Screw assemblies

Rexroth offers a wide range of screw assemblies. Screw assemblies are units converting rotary motions into linear motions or vice versa. In this connection, the most important products are the ball screw assembly and the planetary screw assembly.

Ball screw assembly

Rexroth ball screw assemblies provide the constructor with manifold possibilities for solving transport and positioning tasks with driven spindle or also driven nut. No matter whether highest linear velocities, maximum load ratings or minimum construction lengths, you will always find the perfect solution.

Benefits at first glance:

  • Extra-quiet running thanks to optimized ball pickup from the guideway
  • Uniform functioning based on the principle of total internal recirculation
  • Large number of balls for high load capacities
  • D x n parameters of 150 000 now permit highly dynamic applications
  • Effective seals with wiping action
  • Trouble-free installation of nuts
  • Large range of items available from stock
  • Five-day express delivery available on request

Standard Range

Rexroth Ball Screw Assemblies do not only work with greater levels of accuracy and at higher speeds, they can also be supplied at very short notice. A wide range of precision screws and preloaded or adjustable-preload single and double nuts is available for all feeding, positioning and conveying tasks.

Screw Assembly with Front Lubrication Unit

The new Rexroth VSE front lubrication unit for screw drives in diameters of 20, 25, 32 and 40 offers the lowest Total Cost of Ownership: without maintenance attention or central lubrication it provides optimum lubrication for up to 300 million revolutions or 5 years of operation in normal conditions.

Asia Series Connection dimensions per JIS

Nut program with bigger outer diameters, bigger flange diameters and counter-bores in the flange, according to JIS B1192 (table 5)

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Planetary screw assembly

With the planetary screw assemblies, Rexroth enters the top screw assembly performance classes. The powerful drive elements are particularly suitable for use in the construction of medium- and heavy-duty machinery like presses, machine tools and plastic injection molding machines.

Benefits at a glance:

  • High load-bearing capacity and stiffness due to numerous, large contact surfaces
  • Low-noise operation due to guided planets
  • Small installation space due to increased power density
  • Reduced lubricant consumption and good environmental protection thanks to effective seals
  • Different nut designs available

Using the PLSA Planetary Screw Assemblies, Rexroth extends the area of application of their screw assemblies by the fast movement of high loads.

In Planetary Screw Assemblies, several planets are positioned rotation-symmetrically in one nut. They rotate parallel to the axis around a rolled threaded spindle and generate a linear motion.

The numerous construction-inherent contact surfaces lead to high axial stiffness and load-bearing capacity and thus allow for a long service life. PLSAs achieve highest positioning accuracy and repeatability even with minimum travel movements.