What does the calculated force represent?

It is the idealized axial sliding resistance F = p × π × d × L × μ for the stated uniform elastic fit. It is not a guaranteed puller load or peak breakaway force.

What friction coefficient should I use?

Use a coefficient validated for the actual material pair, surface condition, lubricant, contact pressure and whether breakaway or sliding resistance is required. The result is directly proportional to μ.

Hur kan jag minska borttagningskraften?

Värm den yttre ringen (eller huset) för att expandera den, eller kyl axeln. Oljeinsprutning genom ett spår kan också skapa en hydraulisk utlösning. Specialbyggda lageravdragare fördelar kraften jämnt.

What geometry does the Lamé model require?

Dr must be the actual outer material boundary of the fitted thick ring. Do not substitute the overall outside diameter of an assembled rolling bearing; its outer ring and rolling elements are not a continuous hub around the shaft fit.

Can this result determine bearing reuse?

No. Reuse requires inspection and acceptance criteria from the bearing or machine manufacturer. The force estimate cannot reveal raceway damage, fretting, corrosion, plastic deformation or contamination.

Gratis tekniskt verktyg #056

Kalkylator för lagerutdragningskraft (extraktion)

Estimate idealized axial sliding resistance for a same-material solid shaft and thick-walled fitted ring. Actual peak extraction force can differ substantially.

Lamé-ekvationerPresspassningUtdragskraft

Nominell borrning d (mm)

Diametral interferens δ (mm, t.ex. 0,020)

Kontaktlängd (mm)

Fitted Ring Outer Diameter D_r (mm; ring material boundary)

Friktionskoefficient μ (validated breakaway/sliding value)

Youngs modul E (GPa; same material for shaft and ring)

Snabbförinställningar

Model boundary: same-material isotropic solid shaft and concentric thick-walled ring, uniform elastic interference and constant μ. Real peak extraction may include static breakaway, fretting, corrosion, shoulders, edge effects, misalignment and plasticity; use the component manufacturer’s method for tool sizing.

Resultat

Idealized Axial Sliding Resistance

—

Gränssnittstryck p

—

Ratio d/D_r

—

Equivalent tonne-force

—

Gränssnittstryck (Lamé)

Special case for a solid shaft and thick ring of the same isotropic material under the simplified open-ended elastic model:

δ — diametral interferens (mm)
d — nominell gränssnittsdiameter (mm)
D_r — actual outer material boundary of the fitted ring (mm), not overall bearing OD
E — Youngs modul (MPa)

Borttagningskraft

⚠️ Interpretation: F = pπdLμ is a uniform-contact friction estimate. No universal error band applies; uncertainty in geometry, interference after roughness, μ and interface condition must be evaluated for the actual removal process.

Kalkylator för lagerborttagningskraft | Lamé-ekvationer | Gratis onlineverktyg

Resultat

Gränssnittstryck (Lamé)

Borttagningskraft

Butik

Stöd

Kontakta