Bilya vintining xizmat qilish muddati odatda uning charchash muddati (L10 umri) bilan o'lchanadi, bu mahsulotning 90% ishdan oldin ishlay oladigan masofa yoki vaqt. ISO 3408-4 ga muvofiq, umrni hisoblash formulasi L10=(C/P)^3 × 10^6 aylanishdir, bu erda C nominal dinamik yuk (masalan, 10kN) va P - ish yuki (masalan, 2kN da 125 million aylanish). Asosiy ta'sir etuvchi omillarga quyidagilar kiradi: yuk va tezlik (tavsiya etilgan yuk Nominal qiymatning 70% dan kam yoki teng), moylash (har 1000 soatda mineral moy, har 3000-5000 soatda moylash) va o'rnatish aniqligi (parallellik xatosi bo'lishi kerak).<0.05mm/m, otherwise life will be reduced by 30%). Environmental factors such as high temperature (life coefficient 0.7 at >80 daraja ) yoki chang (hayot 40% ga qisqardi) himoya choralari orqali yumshatilishi kerak. Xizmat muddatini uzaytirish amaliyotiga oldindan yuklanishni muntazam ravishda tekshirish (har 6 oyda bir marta), lateral yuklardan qochish (suzuvchi tayanchlar yordamida) va nitridlangan po'lat simli simlardan foydalanish (xizmat muddatini 1,5-2 baravar oshiradi) kiradi. To'g'ri parvarishlash xizmat muddatini nazariy qiymatning 80% dan ortig'iga uzaytirishi mumkin.
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