Linear Motion Requirements Come in All Shapes and Sizes. So do Exlar Actuators!

Why Roller

1. Rollerscrews can operate with more force than ball screws for an equivalent physicalsize.
2. Rollerscrews have a friction advantage. Rollers are contained in a ring and do notcontact each other, while recirculating balls have friction from the ballsrubbing against each other while moving through the track. 
3. Increasedspeeds.  In any recirculating ball system, the U turn in the ball path isfrequently what limits the speed. Using planetary rollers, Exlar's roller screwactuators can operate efficiently up to 6000 rpm. Higher operating speeds canincrease the optimal use of servo motors and reduce the need for intermediategearboxes.

Exlar's actuators are versatile and dependable. What's their secret?  The utilization of roller screws. 

Why Roller Screws?

1. Roller screws can operate with more force than ball screws for an equivalent physical size.
2. Roller screws have a friction advantage. Rollers are contained in a ring and do not contact each other, while recirculating balls have friction from the balls rubbing against each other while moving through the track. 
3. Increased speeds.  In any recirculating ball system, the U turn in the ball path is frequently what limits the speed. Using planetary rollers, Exlar's roller screw actuators can operate efficiently up to 6000 rpm. Higher operating speeds can increase the optimal use of servo motors and reduce the need for intermediate gearboxes.

Where Should We Use Roller Screws?

1. Exlar roller screws can be used to improve upon pneumatic cylinder arrangements in many applications. Sometimes fragile products or increasing customer speed requirements can push the limits of pneumatic motion solutions. Pairing a roller screw with a servo motor can provide precise acceleration and deceleration; as well as jerk adjustment to minimize product tip overs, spillage and slippage. Sometimes new product requirements require programmable or multiple start stop points. Exlar roller screws allow for flexibility and control and allow rotary servo motors to be translated to linear motion. 
2. Higher force applications that have traditionally been the domain of hydraulic cylinders can be accommodated by roller screws. Exlar roller screw actuators are available with force capacities up to 40t (80,000 pound/36,300 kg). High force applications frequently require dedicated hydraulic power units and that comes with maintenance chores. Utilizing electric actuators instead of hydraulic will save on the costs of these chores.
3. Utilizing Exlar roller screws with Rockwell Automation Integrated Motion allows speed and force monitoring throughout the stroke to allow for more precise process outcomes. 

So, if you are looking to convert rotary motion into linear motion, Exlar roller screws are the answer. The advantages can include; speed of operation, precision control,reduced maintenance and reduced costs. 

Want to learn more?  Contact your Revere Motion Specialist for more information or to discuss specific applications. 

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