607 bearing dimensions
A 607 bearing is 7 mm bore × 19 mm outside diameter × 6 mm wide (0.276 × 0.748 × 0.236 in). The sealed version is 607-2RS; the shielded version is 607-ZZ.
607 at a glance
Boundary dimensions in millimetres and inches, and the common closure designations.
- Bore, d
- 7 mm 0.2756"
- Outside diameter, D
- 19 mm 0.7480"
- Width, B
- 6 mm 0.2362"
- Section height, (D − d)/2
- 6 mm 0.2362"
- Series
- 60 series extra-light
- Bore code
- 7 Under 10 mm bore the last digit is the bore itself: 7 = 7 mm
- Sealed, both sides
- 607-2RS
- Shielded, both sides
- 607-ZZ
- Open
- 607 no closures; any version may add C3 for extra internal clearance
Reading the number 607
Every deep groove ball bearing number follows the same pattern: type, dimension series and bore code, then suffixes.
Seals, shields and suffixes
Suffixes add closures and internal clearance. They do not change the boundary dimensions: a sealed and an open bearing of the same number are interchangeable in size.
| Suffix | Meaning | 607 example |
|---|---|---|
| Open (no suffix) | No seals or shields. Can be relubricated, or run in an oil bath; the housing needs its own seal against dirt. | 607 |
| Z | One metal shield, on one side only. | 607-Z |
| ZZ, 2Z | Metal shields on both sides. Non-contact, so low friction; keeps out larger dirt. Usually greased for life. | 607-ZZ |
| RS | One rubber contact seal, on one side only. | 607-RS |
| 2RS, 2RS1, 2RSH, 2RSR, DDU, LLU | Rubber contact seals on both sides. Better than shields against fine dirt and splashing water, with a little more friction. Usually greased for life. | 607-2RS |
| C3 | Radial internal clearance greater than normal (CN). Used with tight shaft or housing fits, or where the inner ring runs hotter than the outer ring. | 607-2RS C3 |
607 in other brands
The sealed and shielded versions as each maker writes them. All share the same boundary dimensions.
| Maker | Sealed both sides | Shielded both sides |
|---|---|---|
| SKF | 607-2RSH | 607-2Z |
| FAG (Schaeffler) | 607-2RSR | 607-2ZR |
| NSK | 607DDU | 607ZZ |
| NTN | 607LLU | 607ZZ |
| Koyo (JTEKT) | 607-2RS | 607ZZ |
| Timken | 607-2RS | see catalogue |
Seal designs and suffixes vary by maker, size range and product generation, for example contact versus low-friction seals. Confirm the exact designation in the maker's catalogue before ordering.
Same 7 mm bore, other series
Bearings that fit the same shaft. A heavier series carries more load in a bigger housing bore; a thin-section series saves space and weight.
| Bearing | Series | OD | Width | Section | vs 607 |
|---|---|---|---|---|---|
| 607 | extra-light | 19 mm | 6 mm | 6 mm | this bearing |
| 627 | light | 22 mm | 7 mm | 7.5 mm | +3 mm OD, +1 mm wide |
Miniature bearings
Common questions
What size is a 607 bearing?
7 mm bore, 19 mm outside diameter and 6 mm wide, which is 0.276 × 0.748 × 0.236 in.
What does 2RS mean on a 607 bearing?
607-2RS has rubber contact seals on both sides. 607-ZZ (also written 607-2Z) has metal shields on both sides. Both have the same 7 × 19 × 6 mm dimensions.
Is 607-2RS the same as 607-ZZ?
They are the same size and interchangeable in a housing. The sealed 607-2RS keeps out fine dirt and water better; the shielded 607-ZZ runs with less friction.
What is the SKF equivalent of 607-2RS?
SKF writes it 607-2RSH; FAG 607-2RSR, NSK 607DDU, NTN 607LLU and Koyo 607-2RS. Check the maker's catalogue for the exact seal type.
What does the number 607 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: 7 = 7 mm.
Which bearings have the same bore as 607?
627 also have a 7 mm bore, with different outside diameters and widths.