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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>TIMKEN import bearing and bearing hole measurement method TIMKEN imported bearing and bearing hole measurement method
First, the first dimension of TIMKEN imported bearings 1) TIMKEN imported bearing thickness: the outer diameter micrometer fixed probe from the plane to the spherical surface; can be used to measure the bearing thickness. TIMKEN imported bearing thickness should normally be controlled at 0. 005 ~ 0. 010 Within the millimeter scale; otherwise, the inner diameter of the TIMKEN imported bearing is too poor. The TIMKEN imported bearing has a slight decrease in the near opening. It is thirsty and æž³ æž³ (14). /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
2) TIMKEN imported bearing and bearing hole cooperation tightness: cooperation tightness is ensured by the free opening amount and residual height of TIMKEN imported bearings. Under the method of measuring the residual surface height: fit the bearing according to the rules; pay TIMKEN After the imported bearing cap bolt is tightened to the regular torque, loosen a bolt between them; use the feeler gauge to measure the gap at the bearing cap interface; the value should be within the range of 0. 05~0. 15 mm.
3) TIMKEN imported bearing inner diameter: Before the measurement, TIMKEN imported bearings should be assembled according to the rules and tighten the TIMKEN imported bearing cap bolts according to the regular torque; use the inner diameter gauge; measure the reference scale after the outer diameter micrometer; measure to avoid thinning Zone. The difference between the inner diameter of the TIMKEN bearing and the corresponding outer diameter of the journal is the cooperative clearance.
4) The coaxiality of the inner hole of the main TIMKEN bearing: the coaxiality error of the inner hole of the main bearing is mainly formed by the coaxiality error of the bearing hole; and the cause of the coaxiality error of the bearing hole is the deformation of the cylinder When the radial diameter of the main journal is in the normal civil service; check the bearing marks of the main journal and the TIMKEN imported bearing; if the main TIMKEN bearings are inconsistently inconsistent; the coaxiality error is large; It can be processed by scraping, boring TIMKEN imported bearings or replacing cylinders; otherwise it is difficult to ensure the normal operation of the engine.
Second, the measurement of the bearing hole can be measured by using the inner diameter gauge on the outer diameter micrometer to check the reference scale; together, the roundness and cylindricity of the bearing hole must be measured. Burning the TIMKEN bearing often makes the diameter of the bearing hole at the opening. Reduced and roundness is too poor; the normal operation of TIMKEN imported bearings is extremely suffocating. If the positioning of the connecting rod bolts is loose, the connecting bearing TIMKEN bearing cap will be displaced to make the bearing hole roundness out of tolerance. Degree errors should be controlled within the scale of public service; while cylindricity should be strictly controlled.
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Source: China Bearing Network Time: 2013-03-18