# Pillow block KP08 envelope with a 608 pocket

> What are the dimensions of a KP08 pillow block?

- Category: Hardware › Motion
- Kind: Hardware
- Basis: KP08 catalogue envelope (55 × 13 base, 15 mm centre height, M5 holes 42 apart) with a Ø22 pocket at the 608 OD
- Page: https://xemstudio.com/objects/pillow-block-kp08/ · JSON: https://xemstudio.com/api/geometry?object=pillow-block-kp08 · Plain text: https://xemstudio.com/objects/pillow-block-kp08/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 55 × 13 block with R3 rounded ends; a Ø22 pocket (608 OD) runs through the 13 mm thickness on an axis 15 mm above the base.
- Two Ø5.5 holes (M5 clearance) through the base, 42 mm apart.
- The file is 25 mm tall. The catalogue KP08 housing stands 29; the top 4 mm is not drawn on this file, so the Ø22 pocket breaks out through the top face as a 9.2 mm wide opening.
- The 608 sits in the Ø22 pocket and carries a Ø8 shaft; 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 |
|---|---|---|---|---|
| bearing pocket | Ø22 | 608 bearing | press | pillow-block-* |
| mounting holes | Ø5.5 | M5 screw clearance | designed | pillow-block-* |

## Sizes

| feature | value_mm |
|---|---|
| base | 55 × 13 |
| height (file) | 25 |
| centre height | 15 |
| bearing pocket | Ø22 through 13 |
| mounting holes | 2 × Ø5.5 at 42 |

## 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/pillow-block-kp08/index.json

- pillow-block-kp08: [STEP](https://xemstudio.com/files/hardware/bearing-housings-and-rod-supports/pillow-block-kp08.step) · [STL](https://xemstudio.com/files/hardware/bearing-housings-and-rod-supports/pillow-block-kp08.stl) — KP08 pillow block: 29 overall height, 15 mm centre height, 55 × 13 × 5 base, Ø28 boss, Ø22 pocket for a 608 bearing through the 13 width (3 mm wall over it), two Ø5.5 (M5 clearance) holes 42 mm apart

## How it fits

### Goes in or on
- [Metric shafts Ø3 to Ø10 with D-flats and clip grooves](https://xemstudio.com/objects/metric-shafts/): Ø8 shaft through the 608

### Connects to
- [608 ball bearing](https://xemstudio.com/objects/608-bearing/): 608 OD in the Ø22 pocket

### Alternatives
- [Flange block KFL08 envelope with a 608 pocket](https://xemstudio.com/objects/flange-block-kfl08/): same 608 pocket, bolts to a wall

### Also needed
- [Set-screw shaft collars Ø3 to Ø12](https://xemstudio.com/objects/shaft-collars/): Ø8 collar each side locates the shaft

## Questions

**What are KP08 dimensions?**

55 × 13 base, Ø8 shaft 15 mm above the base, two M5 holes 42 mm apart. This file is 25 tall with a Ø22 pocket for a 608.

**What bearing goes in the KP08 file?**

A 608 (8 × 22 × 7) in the Ø22 pocket.

## Fits with

- [Flange block KFL08 envelope with a 608 pocket](https://xemstudio.com/objects/flange-block-kfl08/)
- [608 ball bearing](https://xemstudio.com/objects/608-bearing/)
- [Metric shafts Ø3 to Ø10 with D-flats and clip grooves](https://xemstudio.com/objects/metric-shafts/)
- [Set-screw shaft collars Ø3 to Ø12](https://xemstudio.com/objects/shaft-collars/)
- [SK8 rod support for Ø8 rods](https://xemstudio.com/objects/rod-support-sk8/)