Pattern Allowances

Pattern Allowances Points : Pattern Allowances, What is a pattern allowance? Explain different allowances applied pattern The allowance given on the pattern size is called pattern allowance. It affects the dimensional characteristics of the casting. Thus, when the pattern is produced, certain allowances must be given on the sizes specified in the finished component drawing so that a casting with the particular specifications can be produced. The selection of correct allowances greatly helps to reduce machining costs and avoid rejections. The allowances usually considered on patterns and core-boxes are explained here.