Hvad er lejets statiske sikkerhedsfaktor s0?

Den statiske sikkerhedsfaktor s0 er forholdet mellem den grundlæggende statiske belastningsklassificering C0 og den faktiske statiske ækvivalente belastning P0. Den sikrer, at lejet ikke udsættes for permanent deformation under statiske belastninger eller stødbelastninger. s0 = C0 / P0.

What minimum s0 should I use?

Use the current guideline table of the exact bearing manufacturer. The value depends on ball/roller type, motion, load certainty, shock and the acceptable effect of permanent deformation or quiet-running requirement. This calculator does not assign a universal minimum.

Hvad sker der, hvis s0 er for lav?

Hvis s0 er under det anbefalede minimum, kan lejet udvikle permanente fordybninger (brinelling) i løbebanerne. Dette fører til øget støj, vibrationer og for tidlig udmattelsesbrud.

How do I determine P0?

Use the ISO 76 method or the current product table for the exact bearing. X0, Y0, applicability conditions and any radial/axial comparison depend on bearing type and design; do not use one generic equation for every bearing.

When should static load capacity be checked?

Check static capacity for stationary or slowly oscillating bearings and for peak, shock or impact loads, including peaks in otherwise rotating service. Dynamic rating-life analysis does not replace this check.

Gratis ingeniørværktøj #045

Beregner for statisk sikkerhedsfaktor for lejer

Calculate s₀=C₀/P₀ using catalog C₀ and a correctly determined P₀. Select the required minimum from current manufacturer guidance.

ISO 76:2006 + Amd 1:2017 s₀ = C₀/P₀ No Universal PASS/FAIL

Resultater

Statisk sikkerhedsfaktor s₀

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Statisk sikkerhedsfaktor

I henhold til ISO 76 er den statiske sikkerhedsfaktor forholdet mellem den grundlæggende statiske belastningsklassificering og den faktiske statiske ækvivalente belastning:

C₀ — grundlæggende statisk belastningsklassificering (kN), fra lejekataloget
P₀ — statisk ækvivalent belastning (kN), beregnet ud fra faktiske radiale og aksiale kræfter

Selecting the required factor

ISO 76:2006 specifies static ratings/equivalent load and includes guidance for heavily loaded applications. Manufacturer tables add application distinctions. Do not collapse them into a single ball/roller threshold.

ISO 76 calculations may be unsatisfactory for truncated contact, abnormal load distribution, misalignment, preload, extra-large clearance, coatings or special surface treatments. Consult the manufacturer in those cases.

Praktisk eksempel

Worked ratio example — stated catalog values

Givet: C₀ = 31,5 kN, P₀ = 12 kN, normal drift

s₀ = 31.5 / 12 = 2.63

Compare s₀=2.63 with the applicable current manufacturer guideline; this arithmetic alone does not establish PASS/FAIL.

ℹ️ Scope: Static capacity should also be checked for known peak, shock or impact loads in otherwise rotating service. Dynamic rating life does not replace the static check.