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How to choose a linear rail and carriage for linear motion: Linear bearings give new meaning to riding the rails

From Thomson Industries Inc.

Linear rails come in basically two types, round and square.
The criteria for choosing one over the other is no different
than choosing any other machine component; spec out the
design, defi ne the system's objectives, and work from past
successes and mistakes.

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Products & Services
Gearboxes and Gearheads
Gearboxes and gearheads, also called gear reducers or speed reducers, are power transmission devices that use a gear arrangement in an enclosed housing to transfer energy, increase torque and reduce speed from one device to another. Gearboxes may also be referred to as gear reducers or speed reducers.
Ball Screws
Ball screws convert rotary motion to linear motion, or torque to thrust, and vice versa. They are primarily a power screw with a train of ball bearings riding between the screw and the nut in a recirculating track.
Lead Screws and ACME Screws
Lead screws and ACME screws are used to drive a nut in linear motion via direct contact between the screw and the nut. Lead screws usually incorporate proprietary screw and nut geometries and materials, and can be configured in zero-backlash arrangements.
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