# 6804 bearing dimensions

A 6804 bearing is 20 mm bore × 32 mm outside diameter × 7 mm wide (0.787 × 1.260 × 0.276 in). The sealed version is 6804-2RS; the shielded version is 6804-ZZ.

## 6804 data

- Type: deep groove ball bearing, 68 series (thin-section)
- Bore d: 20 mm (0.7874 in)
- Outside diameter D: 32 mm (1.2598 in)
- Width B: 7 mm (0.2756 in)
- Bore code: 04 × 5 = 20 mm (from 04 up, multiply by 5)
- Sealed: 6804-2RS; shielded: 6804-ZZ; open: 6804

## Designations by maker

| Maker | Sealed | Shielded |
|---|---|---|
| SKF | 6804-2RSH | 6804-2Z |
| FAG (Schaeffler) | 6804-2RSR | 6804-2ZR |
| NSK | 6804DDU | 6804ZZ |
| NTN | 6804LLU | 6804ZZ |
| Koyo (JTEKT) | 6804-2RS | 6804ZZ |
| Timken | 6804-2RS | see catalogue |

## Same 20 mm bore, other series

| Bearing | Series | OD mm | Width mm |
|---|---|---|---|
| 6804 | thin-section | 32 | 7 |
| 6904 | thin-section | 37 | 9 |
| 6004 | extra-light | 42 | 12 |
| 6204 | light | 47 | 14 |
| 6304 | medium | 52 | 15 |


Load ratings and speed limits vary by maker: take them from the manufacturer's catalogue.

## FAQ

**What size is a 6804 bearing?**
20 mm bore, 32 mm outside diameter and 7 mm wide, which is 0.787 × 1.260 × 0.276 in.

**What does 2RS mean on a 6804 bearing?**
6804-2RS has rubber contact seals on both sides. 6804-ZZ (also written 6804-2Z) has metal shields on both sides. Both have the same 20 × 32 × 7 mm dimensions.

**Is 6804-2RS the same as 6804-ZZ?**
They are the same size and interchangeable in a housing. The sealed 6804-2RS keeps out fine dirt and water better; the shielded 6804-ZZ runs with less friction.

**What is the SKF equivalent of 6804-2RS?**
SKF writes it 6804-2RSH; FAG 6804-2RSR, NSK 6804DDU, NTN 6804LLU and Koyo 6804-2RS. Check the maker's catalogue for the exact seal type.

**What does the number 6804 mean?**
6 is the deep groove ball bearing type, 8 is the thin-section dimension series, and 04 × 5 = 20 mm (from 04 up, multiply by 5).

**Which bearings have the same bore as 6804?**
6904, 6004, 6204, 6304 also have a 20 mm bore, with different outside diameters and widths.

Source page: https://machinistcharts.com/bearing/6804/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)