Measurement of the top clearance in sliding bearings
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During the installation of sliding bearings, it is necessary to measure the clearances in various areas. I would like to ask the experts here: is it required to install copper shims at the joints when measuring the top clearance? What is the purpose if it is needed?
When initially measuring the top clearance, a feeler gauge is usually used for a rough estimate, followed by a more precise measurement using lead wires. Adding or removing shims at the contact point of the bearing shell cross-section involves adjusting the amount of shims as needed, based on the measured data, to meet the specified requirements. For reference.
As mentioned above, use a feeler gauge to determine the approximate gap, and then select an appropriate size for the wire; if the wire size isn’t quite right, consider using shims. I’m not sure if that’s the case
What you understand is different from what the person above considered.
A feeler gauge is used at the tile joint to determine the gap there; by subtracting the size of the feeler gauge from the measurements taken with a wire, the gap at the top of the tile can be determined
It seems the original poster is asking whether it’s possible to avoid using shims and instead measure by pressing a wire against the top of the shaft; your answer doesn’t address this question either. .
The tile joints can also be used without shims, but lead wire must be placed; otherwise, there is no way to make a comparison. How is the clearance at the top calculated? With shims, the data related to the tile joints are known directly, and only the lead wire at the top needs to be measured for comparison
If the gap between the tiles is too large and it’s not possible to press the wire in, shims must be used; under normal circumstances, no shims are needed
As I understand it, copper shims are added or removed depending on the relationship between the thickness of the wire and the clearance at the top, with the wire being compressed by between one-third and one-half of its original thickness. If this value is exceeded, a copper gasket must be placed on the mid-surface
I understand it’s the same way; if it exceeds the compression range of the wire, shims need to be added