# 6910 bearing dimensions

A 6910 bearing is 50 mm bore × 72 mm outside diameter × 12 mm wide (1.969 × 2.835 × 0.472 in). The sealed version is 6910-2RS; the shielded version is 6910-ZZ.

## 6910 data

- Type: deep groove ball bearing, 69 series (thin-section)
- Bore d: 50 mm (1.9685 in)
- Outside diameter D: 72 mm (2.8346 in)
- Width B: 12 mm (0.4724 in)
- Bore code: 10 × 5 = 50 mm (from 04 up, multiply by 5)
- Sealed: 6910-2RS; shielded: 6910-ZZ; open: 6910

## Designations by maker

| Maker | Sealed | Shielded |
|---|---|---|
| SKF | 6910-2RSH | 6910-2Z |
| FAG (Schaeffler) | 6910-2RSR | 6910-2ZR |
| NSK | 6910DDU | 6910ZZ |
| NTN | 6910LLU | 6910ZZ |
| Koyo (JTEKT) | 6910-2RS | 6910ZZ |
| Timken | 6910-2RS | see catalogue |

## Same 50 mm bore, other series

| Bearing | Series | OD mm | Width mm |
|---|---|---|---|
| 6810 | thin-section | 65 | 7 |
| 6910 | thin-section | 72 | 12 |
| 6010 | extra-light | 80 | 16 |
| 6210 | light | 90 | 20 |
| 6310 | medium | 110 | 27 |


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

## FAQ

**What size is a 6910 bearing?**
50 mm bore, 72 mm outside diameter and 12 mm wide, which is 1.969 × 2.835 × 0.472 in.

**What does 2RS mean on a 6910 bearing?**
6910-2RS has rubber contact seals on both sides. 6910-ZZ (also written 6910-2Z) has metal shields on both sides. Both have the same 50 × 72 × 12 mm dimensions.

**Is 6910-2RS the same as 6910-ZZ?**
They are the same size and interchangeable in a housing. The sealed 6910-2RS keeps out fine dirt and water better; the shielded 6910-ZZ runs with less friction.

**What is the SKF equivalent of 6910-2RS?**
SKF writes it 6910-2RSH; FAG 6910-2RSR, NSK 6910DDU, NTN 6910LLU and Koyo 6910-2RS. Check the maker's catalogue for the exact seal type.

**What does the number 6910 mean?**
6 is the deep groove ball bearing type, 9 is the thin-section dimension series, and 10 × 5 = 50 mm (from 04 up, multiply by 5).

**Which bearings have the same bore as 6910?**
6810, 6010, 6210, 6310 also have a 50 mm bore, with different outside diameters and widths.

Source page: https://machinistcharts.com/bearing/6910/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)