What it is
A tolerance is the allowable variation on a dimension or property. It tells a factory how precise a feature must be — and how much variation is still acceptable.
Sourcing tip
Defaulting every dimension to ultra-tight tolerances raises cost without improving the product. Tighten interfaces that matter; use general tolerances elsewhere, and mark critical-to-quality features clearly.
Ready to source in the UK?
Post your project on Combinate and get quotes from manufacturers who speak your language.