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Linear Motion Tips

Covering Linear Motion Systems, Components and Linear Motion Resources

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planetary roller screw

Planetary Screw Assemblies: New sizes with increased capacity range

July 13, 2015 By Danielle Collins Leave a Comment

Rexroth opens up new fields of applications with planetary screw assemblies with new sizes. The drive elements with screw diameters up to 75 mm and leads up to 20 mm achieve static load capacities up to 1,496 kN while featuring a compact design. They are ideal for use in medium sized and heavy-duty machinery such […]

Filed Under: Ball + lead + roller screws, Industry news Tagged With: Bosch Rexroth, planetary roller screw, rexroth

ATEX rated explosion-proof linear actuators

April 28, 2015 By Danielle Collins Leave a Comment

Exlar EL120 Electromechanical Actuator

Curtiss-Wright Corporation has expanded its Exlar® linear actuator line to include the EL120 explosion-proof linear actuators. The EL120 linear actuators meet ATEX requirements for use in potentially explosive atmospheres and are in conformity with the EU ATEX Directive 94/9/EC, as well as the IECEx scheme. Additionally, they are rated for Class I, Div 1, Groups B, […]

Filed Under: Ball + leadscrew driven, Industry news, Linear actuators (all) Tagged With: exlar, Linear Actuator, Linear Actuators, planetary roller screw

What happens when you combine a planetary gear with a ball screw?

April 17, 2015 By Danielle Collins 2 Comments

Answer: You get a planetary roller screw. Replacing the recirculating balls of a ball screw with grooved rollers results in a precision drive mechanism with extremely high load capacity, acceleration, and speed capabilities, all in a small footprint. Planetary roller screws fit well in applications at the upper end of ball screw capabilities, but that require […]

Filed Under: Ball + lead + roller screws Tagged With: Ball Screw, planetary roller screw, roller screw

Exlar expands its planetary roller screw portfolio

June 29, 2011 By admin Leave a Comment

Exlar (www.exlar.com) has expanded its component planetary screw portfolio to offer two new performance capacities, available in PRR and PRS models. The PRR models feature G9 lead accuracy, deliver static load ratings up to 18,000-lbf and are offered in screw diameters ranging from 12 mm to 27 mm. Meanwhile, the PRS models offer static loads […]

Filed Under: Ball + lead + roller screws, Linear actuators (all) Tagged With: exlar, linear motion, planetary roller screw

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