Machining Allowance

Machining Allowance Points : Machining Allowance or Finishing Allowance Machining allowance is the extra material added to certain parts of the casting to enable their finishing or machining to the required size. The amount of machining allowance to be provided for is affected by.

1. The functional requirements of the casting and the degree of accuracy and finish required.
2. Size and shape of the casting.
3. The characteristics of the metal.
4. The method of moulding and casting used, viz, hand moulding machine moulding sand casting or metal mould casting,
5. The casting orientation, greater allowance is required on the sure at the top in the mould.