If a bench vice shows uneven clamping pressure, which maintenance step should be performed first?
Check jaw alignment and tighten mounting bolts
Uneven clamping means the two jaws of the bench vice are not meeting the work squarely or the body has shifted.
The first and simplest check is to inspect the jaw alignment and tighten the mounting bolts holding the vice to the bench.
Misaligned jaws or loose bolts let the vice rock or grip on one side, producing uneven pressure; correcting them usually restores even clamping.
Adding lubrication, shortening the handle, or replacing the whole vice are not the first, low-cost diagnostic step.
Hence, the answer is check jaw alignment and tighten mounting bolts.
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