Manual cutting methods are very common and generally performed in plants for jobs that require custom gaskets to be cut in the field. The material can be cut with a utility knife, scissors or shears
The dimensional tolerance of hand cut gaskets is based on the person cutting the gaskets, however, realistically the tolerance on most hand cut gaskets would be greater than +/- 3.2mm (1/8”). Additionally, with hand cut gaskets, there is usually more than one scribe or cut mark, which can potentially lead to jagged edges or nicks in the gasket, thus creating a weak point. Manual cutting is somewhat slow and tedious, and tends to result in a higher yield of gasket scrap or waste.