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

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.

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.

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.

α, a, dimensions and load factors come from the selected SKF product. Elastic response is supplied separately by the user; no load rating or dimensionless factor is used as stiffness.

Canonical: https://www.yasarseher.com/trb-calculation/