Spherical Roller thrust bearings

Spherical Roller Thrust Bearings

BMI Spherical rollers thrust bearings have specially designed raceways and accommodate large number of asymmetrical rollers.

This type can withstand very high axial load and also allow upto 2° misalignment.

BMI has the entire range in steel and brass cage. These bearings are manufacturing in normal accuracy for standard applications and for high running accuracy P6 are used

Applications:

• Extruders
• Screw Conveyors
• Blowout preventers
• Pumps

Size Range:

• 40 mm to 600mm

This type can withstand very high axial loads and also allow up to 2° of misalignment.

For any application engineering or other requests for large size  bearings feel free to contact us at sales@bmibearings.com

MAINTENANCE TIPS: Pump bearing failure

The second leading cause of pump breakdowns is bearing failures. This is due in part to the fact that fewer than 10 to 30 percent of all ball bearings run long enough to succumb to normal fatigue failure.

The function of the bearings in a centrifugal pump is to keep the shaft or rotor in correct alignment with the stationary parts under the action of radial and transverse (axial) loads. In most applications, the thrust bearings actually serve as both thrust and radial bearings.

Most bearings fail at an early age because of static overload, wear, corrosion, lubricant failure, contamination, or overheating. Particle contamination and corrosion-related failures account for 52 percent of all bearing failures.

Specific ways of reducing bearing failures and increasing bearing life:

• Excessive shaft fits increase bearing preload, which shortens bearing life.

• Do not cool the exterior of an antifriction bearing housing, since it will also cool the bearing outer race. This reduces internal radial bearing operating clearances, thereby increasing bearing load and reducing bearing life.

• Avoid damage due to external causes, such as vibration or stray electric currents (e.g., from a variable frequency drive).

• Avoid unequal flow of liquid into the two suction eyes of a split-case, double-suction pump due to improper suction piping arrangement, in order to minimize thrust load.

• Temperature differences between inner and outer bearing races increase preload.

Additionally, bearing housing seals—more specifically, the seal type—also play a crucial role in centrifugal pump bearing reliability.