Koyo 29318R Spherical Thrust Roller Bearing, 90 x 155 x 39 mm
Available
This Koyo spherical thrust roller bearing is designed to carry high axial loads, and can also support radial load as long as the radial load is no more than 55% of the axial load being carried. The spherical raceway on the housing race makes the bearing self-aligning, so it adjusts to axial inclination. It is not suitable for high-speed rotation and is normally used with oil lubrication.
The range has 2 sizes, with bores of 85 and 90 mm, boundary dimensions to JIS B 1512 and tolerances to JIS B 1514-2 class 0. Koyo bearings are made by JTEKT Corporation.
Where this product is used
- Hydroelectric generators and vertical motors
- Propeller shafts for ships
- Screw down speed reducers
- Jib cranes
- Coal mills, pushing machines and molding machines
Features
- Carries high axial loads, and radial load up to 55% of the axial load
- Self-aligning: allowable aligning angle 0.035 to 0.052 rad (2° to 3°) in general, depending on series
- Not suitable for high-speed rotation; normally oil lubricated
- Copper alloy machined cage (supplementary code FY)
- Basic dynamic axial load ratings 321 to 330 kN and static 1,000 to 1,050 kN depending on size
- Boundary dimensions to JIS B 1512, tolerances to JIS B 1514-2 class 0
Key specifications
| Specification | Detail |
|---|---|
| Bearing type | Spherical thrust roller bearing, single direction |
| Bore diameter d | 85 to 90 mm |
| Outside diameter D | 150 to 155 mm |
| Height T | 39 mm |
| Basic dynamic axial load rating Ca | 321 to 330 kN |
| Basic static axial load rating C0a | 1,000 to 1,050 kN |
| Limiting speed, oil lubrication | 2,500 to 2,600 min-1 |
| Mass | 2.87 to 3.06 kg |
| Standard cage | Copper alloy machined (FY) |
| Allowable aligning angle | 0.035 to 0.052 rad (2° to 3°) in general, depending on series |
| Dimensions and tolerances | JIS B 1512 (boundary dimensions), JIS B 1514-2 class 0 (tolerances) |
| Brand | Koyo (JTEKT) |
Available sizes
| Designation | Bore d (mm) | Outer D (mm) | Height T (mm) | r min (mm) | Ca (kN) | C0a (kN) | Speed, oil (min-1) | Mass (kg) |
|---|---|---|---|---|---|---|---|---|
| 29317R | 85 | 150 | 39 | 1.5 | 321 | 1,000 | 2,600 | 2.87 |
| 29318R | 90 | 155 | 39 | 1.5 | 330 | 1,050 | 2,500 | 3.06 |
Selecting the right option
Select by bore d first, then check the outside diameter D and height T in the table against your housing.
Dynamic equivalent axial load is Pa = 1.2 Fr + Fa, and static equivalent axial load is about P0a = 2.7 Fr + Fa, where Fr/Fa is 0.55 or less.
A certain degree of load is necessary for the bearing to operate satisfactorily. To prevent the rollers sliding on the raceway, mount the bearing without clearance and apply an axial load above the minimum necessary.
Fitting and use
The shaft shoulder diameter da and housing shoulder diameter Da in the variant specification cover the lengths of the rollers, so make the supporting surfaces square and wide enough.
Use oil lubrication, which is the normal arrangement for this bearing type.
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Koyo Spherical Thrust Roller Bearing, 293 Series: 90
SKU: A0157651 | Model: 29318R/KOYO
Koyo 29318R spherical thrust roller bearing, 90 x 155 x 39 mm, Ca 330 kN, limiting speed 2,500 min-1 (oil). Order online from AIMS Industrial.