# 6809 bearing dimensions

A 6809 bearing is 45 mm bore × 58 mm outside diameter × 7 mm wide (1.772 × 2.283 × 0.276 in). The sealed version is 6809-2RS; the shielded version is 6809-ZZ.

## 6809 data

- Type: deep groove ball bearing, 68 series (thin-section)
- Bore d: 45 mm (1.7717 in)
- Outside diameter D: 58 mm (2.2835 in)
- Width B: 7 mm (0.2756 in)
- Bore code: 09 × 5 = 45 mm (from 04 up, multiply by 5)
- Sealed: 6809-2RS; shielded: 6809-ZZ; open: 6809

## Designations by maker

| Maker | Sealed | Shielded |
|---|---|---|
| SKF | 6809-2RSH | 6809-2Z |
| FAG (Schaeffler) | 6809-2RSR | 6809-2ZR |
| NSK | 6809DDU | 6809ZZ |
| NTN | 6809LLU | 6809ZZ |
| Koyo (JTEKT) | 6809-2RS | 6809ZZ |
| Timken | 6809-2RS | see catalogue |

## Same 45 mm bore, other series

| Bearing | Series | OD mm | Width mm |
|---|---|---|---|
| 6809 | thin-section | 58 | 7 |
| 6909 | thin-section | 68 | 12 |
| 6009 | extra-light | 75 | 16 |
| 6209 | light | 85 | 19 |
| 6309 | medium | 100 | 25 |


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

## FAQ

**What size is a 6809 bearing?**
45 mm bore, 58 mm outside diameter and 7 mm wide, which is 1.772 × 2.283 × 0.276 in.

**What does 2RS mean on a 6809 bearing?**
6809-2RS has rubber contact seals on both sides. 6809-ZZ (also written 6809-2Z) has metal shields on both sides. Both have the same 45 × 58 × 7 mm dimensions.

**Is 6809-2RS the same as 6809-ZZ?**
They are the same size and interchangeable in a housing. The sealed 6809-2RS keeps out fine dirt and water better; the shielded 6809-ZZ runs with less friction.

**What is the SKF equivalent of 6809-2RS?**
SKF writes it 6809-2RSH; FAG 6809-2RSR, NSK 6809DDU, NTN 6809LLU and Koyo 6809-2RS. Check the maker's catalogue for the exact seal type.

**What does the number 6809 mean?**
6 is the deep groove ball bearing type, 8 is the thin-section dimension series, and 09 × 5 = 45 mm (from 04 up, multiply by 5).

**Which bearings have the same bore as 6809?**
6909, 6009, 6209, 6309 also have a 45 mm bore, with different outside diameters and widths.

Source page: https://machinistcharts.com/bearing/6809/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)