- Hello Customer - Log in or Register!
Actual measurements of the distribution geometry of the shaft and the bore of the appropriate size and shape, should be the same as when measuring the bearing temperatures. To ensure a high degree of practical tie effects, match the shaft and housing bore and bearing surface, roughness should be as small as possible.
TIMKEN roller bearing precision parts, are required when you use caution, not only changed the use of high-performance bearings, if used improperly, they are unable to achieve the desired performance test results, so bearing the following in mind:
Keep the bearings and the surrounding clean. Even the invisible dust bearing smiles, will increase the iron RAM bearing wear, vibration and noise.
When using the Setup does not allow strong washed carefully, not allowed with a hammer bearing, to allow the rolling force, a direct hit.
Use appropriate and accurate installation tools, special tools, avoid using fabric and staple fibers.
Prevent corrosion of TIMKEN bearings, the direct use of hand-selected bearings, full washing wash% 3C% 3E hands sweat, and coated with a high quality mineral oil, and then started again, paying particular attention to rust in the rainy season and summer.
Bearings in the host after installation, there is a metric called cyclic running accuracy. This change required to approximate repeats to a few representative cyclic running accuracy of "cycles", measure changes in quasi-periodic amplitude, cyclic running accuracy is poor. When you properly preload bearing spindle, this speed can be gradually increased to close to the speed, to achieve a TIMKEN bearing "break-in" effect, cycles of spindle running accuracy can be improved.
Are specifically described bearings installation method of verification for accuracy and comprehensive, beginning with TIMKEN bearings of spindle bearing mounted, installed accuracy check to go through the following four steps:
First of all, is to measure the dimensions of the shaft and housing bore to determine the fitting accuracy of the bearing. An interference fit inner ring and shaft, outer ring and the housing bore a clearance fit.
Second, fixed end Qian bearing in axis Shang of installed: will bearing with clean of cleaning kerosene for total cleaning, again with oil gun will quantitative of grease filled into bearing within; 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, with measurement started moment of method check by provides of pre-load is has significantly of changes.
Again, will bearing-axis combination body loaded seat hole: heating block hole makes warming 20~30℃, with continuous mitigation of pressure will bearing-axis combination body loaded seat hole; adjustment Qian cover, 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, 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.
Finally, 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.
There is the right choice, we must know the TIMKEN bearings under real load conditions, temperature, and other requirements, but it is actually very difficult. Therefore, in most cases are selected based on the use of the refining.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7219ADF NSK | 95 | 170 | 32 |
| 7019CDF NSK | 95 | 145 | 24 |