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>> Bearing Selection
Our bearing have developed kinds of bearing material According to difference work condition. The user can select the material base on bearing work environment, load, speed, wear resistance request, moving method, installation, the cost of the material etc.
>> Bearing Load:
• Cylindrical Bushes , Flange Bushes • Thrust Washer
P=F/d×L（N/mm2） P=4F/π×(D2－d2) N/mm2
As the factor of clearance, bushes chamfer, oil groove etc., The actually load (P act) is higher than theory of calculation (P mean)
>> Velocity:
• Rotating Motion • Reciprocating Motion
V=π×d×n/1000×60 (m/s ) V=2s×c/60 (m/s)
• Oscillating Motion
V=π×d×C×θ/1000×360×60（m/s）
>> PV
PV=P×V (N/mm2×m/s)
PV is the product of the specific bearing load P and the sliding speed V which is very important design data. We recommend design lower PV value will leads to longer service life. Also don't exceed the max of the material load, speed, temp and lower if possible.
SF bushes should be cleaned in kerosene or diesel oil first, immersed in engine oil and the dried up. When the bush is installed into housing, make sure the bush not rotating in the housing or moving in the axial direction and at the same time make the outer surface fully contact to the base hole, generally guarantee the contact area over 70%, thus to improve load capacity and transmission of the friction heat, The inner surface of the SF bush is made of self-lubricating plastic, the outer surface steel backing. The friction coefficient of steel to steel if bigger that of the steel to plastic, so we should choose the light-graded tight fit, preventing the axle sleeve from moving in the base when working, and also preventing the inner holes from getting deformed and too big because of the large tight fit of the outer diameter.
Out circle of the axle sleeve should be avoided in the high-pressure working conditions. Two methods are recommended here:
1. Increase the outer diameter meter of the axle sleeve, and the deformation of inner holes can be calibrated with calibrating core stick.
2. When installing, apply ZY801 Oxygen-hatred glue in the housing to strong then the combination strength between the axle sleeve and base hole.
For bush(outer diameter<55mm), press the bush into the housing gently and carefully using an core axle with a handle. Fig A
For bush(outer diameter>55mm), press the bush into the housing gently and carefully using a handle with a shoulder, an "O" ring and an assisting.
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