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O-Ring Calculator for Piston Seals

This document contains an O-ring calculator that allows a user to input dimensions for a piston seal and calculates compression, housing fill, stretch, groove depth, lead-in chamfer, and gap values. It provides nominal, maximum, minimum, and test result values. The calculator is based on standards DIN ISO 3601-2 for O-ring dimensions and tolerances. It calculates results for both concentric and eccentric piston positions.

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Matyas Takacs
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277 views1 page

O-Ring Calculator for Piston Seals

This document contains an O-ring calculator that allows a user to input dimensions for a piston seal and calculates compression, housing fill, stretch, groove depth, lead-in chamfer, and gap values. It provides nominal, maximum, minimum, and test result values. The calculator is based on standards DIN ISO 3601-2 for O-ring dimensions and tolerances. It calculates results for both concentric and eccentric piston positions.

Uploaded by

Matyas Takacs
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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11/16/22, 9:21 PM O-ring calculator

Piston Seal
Input values

Nominal Size Standard/Fit Upper


Lower
Max.
Min.

Tolerance
Tolerance
Dimensions Dimensions
Limit Limit
Piston-Ø d9 [mm] 16.000 f7 -0.016 -0.034 15.984 15.966
Bore-Ø d4 [mm] 16.000 H7 0.018 0.000 16.018 16.000
Groove-Ø d3 [mm] 13.800 f7 -0.016 -0.034 13.784 13.766
Groove Width b [mm] 2.000 recommanded 0.250 0.000 2.250 2.000
Groove Radius r1 [mm] 0.200 recommanded 0.100 -0.100 0.300 0.100
OR Inside-Ø d1 [mm] 13.000 DIN ISO 3601 0.213 -0.213 13.213 12.787
OR Cross-Section-Ø d2 [mm] 1.500 DIN ISO 3601 0.080 -0.080 1.580 1.420

Material Group NBR Application: static


Pressure P [bar] 6.000
Temperature T [°C] 23 ok
Thermal Expension Coefficient α [10^-6/K] 175
Material Hardness [shore A] 70

Calculation results concentric Calculation results eccentric

nominal max. min. test result max. min. test result


Compression incl. R [%] 24.470 27.773 16.648 ok Compression incl. R [%] 28.750 14.057 ok
Compression incl. R [mm] 0.356 0.426 0.225 Compression incl. R [mm] 0.441 0.190
Housing Fill [%] 76.316 84.885 56.669 ok Gap g [mm] 0.052 0.016 ok
OR Stretch [%] 6.154 7.796 4.186 Stretch > 6,5%
Groove Depth t 1.100 1.126 1.108
Lead-in Chamfer 15° z [mm] 1.762
Lead-in Chamfer 20° z [mm] 1.359 Legend
Gap g [mm] 0.000 0.026 0.008 ok
max. allowed gap g [mm] 0.080 ok R = Reduction in cross section

OR = O-Ring

Calculation basis after DIN ISO 3601-2

https://www.cog.de/en/products/all-about-o-rings/o-ring-calculator 1/1

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