# Insulating firebrick 230 × 114 × 64 mm (9 × 4.5 × 2.5 in)

> What are the dimensions of an insulating firebrick?

- Category: Stirling engines › Heat & regenerator
- Kind: Hardware
- Basis: Standard straight brick 9 × 4.5 × 2.5 in (230 × 114 × 64 mm), IFB 23 grade rated 1260 °C
- Page: https://xemstudio.com/objects/insulating-firebrick/ · JSON: https://xemstudio.com/api/geometry?object=insulating-firebrick · Plain text: https://xemstudio.com/objects/insulating-firebrick/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- A standard straight insulating firebrick is 230 × 114 × 64 mm (9 × 4.5 × 2.5 in); the file is a plain box at that size.
- IFB 23 grade is rated to 1260 °C.
- I use one under the burner on my engines.

## Sizes

| brick | length_mm | width_mm | height_mm | max_temp_c |
|---|---|---|---|---|
| IFB straight | 230 | 114 | 64 | 1260 |

## Where the files are

- Wikipedia: [Mesh (scale)](https://en.wikipedia.org/wiki/Mesh_(scale)) — web — CC BY-SA 4.0 (text)
- Wikipedia: [Regenerative heat exchanger](https://en.wikipedia.org/wiki/Regenerative_heat_exchanger) — web — CC BY-SA 4.0 (text)
- Wikipedia: [Steel wool](https://en.wikipedia.org/wiki/Steel_wool) — web — CC BY-SA 4.0 (text)
- McMaster-Carr: [Wire cloth (free STEP per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/wire-cloth/) — STEP, PDF — McMaster-Carr site terms (verify at link)
- 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/insulating-firebrick/index.json

- firebrick-230x114x64: [STEP](https://xemstudio.com/files/hardware/regenerator-and-heat-materials/firebrick-230x114x64.step) · [STL](https://xemstudio.com/files/hardware/regenerator-and-heat-materials/firebrick-230x114x64.stl) — insulating firebrick (IFB) 9 × 4.5 × 2.5 in: 230 × 114 × 64 mm

## How it fits

### Connects to
- [Tea lights, maxi tea lights and votives (heat sources)](https://xemstudio.com/objects/tea-light-candles/): the burner sits on the brick

### Also needed
- [Ceramic standoff Ø10 × 20 mm, Ø4.3 hole (M4)](https://xemstudio.com/objects/ceramic-standoff/): hot-end spacing above the base

## Questions

**What size is a firebrick?**

A standard straight is 230 × 114 × 64 mm (9 × 4.5 × 2.5 in).

**How hot can insulating firebrick get?**

IFB 23 is rated to 1260 °C.

## Fits with

- [Ceramic standoff Ø10 × 20 mm, Ø4.3 hole (M4)](https://xemstudio.com/objects/ceramic-standoff/)
- [Tea lights, maxi tea lights and votives (heat sources)](https://xemstudio.com/objects/tea-light-candles/)
- [Regenerator cage for 2 in and 1.5 in tri-clamp spools (Ø47.5 and Ø34.8)](https://xemstudio.com/objects/regenerator-cage/)