Description
What it is
Linear ball bearings LMK12UU are mechanical components that allow for smooth and precise linear motion. They consist of steel balls that rotate within guides, reducing friction and ensuring a smooth movement.
Features
- Bore diameter: 12mm
- Outer diameter: 21mm
- Length: 30mm
- Type: square flange
What it is for
Linear ball bearings LMK12UU are ideal for mechanical and 3D printing projects that require precise linear motion. They can be used in applications such as robots, 3D printer guide systems, height-adjustable tables, and other devices that need smooth and precise linear motion.
Tutorial: How to use Linear Ball Bearings LMK12UU
Linear ball bearings LMK12UU are ideal for projects requiring smooth and precise linear motion. They are particularly useful for makers and builders working on mechanical or robotic prototypes.
What you need
- hammer putty
- open-end wrench
- screws
Steps
- Check that the mounting component’s hole matches the inner diameter of the bearing (12mm).
- Use the hammer putty to gently insert the bearing into the hole.
- Check that the bearing is properly positioned and not tilted.
- Use the open-end wrench to secure the bearing with the appropriate screws.
- Check the rotation of the bearing to ensure it is smooth and obstacle-free.
Mini project
Design a small mechanical rover with two linear ball bearings LMK12UU for the wheels. The rover should be able to move in a straight line on a flat surface.
Common mistakes
- Insert the bearing with excessive force.
- Do not check the rotation after installation.
- Use incorrect screws or bolts.
- Do not secure the bearing correctly.
Recommended accessories
- Screws and bolts for mechanics
- Allen keys
- Measuring tools
Frequently asked questions
Can the bearing be mounted on inclined surfaces?
Check the datasheet to confirm compatibility with inclined surfaces.
How much does the bearing weigh?
Check the datasheet to obtain the precise weight of the bearing.









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