Roller screws catalogue

Ewellix is a global innovator and manufacturer of linear motion and actuation solutions used in assembly automation, medical applications and mobile machinery. Formerly part of SKF Group, the Ewellix Group consists of 16 sales units and eight factories. External net sales are approximately 2.3 SEK billion and we employ around 1200 people. Ewellix is headquartered in Gothenburg, Sweden and is owned by Triton. Technology leadership Global presence and local support Our journey began over 50 years ago as part of the SKF Group, a leading global technology provider, with the world’s first precision...

Trusted engineering expertise Our industry is in motion; pushing towards solutions that reduce environmental impact and leverage new technology. We provide technical and manufacturing expertise to overcome our customers’ challenges. We work in a wide range of industries, where our solutions provide key functionality for business critical applications. We have a unique understanding of linear equipment and how it’s integrated in customers’ applications to provide the best performance and machine efficiency. For the medical industry, we provide precision components for use in core medical equipment....

Introduction to roller screws Ewellix roller screws, high performance driving solutions A wide assortment of industries rely on Ewellix roller screws for their actuation requirements. Leading the trend to move from traditional forms of linear actuation, Ewellix roller screws represent the state of the art driving force for powerful electro–mechanical actuation. Ewellix is a pioneer in the technology of roller screws and offers high quality, high performance and the widest assortment of roller screws available on the market. The Ewellix in–house highly integrated manufacturing process uses the...

Product overview Planetary roller screws SR Ultra Power planetary roller screws HR Inverted planetary roller screws ISR • Wide assortment of diameters and leads for numerous applications • Extreme load carrying capacity • All the feaures and benefits of the planetary roller screw design • Reliable driving solution with high loads and speeds capabilities • Robustness and long service life for highly demanding applications • Plus small leads, high load carrying capacity within a compact design Rotating nut planetary roller screws SRR Zero lead roller screws Recirculating roller screws SV • Operation...

Preferred range The Ewellix preferred range encompasses the most frequently used sizes of planetary roller screws and recirculating roller screws. Within that assortment, standard size nuts are stocked at Ewellix factories in Europe and North America for improved availability, greater value, and shorter delivery times. Shafts are manufactured according to customer requirements. Design and manufacturing operations • Standard roller screws with standard and maximum load ratings are available with axial play (SR or SV prefix), or without backlash (BR or BV prefix) • Nut dimensions are detailed hereafter...

Planetary roller screws with standard nuts in stock • SRC cylindrical nut with axial play • BRC cylindrical nut without backlash SRC/BRC cylindrical nut with wipers SRF/BRF flanged nut with wipers • SRF flanged nut with axial play • BRF flanged nut without backlash • SRC/BRC/SRF/BRF nuts with wiper recesses as standard • Standard wipers supplied on request • Right handed thread only • Standard or maximum number of rollers available Nominal diameter Basic load rating Maximum total shaft length Ltp mm SRC/BRC SRC/BRC SRC/BRC/SRF/BRF SRC/BRC SRC/BRC/SRF/BRF SRC/BRC SRC/BRC SRC/BRC/SRF/BRF SRC/BRC/SRF/BRF...

With planetary roller screws, the application load is transmitted from the nut to the shaft through the barrel–shaped surfaces of the rollers. The number of contacts and the total surface area of the contacts between the shaft, the rollers and the nut are substantially increased compared to the ball screw design, resulting in larger dynamic and static load carrying capacities (⮑ fig. 1). This mechanical advantage minimizes input torque and increases application resolution and performance. They can simplify a complete transmission and improve its rigidity. They are often used in applications involving...

Selection guide Planetary roller screws SR/BR, HR: Standard and maximum dynamic load carrying capacity Ca [kN] Nominal diameter d0 mm SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR HR SR/BR SR/BR SR HR SR SR HR SR HR HR SR HR HR HR HR HR HR Standard number of rollers Maximum number of rollers, on request Preferred range

SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR SR/BR HR SR/BR SR/BR SR HR SR SR HR SR HR HR SR HR HR HR HR HR HR SR (C, F or P): Planetary roller screw with axial play BR (C, F or P): Planetary roller screw without backlash HR (C, F or P): Ultra Power planetary roller screw C: Cylindrical nut, F: Centered flange, P: Off–centered flange

Planetary roller screws PR, with internal preload: Standard and maximum dynamic load carrying capacity Ca [kN] Nominal diameter Standard number of rollers Maximum number of rollers, on request PR (U or K): Planetary roller screw with preloaded split nut U: Cylindrical nut, K: Centered flange

Inverted roller screws ISR/IBR: Standard dynamic load carrying capacity Ca [kN] Nominal diameter d0 mm ISR/IBR ISR/IBR ISR/IBR ISR/IBR ISR/IBR ISR/IBR ISR: Inverted roller screw with axial play IBR: Inverted roller screw without backlash Rotating nut roller screws SRR/BRR: Standard dynamic load carrying capacity Ca [kN] Nominal diameter d0 mm SRR/BRR SRR/BRR SRR/BRR SRR/BRR SRR/BRR SRR: Rotating nut roller screw with axial play BRR: Rotating nut roller screw without backlash