back driving ability
- No miniature parts
