Koyo 6307 Deep Groove Ball Bearing, Open, 35 x 80 x 21 mm
Available
This Koyo deep groove ball bearing (open, 6300 series) is built on the most popular rolling bearing type. Deep, uninterrupted raceway grooves in the inner and outer rings carry radial load and a certain degree of axial load in either direction, at high speed. It is supplied open, with no shields or seals, so lubrication and sealing come from the housing and the application.
The range has 2 sizes, with bores from 35 to 50 mm, normal (CN) radial internal clearance and boundary dimensions to JIS B 1512. Koyo bearings are made by JTEKT Corporation.
Where this product is used
- Automotive: transmissions, electrical devices, and truck and trailer equipment
- Off-highway: construction equipment, agricultural equipment and railway rolling equipment
- Electrical equipment: standard motors and domestic electric appliances
- Measuring and medical instruments
- General industrial equipment
Features
- Deep, uninterrupted raceway grooves carry radial load and a certain degree of axial load in either direction
- Open construction, with lubrication and sealing provided by your housing design
- Boundary dimensions to JIS B 1512, tolerances to JIS B 1514-1
- Basic dynamic load ratings 33.4 to 62 kN and static 19.3 to 38.3 kN depending on size
- Standard cage by size: pressed steel
Key specifications
| Specification | Detail |
|---|---|
| Bearing type | Single row deep groove ball bearing |
| Series | 6300 |
| Sealing | Open |
| Radial internal clearance | Normal (CN) |
| Bore diameter d | 35 to 50 mm |
| Outside diameter D | 80 to 110 mm |
| Width B | 21 to 27 mm |
| Basic dynamic load rating Cr | 33.4 to 62 kN |
| Basic static load rating C0r | 19.3 to 38.3 kN |
| Limiting speed, grease lubrication | 6,100 to 8,500 min-1 |
| Limiting speed, oil lubrication | 7,300 to 10,000 min-1 |
| Dimensions and tolerances | JIS B 1512 (boundary dimensions), JIS B 1514-1 (tolerances) |
| Radial internal clearance standard | JIS B 1520 |
| Standard cage | Pressed steel, depending on size |
| Brand | Koyo (JTEKT) |
Available sizes
| Designation | Bore d (mm) | Outer D (mm) | Width B (mm) | r min (mm) | Cr (kN) | C0r (kN) | Speed, grease (min-1) | Speed, oil (min-1) |
|---|---|---|---|---|---|---|---|---|
| 6307 | 35 | 80 | 21 | 1.5 | 33.4 | 19.3 | 8,500 | 10,000 |
| 6310 | 50 | 110 | 27 | 2 | 62 | 38.3 | 6,100 | 7,300 |
Selecting the right option
Select by bore d first, then check the outside diameter D and width B in the table against your housing.
The basic dynamic load rating Cr relates to bearing life under rotating load, and the basic static load rating C0r to heavy or slow-turning duty. Compare the limiting speed for your size with the shaft speed. The speeds shown are the grease lubrication limits.
Fitting and use
Fit the ring that has the interference fit first, and press only on that ring, never through the balls.
Lubricate to suit the application, and keep the housing clean, because there is no shield or seal on the bearing.
Where axial load is large, make the shaft shoulder and housing shoulder larger than usual.
Related products
Also available from Koyo: the 6300 contact sealed range, the 6300 shielded range, the 6300 open C3 range and the 6000 open range.
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35 x 80 x 21mm bearing
Model Number: 6307/KOYO
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50 x 110 x 27mm bearing
Model Number: 6310/KOYO
