Linear Bearings & Blocks
Ball bushings, carriage blocks and plain linear bearings.
Also searched as: lm8uuball bushinglinear blockcarriageigus bearing
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DryLin R Liner Plain Bearing
Inner Diameter: 3/8 "
from $61.95Amazon $61.95 -
DryLin R Liner Plain Bearing
Inner Diameter: 5/8 "
from $57.95Amazon $57.95 -
DryLin R Solid Plastic Bearing
Inner Diameter: 10 mm
from $18.99Amazon $18.99 -
DryLin R Solid Plastic Bearing
Inner Diameter: 16 mm
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DryLin R Solid Plastic Bearing
Inner Diameter: 8 mm
from $9.89Amazon $9.89 -
DryLin R Standard Clearance Straight Open Linear Bearing
Nominal Size: 1 1/2 "
from $112.95Amazon $112.95 -
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DryLin R Straight Linear Bearing
Inner Diameter: 8 mm
from $17.99Amazon $17.99 -
DryLin R Straight Linear Bearing
Inner Diameter: 5 mm
from $6.59Amazon $6.59 -
DryLin R Straight Linear Bearing
Inner Diameter: 25 mm
from $19.47Amazon $19.47 -
DryLin R Thin Walled Standard Clearance Linear Bearing
Nominal Size: 8 mm
from $8.99Amazon $8.99 -
DryLin Self-Aligning Split Linear Bearing
Inner Diameter: 20 mmWidth: 32 mm
from $16.09Amazon $16.09 -
DryLin Self-Aligning Split Linear Bearing
Inner Diameter: 30 mmWidth: 47 mm
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DryLin Straight Split Linear Bearing
Inner Diameter: 30 mmWidth: 47 mm
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DryLin Straight Split Linear Bearing
Inner Diameter: 16 mmWidth: 26 mm
from $28.69Amazon $28.69 -
Drylin Bearings, Polymer - Replacement for LM8UU
Inner Diameter: 8 mm
from $18.41Amazon $18.41 -
from $21.95Amazon $21.95 -
LM8LUU Linear Bearing Black Chrome Plated Rod Bushing
Coating: Black Chrome Plated
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LM8UU Linear Ball Bearing
Bore Diameter: 8 mmOutside Diameter: 15 mm
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LM8UU Linear Ball Bearing with Double Side Rubber Seal
Bore Diameter: 8 mmLength: 24 mmOutside Diameter: 15 mm
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LM8UU Linear Bearing
Bore Diameter: 8 mmOuter Diameter: 15 mmTotal Length: 24 mm
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LM8UU Linear Motion Ball Bearing 8x15x24 mm
Bore: 8 mmLength: 24 mmOutside Diameter: 15 mm
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LM8UU Linear Motion Bearing Bushing
Height: 24 mmInner Diameter: 8 mmOuter Diameter: 15 mm
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from $7.99Amazon $7.99 -
Sleeve Bearing
Length Thru Bore: 26 mmNominal Bore: 30 mmNominal Outside Diameter: 34 mm
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Solid Polymer LM8UU Bearing
Shaft Diameter: 8 mm
About linear bearings & blocks
Linear bearings and blocks facilitate smooth, low-friction linear motion. This category encompasses ball bushings, linear plain bearings, and carriage blocks, each suited for different applications based on load, speed, and environmental factors. Ball bushings, often identified by designations like LM8UU or LME16UU, utilize recirculating balls to achieve precise linear guidance, typically on hardened and ground shafts. They are available in open, closed, flanged, and adjustable clearance types, with dynamic load ratings (C) and static load ratings (C0) being critical selection parameters. Carriage blocks, such as those found in profile rail systems, integrate a bearing assembly with a mounting platform, providing high rigidity and load capacity, often specified by their size, series (e.g., HGH, HGW), and preload class. Linear plain bearings, including those made from self-lubricating polymers like Igus iglide materials or bronze alloys, offer quiet, maintenance-free operation for lighter loads or contaminated environments, with selection based on shaft diameter, length, and PV limits. Common materials include hardened steel for ball bushings, aluminum or steel for carriage blocks, and various polymers or sintered bronze for plain bearings. Finishes like chrome plating or corrosion-resistant coatings are available for specific environmental demands.
How to choose
Selecting the appropriate linear bearing begins with defining the motion requirements. First, determine the load capacity: is it light, moderate, or heavy? This dictates whether plain bearings, ball bushings, or profile rail blocks are suitable. Second, consider the required precision and rigidity: profile rail blocks offer the highest, while plain bearings offer the least. Third, evaluate the operating environment: high temperatures, contamination, or washdown conditions may necessitate plain bearings or corrosion-resistant variants. Fourth, specify the shaft diameter or rail size, which directly influences bearing dimensions and load ratings. Finally, assess speed and acceleration demands, as these impact bearing life and heat generation, particularly for ball-based systems, and help in selecting appropriate preload or clearance.