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Checking parallelism in vertical plane between two holes




Insert two shafts into the holes to be checked. Ensure no gaps between shafts and holes. Move the orange bar of a spirit level along the shafts.

The spirit level shows the error in parallelism between two holes in vertical plane (not in horizontal one).

Another way for checking (without the orange bar):

Put the spirit level directly on each blue shaft (along its length) and compare two values shown by the spirit level.




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