INA forklift bearing abnormalities in simple daily maintenance - bearing knowledge
Contact fatigue failure refers to the INA bearing working surface under the role of alternating stress and failure.
Contact fatigue spalling occurred in forklift bearing working surface, often accompanied by fatigue crack, first of all, from the maximum cyclic shear stress under contact surface, and then extended to form a different flake shape, such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking.
Due to spalling surface expands gradually, and often to deep extension, forming deep spalling.
Deep spalling is & shy;
Contact fatigue failure of fatigue source.
Refers to the relative sliding friction between the surface abrasion failure lead to constant wear and tear of the working surface of the metal and the failure.
Continuous wear will cause INA bearing parts damaged gradually, and ultimately lead to forklift bearing size accuracy loss and other related problems.
Wear may affect the shape change, the increase of fit clearance and working surface morphology change, may affect the lubricant or make its pollution to a certain degree of lubrication function is lost, so that loss of bearing rotating accuracy and even can't is & shy;
1, when the bearing running to a period of time (
Or maintain a period)
All bearing down;
2, clean with clean diesel oil or kerosene soaking bearing, if you have open the sealing cover cleaning best technological conditions;
3, dry cleaning oil after cleaning, appearance inspection for damage;
4, with a 150 mm or so, INA bearing inner diameter equal diameter rods (
It is best to hollow tube)
, one end fixed a bearing;
5, rapidly rotating bearing at the same time with the hand, will stick (
At the other end against the ear microphone or audio amplifier on the apology to bearing rotation noise;
After 6, fixed bearing transverse strike sticks, check whether the bearing wear loose phenomenon;
7, loose, the rotation noise is too big, have serious defect of forklift bearings should be eliminated, with the same generation;
Eight, take a bucket will right amount of grease (
High quality p redictors oil)
Gently melting (
Do not overheat)
, will be tested bearing to no bubble overflow into the barrel.
Cooling before take out the bearing grease, residual grease quantity is little.
Cools remove the INA bearing grease, residual amount of grease.
According to the need to determine how much grease residues.
9, with a soft cloth or tissue wipe the grease outside forklift bearings on the same assembly to the pulley, the maintenance work is come to an end.