O-Ring Gland Calculator

Inputs

View results
Inside diameter of the free O-ring before installation.
mm
O-ring cord diameter.
mm
Diameter the O-ring stretches over in the gland.
mm
Radial gland depth after installation; this sets squeeze.
mm
Axial groove width available to the O-ring.
mm

Results

Default result
Edit inputs
Squeeze(S)
20%
Pass

Squeeze = (cross section - gland depth) / cross section.

Typical static radial target is roughly 10-30%.

Also computed

Gland fill(GF)61.36%

Gland fill = O-ring cross-section area / gland rectangular area.

Many static glands target below about 85% fill.

Stretch(ST)2%

Keep stretch modest; large stretch reduces cross section.

O-ring area(A_o)3.142mm²

Gland area(A_g)5.12mm²

Compressed height(h)1.6mm

Method notes 3 notes
  • This is a geometric gland check for squeeze, stretch and fill. It does not replace the Parker/AS568 or manufacturer gland tables.
  • High gland fill leaves little room for thermal expansion, swell and tolerance stack-up; fill above about 85% is usually a warning for static glands.
  • Dynamic seals, pressure direction, extrusion gaps, backup rings, compound swell, temperature, surface finish and friction are not included.

Powered by MachineCalcs ↗