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uxcell LM4UU Linear Ball Bearings 4mm Bore 8mm OD 12mm Length for CNC Machine 3D Printer 4pcs

4.3 (2) Write Review
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$15.79

$ 7 .99 $7.99

In Stock

About this item

  • [SIZE] - Model: LM4UU, 4x8x12mm Metric Double Seal Linear Bearing
  • [USAGE] - Linear bearings are part of linear motion systems, often used in conjunction with cylindrical shafts or guideways.
  • [FEATURES] - These ball bearing with two rubber dust sealed to prevent ingress of dirt, water and foreign matter
  • [CAPABILITY] - Static Load Capacity (Cor): 108N, Dynamic Load Capacity (Cr): 88.2N (Recommended load is 80% of rated load, not to exceed rated load.)
  • [APPLICATIONS] - Mechanical slides, 2-axis and 3-axis tables, linear tables, 3D printers, ect.


Product Description

1

  • Linear motion bearings provide freedom of movement in a single direction.
  • Often used in conjunction with cylindrical shaft or rail.
  • The steel ball is in point contact with the shaft and rotates with very little frictional resistance, so as to obtain smooth movement with high precision.
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Linear Ball Bearing Motion Slide Units

  1. Grease may be applied prior to use to improve smoothness.
  2. Maintain lubrication of optical shafts and guides during operation.
  3. The recommended load is 80% of the rated load, exceeding the rated load will affect fluidity.
  4. The table needs to be level during installation, otherwise it will interfere with installation calibration.
  5. Require regular cleaning and maintenance.
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Linear Motion Bearing

X-Y tables, linear stages, machine slides and other advanced slides use linear motion bearings to provide movement along both X and Y multiple axis.

Applications

  • Replacement of parts of the 3D printer rail unit.
  • Replacement of common machine tool guideway components.
  • Laser (engraving machine) rail set-up and parts replacement
  • Construction and replacement of small planing machine tables, carriers, rails and parts.
  • Mechanical Slides
  • 2-axis, 3-axis Benches
  • Linear Stages
Customer Reviews
3.5 out of 5 stars 11
3.8 out of 5 stars 56
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4.2 out of 5 stars 21
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Customer Reviews
3.8 out of 5 stars 51
4.3 out of 5 stars 73
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5.0 out of 5 stars 4
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3.8 out of 5 stars 22
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4.1 out of 5 stars 15
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3.2 out of 5 stars 4
Price — no data — no data $23.09 — no data — no data — no data
Quantity 2pcs 4pcs 1piece 2pcs 1piece 2pcs

C East
Reviewed in the United States on August 4, 2022
These run extremely rough
Paul Long
Reviewed in the United States on April 21, 2021
These didn't work at all for me. You're better off getting the 4mm ball bearings they sell and use those as linear bearings. Way less slop and a much smoother glide. These are loose but somehow also grind on the shaft. I should've just got some bronze bushings.