# 609 bearing dimensions

A 609 bearing is 9 mm bore × 24 mm outside diameter × 7 mm wide (0.354 × 0.945 × 0.276 in). The sealed version is 609-2RS; the shielded version is 609-ZZ.

## 609 data

- Type: deep groove ball bearing, 60 series (extra-light)
- Bore d: 9 mm (0.3543 in)
- Outside diameter D: 24 mm (0.9449 in)
- Width B: 7 mm (0.2756 in)
- Bore code: Under 10 mm bore the last digit is the bore itself: 9 = 9 mm
- Sealed: 609-2RS; shielded: 609-ZZ; open: 609

## Designations by maker

| Maker | Sealed | Shielded |
|---|---|---|
| SKF | 609-2RSH | 609-2Z |
| FAG (Schaeffler) | 609-2RSR | 609-2ZR |
| NSK | 609DDU | 609ZZ |
| NTN | 609LLU | 609ZZ |
| Koyo (JTEKT) | 609-2RS | 609ZZ |
| Timken | 609-2RS | see catalogue |

## Same 9 mm bore, other series

| Bearing | Series | OD mm | Width mm |
|---|---|---|---|
| 609 | extra-light | 24 | 7 |
| 629 | light | 26 | 8 |


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

## FAQ

**What size is a 609 bearing?**
9 mm bore, 24 mm outside diameter and 7 mm wide, which is 0.354 × 0.945 × 0.276 in.

**What does 2RS mean on a 609 bearing?**
609-2RS has rubber contact seals on both sides. 609-ZZ (also written 609-2Z) has metal shields on both sides. Both have the same 9 × 24 × 7 mm dimensions.

**Is 609-2RS the same as 609-ZZ?**
They are the same size and interchangeable in a housing. The sealed 609-2RS keeps out fine dirt and water better; the shielded 609-ZZ runs with less friction.

**What is the SKF equivalent of 609-2RS?**
SKF writes it 609-2RSH; FAG 609-2RSR, NSK 609DDU, NTN 609LLU and Koyo 609-2RS. Check the maker's catalogue for the exact seal type.

**What does the number 609 mean?**
6 is the deep groove ball bearing type, 0 is the extra-light dimension series, and under 10 mm bore the last digit is the bore itself: 9 = 9 mm.

**Which bearings have the same bore as 609?**
629 also have a 9 mm bore, with different outside diameters and widths.

Source page: https://machinistcharts.com/bearing/609/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)