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Del-Tron Precision, Inc. - Metric Linear Bearings
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Ball & crossed roller slides, multi-axis positioning stages, motor-ready lead screw stages, air actuators, recirculating slide guides, crossed roller rail sets. Subminiature & heavy duty, straight line design & recirculating. Custom design available. Website life/load calculators CAD drawings. Our greatest strength is to offer components which provide a reliable mechanical interface for equipment.
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http://www.deltron.com/ | Email This Company | Phone: 800-245-5013
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5 Trowbridge Drive Bethel, CT 06801 |
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Tusk Direct, Inc. - Metric Linear Bearings
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Linear motion components, assemblies for automated equipment. Ball & crossed roller slides, linear bearings, economic linear bearings, Teflon linear bearings, multi-axis positioners, subminiature to heavy-duty, long travel available. Same-day ship, life-load calculators, CAD drawings. Call before noon & you will be working with your products the next day. We want TUSK to be the name you think of!
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http://www.tuskdirect.com/ | Email This Company | Phone: 800-447-2042
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5 Trowbridge Drive Bethel, CT 06801
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Metric Linear BearingsPunch die presses, injection molds, robotic assembly lines, precision dispensing machines, optic alignment systems and dresser drawers all benefit from metric linear bearings. Because of the broad application, they are sold worldwide in both metric and U.S. customary units; metric linear bearings are identical to their counterpart, simply using centimeters and meters instead of inches and yards. Metric linear bearings are commonly made from aluminum, plastic, hardened steel, galvanized steel or stainless steel; some varieties are constructed from cast iron, and certain kinds of plane bearings also include a strip of Teflon or a fluoro-polymer. Most metric linear bearings require lubrication from oil or grease to ensure smooth motion and long life.
Rolling element bearings have two main forms: ball bearing slides and roller slides. The first consists of lines of ball bearings that are contained to the extent that they will not fall out of the housing but can still rotate freely. They provide smooth, low friction movement as they slide in the raceway, or groove, in the carriage. Roller slides also are low friction and contain cylindrical bearings that rest above and below a V shaped groove in the base. The carriage slides until it reaches the end cap. Typically non-motorized, roller slides can be moved by hand or inertia and are suitable for use in environments with few airborne contaminants. Because the contact surface from the cylinders is bigger than the ball bearings, there is less wear and erosion on the carriage and more consistent contact. Plane bearings also have two main kinds and differ from rolling element bearings because they slide without the use of balls or cylinders. Bushings, the most common plane bearing, consist of an outer shell that slides up and down a shaft. Metal, plastic or both can be used, though plastic bushings are cheaper, self-lubricating, lightweight and resistant to corrosion, dirt and chemicals. The carriage of a dovetail slide is V shaped and locks into a groove in the linear base, which is similar in concept to roller slides except that the whole carriage of the dovetail slide travels in the groove, as compared to cylindrical bearings. Because of the large surface contact area, this linear bearing is high friction but is frequently motorized to carry increased loads for longer distances.
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