# 6300 bearing dimensions

A 6300 bearing is 10 mm bore × 35 mm outside diameter × 11 mm wide (0.394 × 1.378 × 0.433 in). The sealed version is 6300-2RS; the shielded version is 6300-ZZ.

## 6300 data

- Type: deep groove ball bearing, 63 series (medium)
- Bore d: 10 mm (0.3937 in)
- Outside diameter D: 35 mm (1.3780 in)
- Width B: 11 mm (0.4331 in)
- Bore code: 00 = 10 mm (codes 00 to 03 are fixed: 10, 12, 15 and 17 mm)
- Sealed: 6300-2RS; shielded: 6300-ZZ; open: 6300

## Designations by maker

| Maker | Sealed | Shielded |
|---|---|---|
| SKF | 6300-2RSH | 6300-2Z |
| FAG (Schaeffler) | 6300-2RSR | 6300-2ZR |
| NSK | 6300DDU | 6300ZZ |
| NTN | 6300LLU | 6300ZZ |
| Koyo (JTEKT) | 6300-2RS | 6300ZZ |
| Timken | 6300-2RS | see catalogue |

## Same 10 mm bore, other series

| Bearing | Series | OD mm | Width mm |
|---|---|---|---|
| 6800 | thin-section | 19 | 5 |
| 6900 | thin-section | 22 | 6 |
| 6000 | extra-light | 26 | 8 |
| 6200 | light | 30 | 9 |
| 6300 | medium | 35 | 11 |


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

## FAQ

**What size is a 6300 bearing?**
10 mm bore, 35 mm outside diameter and 11 mm wide, which is 0.394 × 1.378 × 0.433 in.

**What does 2RS mean on a 6300 bearing?**
6300-2RS has rubber contact seals on both sides. 6300-ZZ (also written 6300-2Z) has metal shields on both sides. Both have the same 10 × 35 × 11 mm dimensions.

**Is 6300-2RS the same as 6300-ZZ?**
They are the same size and interchangeable in a housing. The sealed 6300-2RS keeps out fine dirt and water better; the shielded 6300-ZZ runs with less friction.

**What is the SKF equivalent of 6300-2RS?**
SKF writes it 6300-2RSH; FAG 6300-2RSR, NSK 6300DDU, NTN 6300LLU and Koyo 6300-2RS. Check the maker's catalogue for the exact seal type.

**What does the number 6300 mean?**
6 is the deep groove ball bearing type, 3 is the medium dimension series, and 00 = 10 mm (codes 00 to 03 are fixed: 10, 12, 15 and 17 mm).

**Which bearings have the same bore as 6300?**
6800, 6900, 6000, 6200 also have a 10 mm bore, with different outside diameters and widths.

Source page: https://machinistcharts.com/bearing/6300/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)