# SC8UU slide block for an LM8UU

> What are the dimensions of an SC8UU linear bearing block?

- Category: Hardware › Motion
- Kind: Hardware
- Basis: SC8UU catalogue envelope: 34 × 30 × 22, LM8UU at 11 mm, four M4 on 24 × 18
- Page: https://xemstudio.com/objects/slide-block-sc8uu/ · JSON: https://xemstudio.com/api/geometry?object=slide-block-sc8uu · Plain text: https://xemstudio.com/objects/slide-block-sc8uu/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**Exact dimensions.** Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part.

## Notes

- A 34 × 30 × 22 block with R2 edges. A Ø15 bore (LM8UU OD) runs the 30 mm length on an axis 11 mm above the base.
- Four Ø3.3 holes (M4 tap drill) run top to bottom on a 24 × 18 pattern.
- The LM8UU sits in the Ø15 bore and rides an Ø8 rod; the fit is listed under Mating features.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| LM8UU pocket | Ø15 | LM8UU OD | press | slide-block-* |
| mounting holes | Ø3.3 | M4 tap drill | designed | slide-block-* |

## Sizes

| feature | value_mm |
|---|---|
| block | 34 × 30 × 22 |
| bearing bore | Ø15 × 30 |
| centre height | 11 |
| holes | 4 × Ø3.3 (M4 tap) on 24 × 18 |

## Where the files are

- McMaster-Carr: [Mounted bearings (free STEP per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/mounted-ball-bearings/) — STEP, PDF — McMaster-Carr site terms (verify at link)
- McMaster-Carr: [Sleeve bearings (free STEP per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/sleeve-bearings/) — STEP, PDF — McMaster-Carr site terms (verify at link)
- OpenBuilds: [Solid V wheel kit](https://openbuildspartstore.com/solid-v-wheel-kit/) — web, STEP — OpenBuilds site (verify at link)
- Wikipedia: [Plain bearing](https://en.wikipedia.org/wiki/Plain_bearing) — web — CC BY-SA 4.0 (text)
- Long Earth Society: [Engine and rig builds](https://longearthsociety.com/engineering/) — web, video — LES site

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/slide-block-sc8uu/index.json

- slide-block-sc8uu: [STEP](https://xemstudio.com/files/hardware/bearing-housings-and-rod-supports/slide-block-sc8uu.step) · [STL](https://xemstudio.com/files/hardware/bearing-housings-and-rod-supports/slide-block-sc8uu.stl) — SC8UU slide block: Ø15 LM8UU pocket, 34 × 30 × 22, four Ø3.3 (M4 tap drill) holes on 24 × 18, 11 mm centre height

## How it fits

### Goes in or on
- [Linear rod Ø8 × 300](https://xemstudio.com/objects/linear-rod-8mm/): rides the Ø8 rod

### Connects to
- [LM8UU linear bearing Ø8 × Ø15 × 24](https://xemstudio.com/objects/lm8uu-bearing/): LM8UU OD in the Ø15 bore

### Alternatives
- [MGN9C/H, MGN12C/H and MGN15H carriages](https://xemstudio.com/objects/mgn-carriages/): rail carriage instead of rod and bushing

### Also needed
- [SK8 rod support for Ø8 rods](https://xemstudio.com/objects/rod-support-sk8/): holds the rod ends

## Questions

**What are SC8UU dimensions?**

34 × 30 × 22, LM8UU (Ø15) bore 11 mm above the base, four M4 holes on 24 × 18.

**What bearing goes in an SC8UU?**

One LM8UU (Ø8 × Ø15 × 24) in the Ø15 × 30 bore.

## Fits with

- [LM8UU linear bearing Ø8 × Ø15 × 24](https://xemstudio.com/objects/lm8uu-bearing/)
- [Linear rod Ø8 × 300](https://xemstudio.com/objects/linear-rod-8mm/)
- [SK8 rod support for Ø8 rods](https://xemstudio.com/objects/rod-support-sk8/)
- [MGN9C/H, MGN12C/H and MGN15H carriages](https://xemstudio.com/objects/mgn-carriages/)