29252 E spherical roller thrust bearing
Dimensions
d 260 mm D 360 mm
H 60 mm d1 ≈350 mm
D1 ≈302 mm B 19 mm
B1 57 mm C 30 mm
s 139 mm r1,2 min. 2.1 mm
Description
Dimensions of 29252 E spherical roller thrust bearing
The boundary dimensions of 29252 E spherical roller thrust bearing conform with ISO 104:2002 standard.
Tolerances
The tolerances of 29252 E spherical roller thrust bearing accord with the normal class of ISO 199:2005 standard but JCB height tolerances are tighter than the standard.
Tolerances of 29252 E spherical roller thrust bearing are tighter minimum 50% than ISO standard for the bearings with basic design.
Tolerances of 29252 E spherical roller thrust bearing is tighter 75% than ISO standard for enhanced spherical roller thrust bearings.
Relevant data were listed in Table 2.
Misalignment
The structure of 29252 E spherical roller thrust bearing features self-aligning, and can accommodate misalignment of the shaft relative to the housing which can be caused by shaft deflection ect (Fig.8).
The permissible misalignment is reduced as the load increases. Guideline values for misalignment and rotation of the shaft washer relative to the housing washer listed in table 1.
When designing bearing arrangements with rotating housing washer in combination with misalignment or when the shaft wobbles relative to the housing, contact JCB. Whether these values can be fully exploited depends on the design of the bearing arrangement and the external sealing design ect.
Quality
Composed of the engineers from design, technics, inspection and production, a quality assurance team was organized to summarize a pragmatic and effective quality solution, completely reach the goal on researching, stabilizing and continually improving quality. Whole-process quality control was carried out in bearing production, i.e. income quality control (IQC), process quality control (PQC), outgoing quality control (OQC). Metrological instruments as Projective Metroscope JD9A and measuring instruments as CMM Coordinate Measuring Machine RS-30 DCC etc can effectively control the product quality, make the outgoing products to fully meet standards, and additional accuracy are reserved further.
Impact Resistance Performance
In order to extend service life and accommodate working conditions, 29252 E spherical roller thrust bearing substantially improved the performance by optimizing the internal geometry and surface finish of all contact surfaces, combining the adoption of high standard steel with a salt bath quenching, perfecting the cage, roller profile and the geometry of the raceways.
Embodied in:
- Higher dynamic load carrying capacity
- Improved wear-resistance
- Reduced noise and vibration levels
- Less frictional heat
- Significantly extended bearing service life
Applications
Our products，29268 E spherical roller thrust bearing is extensively applied on the industries as marine gearbox, marine propeller shaft, industrial gearbox, plastic machinery, rubber machinery, rolling mill, crusher, tower crane, engineering machinery, construction machinery, oil rig, vertical motor, hydroelectric generator and so on.
Abutment dimensions
| da | min. | 310 | mm |
| Da | max. | 326 | mm |
| ra | max. | 2 | mm |
Calculation data
| Basic dynamic load rating | C | 817 | kN | |
| Basic static load rating | C0 | 3650 | kN | |
| Fatigue load limit | Pu | 345 | kN | |
| Reference speed | 1100 | r/min | ||
| Limiting speed | 1700 | r/min | ||
| Minimum axial load factor | A | 1.3 |
Mass
| Mass bearing | 18.5 | kg |
