machining allowance การใช้

• The machining allowance varies drastically from one process to another.
• Also, the draft may provide enough of a machining allowance to begin with.
• To compensate for this, a machining allowance ( additional material ) should be given in the casting.
• Sand castings generally have a rough surface finish, therefore need a greater machining allowance, whereas die casting has a very fine surface finish, which may not need any machining tolerance.