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L-ring and W-ring End Play Compensation Calculator

Tolerance Stack
ΣΔ = sum of all component tolerances in the assembly stack.
ΣΔ Total stack
mm
Δa Groove tolerance
mm
L-Ring Data (from catalogue)
L Free height
mm
u Min compression
mm
u = residual clearance when ring cannot be fully flattened (from catalogue).
C Spring constant
N/mm
Assembly Dimensions (optional)
For groove width range calculation. Enter nominal ± tolerance for each component in the stack.
Σb_max Parts at max
mm
Σb_min Parts at min
mm
s_ring Ring own width
mm
L-rings are conical retaining rings acting as linear springs. Spring constant C is proportional to E; for bronze rings multiply C by E'/210,000. Load capacity same as flat ring in flattened state — use Module A.

Enter tolerance stack and L-ring data from catalogue — results update instantly.

Tolerance Stack
ΣΔ Total stack
mm
Δa Groove tolerance
mm
W-Ring Data (from catalogue)
W-rings have non-linear spring characteristic. Enter the two catalogue points.
W₁ Height at F₁
mm
F₁ Force at W₁
N
W₂ Height at F₂
mm
F₂ Force at W₂
N
W₁ < W₂ (W₁ is more compressed; F₁ > F₂ in most catalogues — check your source).
Assembly Dimensions (optional)
For groove width range. Enter total of all component nominal dimensions at max and min.
Σb_max Parts at max
mm
Σb_min Parts at min
mm
W-rings are convex (bowed) retaining rings with a progressive spring rate. F₁ at W₁ and F₂ at W₂ come from the catalogue. The ring is installed between W₁ and W₂ to guarantee a preload between F₂ and F₁.

Enter tolerance stack and W-ring data from catalogue — results update instantly.

L-ring and W-ring end play compensation calculator — calculates the axial preload and stack compensation for bearing assemblies using wave-form and L-section retaining rings. Developed by AbarTech Ltd, Dyserth, North Wales.

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