Linear Bearings Specifications

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Bearing Type



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	Air		Air bearings are a very low friction bearing that rides on a cushion of air.
	Flat Ball Cage		Flat ball cage linear bearings are non-recirculating or recirculating bearing design where the balls are trapped in a frame that spaces them at equal distance. These balls ride on a rail and are usually lubricated.
	Bushing, Ball		Bushing, ball bearings are similar to a bushing in construction but have rows of balls to reduce friction and increase stiffness, accuracy, and smoothness. The bushing may be of open or closed construction. Open bushings ride on continuously or intermittently supported round shafts, while closed bushings ride on end supported shafts. Several different types and options are available including recirculating ball, non-recirculating ball, linear only motion, rotary / linear motion, self-aligning, and adjustable preload.
	Needle Roller Cage		Caged needle bearings are low friction, high load bearings in a composite cage. A common industry designation for these is M/V or N/O type linear bearings.
	Cam Follower		A cam follower is a wheel on an axle and that wheel runs on bearings. Cam followers offer high speed, rigid operation, and a long working life.
	Crossed Roller Courtesy of Del-Tron Precision, Inc.		Roller and cross roller bearings are used on linear ways where straightness and accuracy are critical. The trade off is in loading capability.
	Guide Wheel		A low cost, versatile, and rugged alternative to traditional linear bearings. They can be used on linear or circular rails or guides.
	Hydrostatic / Hydrodynamic		A linear hydrostatic bearing works much like an air bearing. The bearing body rides on a thin film of oil or water that provides for near frictionless movement.
	Plain / Journal Courtesy of Berg W.M., Inc.		Journal bearings consist of a split cylindrical shell of hard, strong metal held in a rigid support and an inner cylindrical part of soft metal, which holds a rotating shaft. The primary shaft support is the lubricating fluid, usually oil.
	Linear Motion Guide		Linear motion guides are linear profiled rails that have a set of mating bearings that travel along the rail.
	Flat Roller Cage		Flat roller cage bearings are similar to crossed roller bearings except that the axes to all of the rollers are parallel instead of crossed. They consist of a flat cage of rollers with the axes all in line with each other. They can be used in a set of rails with a precision v-guide or between two flat surfaces.
	Linear Roller		Linear roller bearings are a set of circulating roller bearings that ride on a round or flat guide. These bearings have extremely heavy load capacities.
	Spline Bushing / Ball Spline		A spline bushing is a linear bearing with contact grooves that match those in a mating shaft. Bushing can be of plain bearing or ball spline design. A ball spline bearing has balls that contact grooves in a matching spline shaft on at least four sides, depending on the number of splines. The balls recirculate as the bearing moves along the guide.
	Other / Proprietary		Other unlisted, specialized, or proprietary linear bearings.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Bearing / Rail Assembly?		A complete assembly comprised of the bearing and guide or rail.
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Special Bearing Materials



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	Bronze		Bronze is an alloy of primarily copper and a small amount of tin.
	Ceramic		A bearing made of ceramic material and provides very smooth operation.
	Graphite		Graphite is a soft, slippery, carbon based material that acts like a lubricant.
	Plastic		Any of a number of thermoset or thermoplastic polymers that have a high molecular weight.
	Stainless		A particular alloy made of chromium and other metals that are resistant to corrosion and rust.
	Other / Custom		Other unlisted, specialized, or proprietary bearing materials.
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	Special Material Features
	Your choices are...
	Corrosion Resistant		Corrosion resistant bearings are made with corrosion resistant material or coatings.
	Self Lubricating		In self lubricated bearings, the guide shaft can rotate in the bearing instead of moving axially.
	Rotary Motion		The bearing has the capability for rotary motion as well as linear motion.
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Bearing Specifications


	Bearing Width:		Bearing width is the overall width of a rectangular or square bearing.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Bearing Length:		Bearing length is the dimension of the bearing along the direction of travel.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Inside Diameter (Round only)		The inside distance of a round bearing across the rail.
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	Dynamic Load Capacity:		Dynamic load capacity is the axial and radial static forces multiplied by dynamic factors combine to form the equivalent dynamic bearing load.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Bearing Housing



	Your choices are...
	Flanged		The flange on the bearing housing may come in a variety of styles. The most common flange types are round and square.
	None / Open		A bearing support technique where there is virtually no enclosure around the bearings.
	Rectangular		A rectangular housing refers to the overall shape of the housing that mates with the guide. It will contain the bearing type that rides on the guide.
	Pillow Block		Pillow block housing is a type of housing where open or closed style linear bearings or bushings are fit inside.
	Other		Other unlisted, specialized or, proprietary bearing housings.
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	Open / Closed (If applicable)
	Your choices are...
	Open		Open bearing design is where the bushing body surrounds most but not the entire shaft it runs on. The open portion allows it to pass over shaft supports, allowing for a fully supported shaft.
	Closed		Closed bearing design is where the bushing body surrounds the entire shaft it runs on. Closed bearings can only be used with end-supported shafts.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Bearing Features and Options



	Your choices are...
	Adjustable Preload		Bearing alignment and/or preload can be adjusted.
	Clean Room Use		Clean room use applications are where the bearings are sealed to prevent environmental contamination.
	Lubrication Port		A lubrication port is a nipple attached to the bearing housing that permits occasional lubrication.
	Recirculating Bearings		Recirculating bearings are ball or roller bearings that have longer life and can be used for higher loads.
	Self Aligning		Self-aligning assures even load distribution of even the heaviest weights.
	Vacuum Compatible		Vacuum compatibility refers to special materials and construction used with bearings in reduced atmospheres.
	Wipers / Seals		Wipers and seals are for cleaning surface of rails bearings ride on. This should include scrappers also.
	Other		Other unlisted, specialized, or proprietary features or options.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Linear Bearings Specifications

Bearing Type:

Bearing / Rail Assembly?

Special Bearing Materials:

Special Material Features:

Bearing Width:

Bearing Length:

Inside Diameter (Round only):

Dynamic Load Capacity:

Bearing Housing:

Open / Closed (If applicable):

Bearing Features and Options:

Help with Linear Bearings specifications: