Bearing housings and linear supports: KP08, KFL08, SK8, SC8UU, V-wheels, sleeve bushings — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/bearing-housings-and-rod-supports/  (CC BY 4.0)
Basis: Catalogue dimensions for the common 8 mm printer/CNC parts (KP08, KFL08, SK8, SC8UU), OpenBuilds V-wheel (23.89 × 10.23), and standard sleeve-bushing sizes; printed versions take a bare 608/625/LM8UU
Catalog version: 2026-10-20

Sizes: see table below
- KP08: Ø8 self-aligning insert bearing in a cast housing; 15 mm centre height, base 55 × 13, two Ø5 holes 42 mm apart. KFL08: 2-bolt flange, Ø8, holes 37 mm apart, 25 mm wide. Both also exist in KP000/KFL000 (10 mm) and KP001 (12 mm).
- SK8: Ø8 rod clamp, 20 mm centre height, base 42 × 14 with two Ø5.5 holes 32 mm apart, M4 pinch screw. SHF8 is the flanged version. SC8UU: an LM8UU in an aluminium block, 34 × 30 × 22, four M4 on 24 × 18, 11 mm from base to rod centre. SC8LUU holds an LM8LUU at 58 long.
- V-wheel (OpenBuilds): Ø23.89 OD, 10.23 wide, 90° groove, two 625 bearings with a 1 mm spacer; runs in V-slot (6.2 mm) extrusion. Eccentric spacers of Ø7.1 adjust preload.
- Sleeve bushings: Ø3×5, 4×6, 5×8, 6×10, 8×12, 10×14 (ID × OD) in bronze (oiled), graphite-bronze (dry), PTFE-lined. Press into a printed hole at OD − 0.1; shaft runs at ID + 0.02. Printed PETG bushings run fine at low speed: hole = shaft + 0.2.
- LES: KP08 blocks under the flywheel shaft on the big engines; SK8 + 8 mm rod as a displacer guide; bushings in every printed link.

part  bore_mm  centre_height_mm  footprint_mm  holes
KP08  8  15  55 × 13  2 × Ø5 @ 42
KFL08  8  flange  55 × 25  2 × Ø5 @ 37
SK8  8  20  42 × 14  2 × Ø5.5 @ 32
SC8UU  8  11  34 × 30 × 22  4 × M4 @ 24 × 18
V-wheel  2 × 625  Ø23.89 × 10.23  —  M5 axle
bushings  3–10  —  OD 5–14  press fit OD − 0.1

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- McMaster-Carr: Mounted bearings (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/mounted-ball-bearings/
- McMaster-Carr: Sleeve bearings (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/sleeve-bearings/
- OpenBuilds: Solid V wheel kit — web, STEP — OpenBuilds site [verify license at link] — https://openbuildspartstore.com/solid-v-wheel-kit/
- Wikipedia: Plain bearing — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Plain_bearing
- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 13 parts): https://xemstudio.com/files/hardware/bearing-housings-and-rod-supports/index.json
API: https://xemstudio.com/api/geometry?object=bearing-housings-and-rod-supports