It is advisable to preheat bearing inner ring or cones(never exceed 120ºC),with shaft in vertical position heated inner ring or cones can be slipped on and pressed or tapped up to shoulder or grease retainer.For the double rows of tapper roller bearings,its inner ring or corners,cup and spacer may be not interchangeable with similar assmblies of the same type bearings.
For type A,B,C,D,E bearing assembly,the single row tapper roller bearing should be adopted.
During assembly,axial gap in the end cover should be adjusted by means of shims,the value of axial gap should be corresponding with the following table.
Frame
A
B
C
D
E
F
End Play
0.05-0.15
0.1-0.2
0.15-0.25
0.18-0.28
0.4-0.6
0.5-0.6
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We can be in service from Mould ,Casting, Heat treatment ,Machining, Assembly,Testing etc. one dragon service. We have our Mould Workshop,there are Wooden Mould,Aluminum Mould,Lost Foam Casting Mould,Wax Mould etc. Naipu own Casting Workshop,mainly Sand Casting and Lost Foam Casting and Precision Casting. Naipu own Heat treatment Workshop, after out of furnace,the hardness are according to the technical requirement. Naipu own Machining Workshop,we are professional from rough machining to finish machining. Naipu own Assembly Workshop, our mechanicians are skilled in assemblying as we had about 30 years experience in this area. Naipu ownInspection Workshop, Every order every parts we will do the test before delivery.
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We have 15-30 QC inspectors,we test each pump and spare before delivery.