The original Prusa linear ball bearing LM10LUU is an extended bearing for smooth shafts with a diameter of 10 mm. Thanks to four rows of balls and a length of 55 mm, it ensures rigid guidance, high accuracy and smooth movement without sticking.

This bearing is factory lubricated – no additional lubrication is needed before installation. It is the same type that Prusa uses as a spare part for the Original Prusa MINI/MINI+, MK4, MK3.9 and CORE One / CORE One L printers, but it is also suitable for custom constructions of 3D printers, CNC machines, sliding tables, jigs and linear axes.

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Key features

• Original Prusa part – proven quality and compatibility with selected Original Prusa printers
• For 10 mm shafts – inner diameter 10 mm for commonly used hardened guide rods
• Long design (LUU) – length 55 mm for better guidance and lower play
• 4 rows of balls – even load distribution, smooth and quiet movement
• Factory lubricated bearing – no initial lubrication needed, correct installation is enough
• High motion accuracy – suitable for precise 3D printing and fine positioning
• Universal use – 3D printers, CNC, linear slides, sliding mechanisms
• Compact and durable metal body – designed for long service life in both hobby and professional use

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Technical parameters

Parameter	Value
Designation	LM10LUU
Bearing type	Linear ball bearing
Inner diameter (shaft)	10 mm
Outer diameter	19 mm
Bearing length	55 mm
Number of rows of balls	4
Body material	steel
Lubrication	factory lubricated, ready for installation
Compatible Prusa printers	MINI, MINI+, MK4, MK3.9, MK4S/MK3.9S, CORE One, CORE One L*
Recommended shaft type	hardened and ground smooth rod 10 mm
Weight of one bearing (approx.)	approx. 0,047 kg

* Compatibility may vary depending on the specific sub-assembly part and printer version, we always recommend checking the official manual or spare parts list for your model.

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Use and installation

• Spare part for axes with 10 mm smooth shafts on Original Prusa printers.
• Suitable for custom constructions of 3D printers, CNC axes, sliding tables, camera sliders and other linear mechanisms.
• When installing, pay attention to:
  • correct alignment of the bearing in the holder to prevent sticking and increased noise,
  • use of precise, straight and hardened 10 mm shafts,
  • cleanliness of the guide rods and the area around the bearing.
• For detailed installation procedures, you can use the official manuals for Original Prusa printers (section “Assembly / Repair manual”).

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Benefits for 3D printing

• More stable axis guidance means fewer vibrations and higher surface quality of prints.
• The original component minimizes the risk of play, binding or rapid wear known from cheap non-original bearings.
• Thanks to factory lubrication and correct installation, the operation is quieter and smoother, which you will appreciate during long prints in the same room.

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Package contents

• 1× Prusa linear bearing LM10LUU, factory lubricated

The package is ideal as a set for replacing multiple bearings on one axis or for building your own linear axis with 10 mm shafts.

Key features:

• Original Prusa linear bearing LM10LUU for smooth shafts with a diameter of 10 mm
• Long design (55 mm) with four rows of balls for higher rigidity and more precise guidance
• Factory lubricated bearing – no initial lubrication required before installation
• Compatible with selected Original Prusa 3D printers (MINI/MINI+, MK4, MK3.9, CORE One / CORE One L)
• Suitable for 3D printers, CNC machines, sliding tables and other linear applications
• High-quality steel design with long service life in both hobby and professional use
• Package of 2 pcs – ideal for replacing multiple bearings or building your own axis