Needle bearing surface off the cause of abnormal

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Bearing part of the move surface material like fish scales fall off, a phenomenon known as fatigue spalling. Withstand a certain load, move the bearings during operation,
Even if the static load, but the balls and raceways purposes, but their stress cycle of reciprocat ion, material fatigue will occur to move so that the bearing life is reached. In addition,
Several kinds of bearings of the type defined in the "Life", one of which i.e. the so-called "working life", it means that a needle bearing can be achieved before the damage actual TING
Life by wear and tear, damage is usually not caused by fatigue, but by wear, erosion, damage to the seal causes.bearing suppliers

However, whether in laboratory testing or in actual use, can be significant to see that the appearance in the same work under the premise of the same bearing, very different from the actual life
. The life of the bearing revolutions (or the number of hours of work under a certain speed) Definition: within needle roller bearings in this life, in any of its bearing ring or move
Body on the initial fatigue damage (peeling or defect). Most of the bearings pumping b ad a lot of reasons - beyond the original estimate of load, an effective seal, over
The tight fit as a result of too small bearing clearance.

    Any factor of these factors has a special type of damage and will leave special signs of damage. To view the damage to the bearings, in most of the cases can be
To discover its possible causes, in general, one-third of the needle bearing damage due to fatigue damage, another one-third due to poor lubrication
The other one-third due to contaminants from entering the bearing or install mishandled.

However, these types of damage with Industry. For example, the pulp and paper industry is mostly because of poor lubrication or contamination caused by damage to the bearing and not because
Due to material fatigue.

Large metal noise

  Reason 1: abnormal load, countermeasures: correction with research bearing clearance, adjust the load, fix the housing should er block position.

  Reason 2: Install the adverse responses: axis, the machining accuracy of the housing, improve installation accuracy, installation method.

  Reason 3: Lack of lubricant or unsuitable responses: add lubricant to select the proper lubricant.

  Reason 4: rotating parts in contact, the contact part of the Solution: Modify the labyrinth seal.

Rules noise

  Reason 1: As the foreign body causing rolling surface indentation, corrosion or scars, countermeasures: Replace the bearings, cleaning the parts, to improve the sealing device, use a clean
Lubricant.

  Reason 2: (after carburizing steel) surface deformation Solution: replace the bearings, pay attention to its use.

  Cause 3: The raceway surface stripping, Solution: Replace the needle bearing.

Irregular noise

   Reason 1: The clearance is too large, Countermeasures: R esearch with the bearing clearance, modify the amount of preload.

   Reason 2: foreign invasion, countermeasures: replacement of bearings, cleaning the parts, to improve the sealing device, the use of clean lubricant.

   Reason 3: spherical injury, peel, Solution: Replace the bearings.

Abnormal temperature rise

   Reason 1: too much lubricant measures: reducing lubricant, used in moderation, choose the hard grease.thin section ball bearings

   Reason 2: Lack of lubricant or unsuitable responses: add lubricant to select the proper lubricant.

   Reason 3: abnormal load responses: changes along with research bearing clearance, adjust the pre-load, modify the position of housing shoulder block.

   Reason 4: poor installation, countermeasures: to improve the machining accuracy of shaft and housing, mounting accuracy, the installation method.
 
  Reason 5: creep, seal friction and the mating surface is too large, Solution: replace the needle roller bearings, with research, to modify the shaft and housing, to change the seal form.

The vibration (axis beating)

   Reason 1: (after carburizing steel) surface deformation responses: Note bearing replacement operation.

   Reason 2: Peel Solution: replace the bearings.

   Reason 3: Install adverse responses: modification the shaft housing shoulder block at right angles to the side of the liner straight angle.

   Reason 4: foreign invasion, Solution: replace the bearings, cleaning the parts, to improve the sealing device.

Excessive lubricant leakage, discoloration

  Reason: too much lubricant, foreign invasion, foreign body wear powder, measures: appropriate use of lu bricants, study the change in lubricant research and needle roller shaft
By Order of the replacement, cleaning the enclosure.