LM8UU LM12UU Printed Linear Bushings | 12 Sizes

Drop in replacements for LM series ball bushings. No balls, no noise, no shopping.

Twelve solid polymer bushings in the exact LM envelope: same bore, same outside diameter, same length as the steel ball bushings on your printer, your CNC or your camera slider. Pull the old one out of the pillow block, press this one in.

Commercial solid polymer bushings exist and they cost real money per piece. This is that idea, printable, in every common size at once.

Glide, not roll

The bore is not a smooth cylinder. It carries 6 to 19 internal lands depending on size, in the style of commercial polymer bushings: the rod rides on narrow ribs, the grooves between them cut friction, trap dust away from the contact and hold lubricant.

Printed standing, the layer ridges inside the grooves work for you instead of against you.

Verified, not estimated

Every size checked in CAD before release:

• Bore clearance: 0.20 mm on the diameter, identical on all 12
• Outside diameter and length: exact LM catalogue dimensions
• Land geometry verified solid by solid on every model

One clearance across the family means one calibration: dial in the LM8UU on your rod, and the other eleven fit the same way.

What is included

Standard series

LM6UU · 6 × 12 × 19 · 6 lands LM8UU · 8 × 15 × 24 · 8 lands LM10UU · 10 × 19 × 29 · 9 lands LM12UU · 12 × 21 × 30 · 11 lands LM16UU · 16 × 28 × 37 · 15 lands LM20UU · 20 × 32 × 42 · 19 lands

Long series

LM6LUU · 6 × 12 × 35 LM8LUU · 8 × 15 × 45 LM10LUU · 10 × 19 × 55 LM12LUU · 12 × 21 × 57 LM16LUU · 16 × 28 × 70 LM20LUU · 20 × 32 × 80

Print settings

• Orientation · standing, as supplied. This is what makes the bore round
• Layer height · 0.16 mm
• Walls · 4, infill 40 percent
• Supports · none
• Thin wall detection · off, or the slicer fuses the internal lands
• Material · PLA works, PETG is better, nylon is what the commercial ones are made of