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Automation & Control

Power Transmission/ Motion Control

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Specialty motors

Electric motors for satellite and aerospace applications are this company's specialty. The Size 15 stepper motor and others are currently being used in a number of space vehicles. Design considerations for the Size 15 include the ability to withstand thermal shock, light weight, power consumption, mission life, and resistance to G forces and vibration.

Empire Magnetics Inc., Box 1908 5780B La Bath Ave, Rohnert Park, CA 94928; FAX (707) 584-3418; www.empiremagnetics.com .

Actuators

This company's new GS series actuators integrate brushless motors with an inverted roller screw mechanism to convert the rotary motion into high speed, high thrust linear motion. The GS series is also sealed to allow use in contaminated environments. The PSA series incorporates a sun gear into the motor rotor, which the company says eliminates the losses, inertia, and inconvenience associated with couplings.

Exlar, 1470 Lake Drive West, Chanhassen, MN 55317; FAX (952) 368-4359; www.exlar.com . 

Linear bearings

This company's SKC line of lubrication-free recirculating linear bearings is said to offer long-term, maintenance-free performance in vacuum and clean room environments. The bearings utilize alternating CERBEC®ceramic, load-bearing rolling elements and smaller Teflon®balls which act as separators, reducing friction and wear. The SKC series is designed to be mounted at any angle and integrate with the company's Type R or RD linear guideways.

Schneeberger, 11 DeAngelo Dr., Bedford, MA 01730; FAX 781-275-4749; www.schneeberger.com .

Rotary motors

The BMS line of dc brushless, slotless rotary torque motors is this company's answer to designers seeking high torque and acceleration in a small package. The motors feature rare-earth neodymium-iron-boron magnets and a high pole-count rotor, and are said to be suitable for applications in machine tools and scanning. The company also says it can custom build variations on the motor with minimal lead time.

Aerotech, 101 Zeta Dr, Pittsburgh, PA 15238; FAX (412) 963-7459; www.aerotechinc.com .

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