american ring true manufacturing solutions

STW-120 Retaining Ring Spec Sheet

Part Number: STW-120

STW - External JIS B 2804 Retaining Rings

View as a PDF


Display Units: inches |  metric
Ring Specs

(D) Free Diameter: 4.449 +0.022 / -0.022 in.
(t) Thickness: 0.157 +0.004 / -0.004 in.
(b) Radial Wall:
Groove Specs:

(B) Application Diameter: 4.724 in.
(G) Groove Diameter: 4.567 +0.000 / -0.021 in.
(W) Groove Width: 0.165 +0.007 / -0.000 in.
Groove Depth: 0.079 in.
Other Specs

Approximate Weight per 1000:
(Pg) Theoretical Thrust Load Capacity - Groove Yield:
Notes: Yield Strength of Groove Material (Ys): 45,000 psi. Calculated using a safety factor (K) of 2

Equation:
Pg = [ Cf * B * d * Ys * pi ] / K
    = [ (1.2) * (4.724 in.) * (0.079 in.) * (45,000 psi) * 3.14 ] / 2
31,639lbs.
(Pr) Theoretical Thrust Load Capacity - Ring Shear:
Notes: Ring Material1: Carbon Spring Steel (SAE 1060-1090). Shear Strength of Ring Material (Ss): 150,000 psi. Calculated using a safety factor (K) of 4

Equation:
Pr = [ Cf * B * t * Ss * pi ] / K
    = [ (1.2) * (4.724 in.) * (0.157 in.) * (150,000 psi) * 3.14 ] / 4

1Calculation assumes Carbon Steel for ring material, but Carbon Steel not necessarily available for all parts or sizes.
104,797lbs.