TRB · NONLINEAR AXIAL MODEL

Tapered roller bearing setting and preload

The same bearing-to-setting workflow, with load-dependent axial deformation curves and an iterative equilibrium solver. Shaft and housing stiffness remain separate. This reduced model does not solve a full coupled stiffness matrix.

Independent interactive 3D demo · Turkish

Version 1.18.1 · Updated: 2026-10-29

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01 · BearingsComplete single-row products only

Bearing A

Product designation

Shaft seat tolerance[ISO]

Hub · housing bore tolerance[ISO]

Seat fits and manufacturing guidance

Bearing B

Product designation

Shaft seat tolerance[ISO]

Hub · housing bore tolerance[ISO]

Seat fits and manufacturing guidance

02 · Arrangement, loads and geometryLive calculation

Bearing arrangement

External axial force direction

Radial force Fr[kN]

Axial force Fa[kN]

Shaft speed[r/min]

Radial reaction method

Bearing mid-plane span L[mm]

Radial load position x[mm]

Additional bending moment M[kN·mm]

Radial reaction at A[kN]

Radial reaction at B[kN]

03 · Nonlinear axial responseUser-supplied curves · iterative solution

Operating tangent stiffness Kn[kN/mm]

Operating effects

Supply bearing-only pure-axial force–deformation data for cold assembly and operating conditions. Columns: force [kN]; deformation [mm], one pair per line. Start at the physical zero-contact datum 0;0. Do not manufacture an origin for offset data or paste Kzz/tangent stiffness values. No extrapolation or automatic product curves.

Bearing A

Cold assembly curve[kN; mm]

Operating curve[kN; mm]

Data source / conditions

Bearing B

Cold assembly curve[kN; mm]

Operating curve[kN; mm]

Data source / conditions

Shaft axial stiffness[kN/mm]

Housing axial stiffness[kN/mm]

Ks and Kh describe the structural load path only. Use relative A–B interface movement, not peak total deformation. Keep bearing contact compliance out of these values.

Force comes from curve deformation and equilibrium. Kn is the local slope after convergence, not a multiplier for total closure. Cold/operating curves are interpolated at equal force during the temperature animation. A matching SimPro response adds combined speed/radial effects inside its recorded domain. Other constructions use the pure-axial curve model.

04 · Temperature and expansion

Assembly temperature[°C]

Thermal calculation

Operating shaft temperature[°C]

Operating housing temperature[°C]

Effective shaft length[mm]

Effective housing length[mm]

Shaft expansion coefficient[10⁻⁶/K]

Housing expansion coefficient[10⁻⁶/K]

Ring and fit temperature correction

Ring-expansion correction[mm]

Fit-change correction[mm]

Total thermal setting change[mm]

Thermal transition & bearing loads

Overview shows the whole diagram. Enlarge it to read labels; swipe horizontally when enlarged.

Temperature transition 100%

The slider interpolates temperature, not elapsed time or a thermal simulation. Once calculable, the cold assembly setting stays fixed throughout the transition; it is never redesigned at each frame. External loads stay constant. Section shapes are schematic. Read numerical displacements below; no physical deformation scale is implied.

05 · Construction and design checksNot a target preload/endplay input

A-side compliance share λ[0–1]

Check full load at cold start

Assembly-setting tolerance ±[mm]

Thermal-change uncertainty ±[mm]

Minimum basic rating life[h]

Minimum static safety s₀[—]

Oil viscosity grade[ISO VG]

Contamination factor ηc[0–1]

Manufacturing setting step[µm]

Cold-setting search range

Search minimum (cold)[mm]

Search maximum (cold)[mm]

Setting selection criterion

Minimum roller contact pressure[MPa]

Setting step and tolerance are separate. Positive setting = endplay; negative setting = axial interference. The search compares the load-zone life (roller load distribution at each setting, times ISO 281 aISO from the oil grade, the warmer ring temperature and ηc) at nine operating tolerance samples and cold assembly checks; the ISO 281 basic L10h is shown next to it. The manufacturing step defaults to 10 µm.

Values update as you edit. Calculations stay in your browser.

Tapered roller bearing setting and preload

Thermal transition & bearing loads

Results · setting and loads

Engineering results report