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Four-row Cylindrical Roller Bearing
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Four-row cylindrical roller bearings are the one of the main bearings for rolling mills. They have compact structures and high stiffness, and can carry high radial loads but not axial loads. Because of inner rings with no ribs, inner and outer ring subassembly can be mounted respectively. Cleaning, inspecting and dismounting are very convenient.
Four-row cylindrical roller bearings are especially applied to rolling mills required high speed and precision, for example: wire mills, bar and shape mills, cold or hot sheet mills and cogging mills.
Brass solid cages or pin-type cages are mainly used in four-row cylindrical roller bearings.
Should any of these items be of interest to you, please let us know, we will be happy to send more details.
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Rolling mill bearings operation and Maintenance
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1. Operation
Rolling bearings are high precision bearings, should be careful when using them, especially maintain bearings and keep its surroundings clean; avoid strong hit; prevent getting rusty; regular inspection; timely add lubricant.
2. Maintenance
To make bearings have longer useful life, maximize its effectiveness; bearings must be regularly inspected and maintained. Any problems can be detected early, take appropriate measures before the bearing failure, thus reducing bearing failures causing economic losses on the production.
Bearing during operation, need to frequently check the temperature and status through the noise and vibration test. When it is at static state, check whether the lubricant is contaminated, or deteriorated, the seal is good or not; remember the location of outer loading zone when dismantling, rotating the outer ring 900 when re-install it. Check inner and outer ring raceway, ball, and cage damage status when cleaning bearing, and if the surface has fatigue spallation, it shows that the bearing has reached life limit, should be replaced.
3. Storage
Bearings are coated with rust inhibitor and wrapped with rust-proof paper before leave factory. Preferably stored in room temperature is around 200C, relative humidity below 60% and non-corrosive material place, do not directly placed on the ground. Bearings can not be laminated stacked, must be in horizontal position. Long-term preservation if it is over anti-rust period (12 months), need to be re-cleaned and coated with anti-rust oil and re-pack again. Bearing in handling process, should use lifting appliance or pallet to prevent the bearing damages in the handling process.
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1.Material:GCr15 , GCr15SiMn, GCr18Mo, G20CrNiMo, G20CrNi2Mo, G20Cr2Ni4, G10GrNi3Mo, G20Cr2Mn2Mo
2.ID:100mm~2000mm
3.ISO9001:2008
4.Precision level:P0,P6,P5,P4,SP, UP
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5.NN NJ NUP N NF NN FC FCO FCDP
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Contact:
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Annie Zhang
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