Retaining Ring & Circlip Groove Calculator (U1/U2)

Free to use, provided as-is. No warranty or guarantee of accuracy or fitness for purpose — always verify groove dimensions against the ring supplier's published data before committing to machining. AbarTech Ltd accepts no liability for outcomes arising from its use.

Retaining Ring Assembly and Groove Verification

Ring Type

Section profile

Location

Ring Dimensions

Enter values from drawing or manufacturer catalogue.

d₁ Nominal ⌀

d₃ Unstressed ⌀

Shaft ring: d₃ < d₁ · Bore ring: d₃ > d₁

b Radial width

s Thickness

Ring Material

Clearance Check (optional)

Enter any bore, shoulder or feature the ring must pass during assembly.

Feature bore ⌀

Over-expansion Check (optional)

If using a mandrel or taper with a sleeve, enter the maximum diameter the ring will reach. Defaults to d₁ + 2b.

Max expansion ⌀

Utility U1 — Assembly verification for a known ring. To design a ring for a given load, use Module A (grooved) or Module E (snap ring). Results update live as you type.

Enter ring dimensions on the left — results update instantly.

Groove Location

Groove is on a

Groove Dimensions

Enter values from drawing or measured dimensions.

d₁ Nominal ⌀

d₂ Groove ⌀

t = —

n Collar length

Distance of material beyond groove on loaded side.

Material & Safety

Shaft / housing material

S Safety factor

—

Wall Thickness Check (optional)

Housing OD (bore rings) or hollow shaft bore ID (shaft rings). Required for w ≥ 3 check.

d₀ Housing OD / bore ID

Groove Checker — U2. Verifies the load capacity of an existing groove. To design a full ring assembly, use Module A.

Enter groove dimensions on the left — results update instantly.

Retaining ring assembly stress and groove load verification calculator — checks assembly bending stress and installation clearance for any ring type (U1), and verifies an existing circlip groove against a chosen ring selection (U2). Seeger assembly check method for snap rings, circlips and DIN retaining rings. AbarTech Ltd, Dyserth, North Wales.