noun
Technical term for mechanical interference or jamming, especially in engineering contexts where parts fit too tightly or obstruct each other.
部品の締め代が大きすぎると、組み立て時に干渉が起きる。
If the interference of the parts is too large, interference occurs during assembly.
設計者は適切な締め代を計算する必要がある。
The designer needs to calculate the appropriate interference.
干渉 is a broader term for interference in general (physical, radio, social), while 締め代 specifically refers to mechanical interference due to tight fitting.
Compound of 締め (shime, 'tightening') + 代 (shiro, 'allowance' or 'margin'). The reading しめしろ follows standard rendaku.