noun
machining allowance; cutting stock
Technical term in machining and manufacturing: extra material intentionally left on a workpiece to be removed later, ensuring final dimensions can be met despite tolerances.
この部品は削り代を0.5ミリ残して粗加工してある。
This part has been rough-machined with a 0.5 mm machining allowance left.
削り代が足りないと、仕上げ加工で寸法が出せなくなる。
If the machining allowance is insufficient, the final dimensions cannot be achieved in finishing.
Compound of 削り (けずり, 'shaving' or 'cutting', the continuative form of 削る) and 代 (しろ, 'allowance' or 'margin'). The reading しろ for 代 is a specialized suffix meaning 'room' or 'allowance'.