# 606 bearing dimensions

A 606 bearing is 6 mm bore × 17 mm outside diameter × 6 mm wide (0.236 × 0.669 × 0.236 in). The sealed version is 606-2RS; the shielded version is 606-ZZ.

## 606 data

- Type: deep groove ball bearing, 60 series (extra-light)
- Bore d: 6 mm (0.2362 in)
- Outside diameter D: 17 mm (0.6693 in)
- Width B: 6 mm (0.2362 in)
- Bore code: Under 10 mm bore the last digit is the bore itself: 6 = 6 mm
- Sealed: 606-2RS; shielded: 606-ZZ; open: 606

## Designations by maker

| Maker | Sealed | Shielded |
|---|---|---|
| SKF | 606-2RSH | 606-2Z |
| FAG (Schaeffler) | 606-2RSR | 606-2ZR |
| NSK | 606DDU | 606ZZ |
| NTN | 606LLU | 606ZZ |
| Koyo (JTEKT) | 606-2RS | 606ZZ |
| Timken | 606-2RS | see catalogue |

## Same 6 mm bore, other series

| Bearing | Series | OD mm | Width mm |
|---|---|---|---|
| 606 | extra-light | 17 | 6 |
| 626 | light | 19 | 6 |


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

## FAQ

**What size is a 606 bearing?**
6 mm bore, 17 mm outside diameter and 6 mm wide, which is 0.236 × 0.669 × 0.236 in.

**What does 2RS mean on a 606 bearing?**
606-2RS has rubber contact seals on both sides. 606-ZZ (also written 606-2Z) has metal shields on both sides. Both have the same 6 × 17 × 6 mm dimensions.

**Is 606-2RS the same as 606-ZZ?**
They are the same size and interchangeable in a housing. The sealed 606-2RS keeps out fine dirt and water better; the shielded 606-ZZ runs with less friction.

**What is the SKF equivalent of 606-2RS?**
SKF writes it 606-2RSH; FAG 606-2RSR, NSK 606DDU, NTN 606LLU and Koyo 606-2RS. Check the maker's catalogue for the exact seal type.

**What does the number 606 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: 6 = 6 mm.

**Which bearings have the same bore as 606?**
626 also have a 6 mm bore, with different outside diameters and widths.

Source page: https://machinistcharts.com/bearing/606/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)