Pump Shaft Bearing Conventional shaft bearings are made of high carbon chromium bearing steel (GCr15) for use with steels (including shafts, outer rings, and ball bearings). Because the high-quality bearing steel smelting through vacuum deoxidation, electromagnetic stirring, less oxide content, can withstand greater contact stress at the same time can withstand large high tensile stress, through the heat treatment, the shaft hardness For 58-62HRC. At the ring raceway hardness of 60-64HRC, ball and roller hardness of 61-65HRC.
　　
If the pump shaft cracks or heavy wear on the surface, when the centrifugal pump shaft strength should be replaced when the new shaft. If the pump shaft slightly bent or slightly worn, hooks, etc., should be repaired. So, what are the repair methods of the pump shaft?
　　
1, shaft hook and wear repair
　　
The use of sliding bearing shaft journal, due to poor lubrication or lubricating oil into the iron, sand and so make the pump shaft journal abrasion or grinding out the groove marks, rubber bearings at the journal wear, etc., generally used in plating , Copper, plated stainless steel for repair, and then processed into a standard diameter by car or mill method.
　　
2, repair the pump shaft bending
　　
On the smaller diameter of the shaft can be padded in the bending copper, with a hand hammer beating straightening; on the larger diameter, not serious bending axis can be calibrated with a screw calibrator.
　　
3, the shaft thread repair
　　
Pump shaft end of the thread damage can be used when the mild file damage thread file repair and continue to use. If the damage is serious, first pump the small end of the car, and then pressure on a bushing, bushing on the car out of thread; also available electricity, gas welding in the pump shaft thread surfacing, and then turning the thread.
　　
4, keyway repair
　　
If the keyway surface is rough, and damage is not serious, the file can be repaired light. If the damage is heavy, the old tank can be repaired, another open new slot elsewhere, but the transmission shaft of larger power must be replaced with a new shaft.
　　
If the pump shaft cracks or heavy wear on the surface, when the centrifugal pump shaft strength should be replaced when the new shaft. If the pump shaft slightly bent or slightly worn, hooks, etc., should be repaired. So, what are the repair methods of the pump shaft?
　　
1, shaft hook and wear repair
　　
The use of sliding bearing shaft journal, due to poor lubrication or lubricating oil into the iron, sand and so make the pump shaft journal abrasion or grinding out the groove marks, rubber bearings at the journal wear, etc., generally used in plating , Copper, plated stainless steel for repair, and then processed into a standard diameter by car or mill method.
　　
2, repair the pump shaft bending
　　
On the smaller diameter of the shaft can be padded in the bending copper, with a hand hammer beating straightening; on the larger diameter, not serious bending axis can be calibrated with a screw calibrator.
　　
3, the shaft thread repair
　　
Pump shaft end of the thread damage can be used when the mild file damage thread file repair and continue to use. If the damage is serious, first pump the small end of the car, and then pressure on a bushing, bushing on the car out of thread; also available electricity, gas welding in the pump shaft thread surfacing, and then turning the thread.
　　
4, keyway repair
　　
If the keyway surface is rough, and damage is not serious, the file can be repaired light. If the damage is heavy, the old tank can be repaired, another open new slot elsewhere, but the transmission shaft of larger power must be replaced with a new shaft.
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