Calibrating the bearing bore after mounting
(Only applies to P1 plain bearings)
Calibration
KS PERMAGLIDE® plain bearings are ready to install on delivery, and should only be calibrated if a bearing clearance with a narrower tolerance cannot otherwise be reached.Attention:
Calibration considerably shortens the service life of KS PERMAGLIDE® P1 bushes (see Tab. 1).Figure 1 shows calibration using a mandrel. Table 1 contains standard values for the diameter of the calibrating mandrel dK. Precise values can only be ascertained through tests.
1 Calibrating mandrel, case hardening
depth Eht > 0.6, HRC 56 to 64
2 KS PERMAGLIDE® P10 bush
3 Housing
B Bush width l DiE Diameter of the bush in press-fit state l dK Diameter of the calibrating mandrel l r Edge, rounded
depth Eht > 0.6, HRC 56 to 64
2 KS PERMAGLIDE® P10 bush
3 Housing
B Bush width l DiE Diameter of the bush in press-fit state l dK Diameter of the calibrating mandrel l r Edge, rounded
Better possibilities
The bearing clearance tolerance can be reduced through the following measures, which do not adversely affect service life:- Narrower tolerances for housing bore
- Narrower shaft tolerances
Desired inside diameter of bush | Diameter of calibrating mandrel1) dK | Service life2) |
---|---|---|
DiE | - | 100% LN |
DiE+0.02 | DiE+0.06 | 80% LN |
DiE+0.03 | DiE+0.08 | 60% LN |
DiE+0.04 | DiE+0.10 | 30% LN |
Tab. 1: Standard values for the calibration mandrel diameter and the reduction in service life
DiE Inside diameter of the bush in press-fit state.
1) Standard value, based on steel housing.
2) Standard value for dry running.
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Application examples
Take a look at our application examples with KS PERMAGLIDE® plain bearings