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TIMKEN bearing installation process, bearing deformation is a very realistic situations engineers are most concerned about is how to accurately manipulate, if not manipulated properly may cause bearing damage. Installation should pay special attention to the co-ordination rotating rings must not be too loose, to prevent a season of eccentric vibration, and interface between fixed rings are not formed the gap, to prevent ring deformation under load and subject to induced vibration in high speed operation, and more so in the context of high temperature.
(1) measurement of the shaft and housing bore size to determine the fitting accuracy of the bearing to meet requirements are as follows:
Within ring and axis take had Ying tie, had Ying volume 0~+4 μ m (in light load, and high precision Shi for 0); outer ring and bearing block hole take gap tie, gap volume 0~+6 μ m (but in free end of bearing using corner contact ball bearing Shi, also can increases gap); axis and block hole surface round degrees errors in 2 μ m following, TIMKEN bearing by with across ring of end surface parallel degrees in 2 μ m following, axis shoulder within end face outside end surface of beat in 2 μ m following; bearing block hole retaining shoulder on axis of beat in 4 μ m following ; Axis of spindle Cap inner end face runout 4 μ m or less.
(2) fixed-end bearings on the shaft before installing
Will TIMKEN bearing with clean of cleaning kerosene for total cleaning, for fat lubrication, first will contains 3%~5% grease of organic solvent injected bearing for skim cleaning Hou, again with oil gun will quantitative of grease filled into bearing within (accounted for bearing space volume of 10%~15%); heating bearing makes warming 20~30℃, with hydraulic machine will TIMKEN bearing loaded into axis end; will tight will set pressure in axis Shang and to suitable of pressure arrived live bearing end surface makes its axis to positioning; will spring scale of strap volume in bearing outer ring Shang , Starting torque measurement method verifies that the required preload is a significant reduction from the change (even if the bearing is correctly, but as with deformation or cage, preload may also change).
(3) load the bearings-shaft Assembly seat hole
Heating block hole makes warming 20~30℃, with continuous mitigation of pressure will TIMKEN bearing-axis combination body loaded seat hole; adjustment Qian cover, makes Qian cover of tight solid volume for 0.02~0.05 μ m, to bearing block outside end surface for benchmark, will indicator of table head subject to in axis neck surface Shang, will axis rotating measurement its beat, requirements errors in 10 μ m following; will indicator positioning in axis Shang, table head subject to Hou block hole within surface, will axis rotating to measurement bearing block before and after block hole of with axis degrees.
(4) place the free end bearing selectively in location that may offset the bias, after you install the housing support, offsetting each other as much as possible deviation of roundness and concentricity deviation.
Shaft and bore roundness, perpendicularity by TIMKEN bearings and abutments of the corresponding precision requirements. We must rotate the rings combined with accurate calculation of interference, to accurately calculate the fixed amount of suitable tie rings.
Small fixed ring fits on the assumption that matched high shape accuracy for both surface and less crude, or causing installation problems removing more difficult, and in addition, you also need to consider the impact of thermal elongation of the main shaft.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7010ATYNSULP4 NSK | 50 | 80 | 16 |
| 7010A5TYNSULP4 NSK | 50 | 80 | 16 |