three row roller slewing bearing

three row roller slewing bearing needing preload is generally as angular contact ball bearings front bearing use.
triple row roller slewing bearing is generally used in groups, pre tightening in two ways,
1, bearing between the spacer sleeve, the top outer ring, inner ring with pressure pretightening nut.
2, at the end of main shaft side top outer ring, inner ring with a pre tightening nut pressure behind.

Methods 1 septum sleeve ends parallel precision must be very good. Mode 2, pressure ring side of the shaft is vertical to very good accuracy.
On the vertical accuracy requirements of bearing side with the thread of the locking nut is also high.
In addition, bearing must not install anti, anti loaded words bearing will be pressed powder.Note that the pre tension (or preload) must meet the requirements of bearing the instructions, otherwise it will damage the bearing.

Crane bearing and the ship crane bearing technical characteristics comparison

• Harbour mobile crane bearing.

The three row roller slewing bearing of port crane usually use internal or external toothing diameter 4 meters, to withstand overturning moment is very high.

• Stacker reclaimer and rotary bearing

Slewing bearing stacker reclaimer used usually adopts ball column combined type, three rows ofroller type and cross roller type, diameter of 3 meters most super. 

  Because of the poor working environment, dust, this kind of bearing has high carrying capacity, long service life, good sealingperformance characteristics. Considering the design of seal, uses the double sealing, plus steel protection sealing solution.

• The  ferris wheel bearing of large slewing bearing

LYHY bearings are used for the four point contact ball slewing bearing the ferris wheel.

• Ship unloader rotary bearing

Slewing bearing ship unloader with external teeth usually adopts three rows of rollers in structure,about 4-6 meters in diameter.

• Engineering machinery rotary bearing

Rotary bearing the most widely used most, generally not more than 4 meters in diameter, structure based on four point contact ball.

• Tower crane bearing

Application of rotary bearing the most concise, also called slewing bearings, ball and roller are to.

• Ladle Turntable Bearing

• Shield machine bearing 

The slewing bearing the most top application. High safety, high reliability, high stability, high value.

• Radar bearing

Belongs to the military bearing, is not introduced, quality is the first.