Answer
Jimlar ƙaura $\delta_{total}$ shine jimlar izinin farko, karkatar da zobe, da nakasar tsagi. $\delta_{total} = (W - t) + \frac{P}{k_{ring}} + \frac{P}{k_{groove}}$, inda $W$ shine fadin tsagi kuma $t$ shine kaurin zobe. Idan tsagi ya yi fadi da yawa, zobe na iya ' karkatar da hankali', wanda ke ƙara tasiri mai tasiri kuma yana rage wurin tuntuɓar. Wannan karkatarwar yana haifar da rarraba matsa lamba mara tsari $p(x) $, wanda zai iya wuce ƙarfin yawan amfanin ƙasa a gefen waje. Don daidaitattun majalisu, 'ƙarshen-wasa' an rage ta ta amfani da zobba masu kauri ko shims don cimma daidaiton 'snug'.