Bucket shaft specification 80 * (220-860) mm high quality steel

  Excavator bucket shaft inner diameter 80mm model product:

80 * 210	80*220	80*230	80*240	80*250
80*260	80*270	80*280	80*290	80*300
80*400	80*410	80*420	80*430	80*450
80*460	80*470	80*480	80*490	80*500
80*510	80*530	80*540	80*560	80*570
80*580	80*610	80*650	80*700	80*800

analysis of bucket shaft of excavator working device (1) the fit gap between bucket shaft and shaft sleeve of excavator working device directly affects the reliability of work
If the fit clearance is too small, it is difficult to form a stable lubricating oil film, which is easy to cause wear and even fracture damage; Excessive fit clearance will affect the contact fatigue life
(2) The fitting clearance between the shaft and the shaft sleeve of the working device of the excavator shall at least ensure the formation of a stable lubricating oil film
The factors to be considered in determining the minimum fitting clearance include: the minimum safety value of the oil film thickness, the relative deflection deformation of the shaft in the shaft sleeve, the surface roughness of the shaft and the shaft sleeve, the second degree of the shaft in the shaft sleeve, the roundness of the inner ring of the shaft sleeve After assembly, the inner hole shrinkage of the shaft sleeve and the value of the reduction of the shaft sleeve clearance due to temperature rise (3) the interference between the shaft sleeve and the welding sleeve should be integrated (3) the interference between the shaft sleeve and the welding sleeve should comprehensively consider the internal hole shrinkage of the shaft sleeve restored to normal temperature after assembly and the actual operability of assembly
(4) In addition to the material, the surface hardness and roughness of the shaft should be considered in the design of the shaft
In particular, it is emphasized that the surface hardness of the shaft should be about 100 ~ 150HB greater than that of the shaft sleeve; The surface roughness Ra value of the shaft shall not be greater than 0
8μ m
The roughness Ra value of the inner surface of the shaft sleeve should not be greater than 1
6um
It is proposed that the primary consideration in the design of the shaft sleeve is its service life, and the lower PV value should be used as far as possible
At the same time, it is also proposed to strictly ensure the machining and assembly position tolerance of the shaft hole fitting pair and minimize the influence on the fitting clearance

Linqing Kangnai Machinery Manufacturing Co
, Ltd
, founded in 1999, is a professional manufacturer of excavator accessories integrating processing, heat treatment, R & D, sales and service
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The company specializes in producing excavator accessories, Excavator bearing, shaft sleeve and bucket shaft www
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