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sklademVydáno: 2017-04-25
BS ISO 13778:2017
Plain bearings. Quality assurance of thin-walled half bearings. Selective assembly of bearings to achieve a narrow clearance range
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| Označení normy: | BS ISO 13778:2017 |
| Počet stran: | 14 |
| Vydáno: | 2017-04-25 |
| ISBN: | 978 0 580 92912 0 |
| Status: | Standard |
DESCRIPTION
BS ISO 13778:2017
This standard BS ISO 13778:2017 Plain bearings. Quality assurance of thin-walled half bearings. Selective assembly of bearings to achieve a narrow clearance range is classified in these ICS categories:
- 21.100.10 Plain bearings
This document specifies the selective assembly of bearings (in accordance with ISO 3548‑1).
The bearing diametral clearance is determined by the housing diameter, journal diameter and the wall thickness of the two half bearings. Typically, these components will have a total tolerance “stack up” of 50 µm to 60 µm. Current engine development and in particular, the desire for improved engine refinement, has provided a need to decrease the clearance range due to the tolerance “stack up”. This document suggests various schemes of selective assembly to achieve such ranges.