'O' Ring Guide

Housing design
ISO 286-2 Limits and Fits
Extract (See Figures 9 - 11, page 29)
Nom. Diameter Tolerance
up to and
Above including H11 h11
- 3 +0/+0.060 –0/–0.060
3 6 +0/+0.075 –0/–0.075
6 10 +0/+0.090 –0/–0.090
10 18 +0/+0.110 –0/–0.110
18 30 +0/+0.130 –0/–0.130
30 50 +0/+0.160 –0/–0.160
50 80 +0/+0.190 –0/–0.190
80 120 +0/+0.220 –0/–0.220
120 180 +0/+0.250 –0/–0.250
180 250 +0/+0.290 –0/–0.290
continued
Nom. Diameter Tolerance
up to and
Above including H11 h11
250 315 +0/+0.320 –0/–0.320
315 400 +0/+0.360 –0/–0.360
400 500 +0/+0.400 –0/–0.400
500 630 +0/+0.440 –0/–0.440
630 800 +0/+0.500 –0/–0.500
800 1000 +0/+0.560 –0/–0.560
1000 1250 +0/+0.660 –0/–0.660
1250 1600 +0/+0.780 –0/–0.780
1600 2000 +0/+0.920 –0/–0.920
2000 2500 +0/+1.100 –0/–1.100
2500 3150 +0/+1.350 -0/-1.350
All dimensions in millimetres
For ‘O’ rings manufactured by extrusion
Triangular
Groove Sizes
Dovetail
Groove Sizes
Diameter Triangular Diameter Dovetail
Section A Chamfer M Section A Depth X
Metric (mm)
Metric (mm)
3.0 4.48/4.63 3.0 ¥
3.5/3.53 5.10/5.25 3.5/3.53 ¥
4.1 6.00/6.16 4.0 3.48/3.58
5.7 8.18/8.36 4.1 3.59/3.70
8.4 12.18/12.38 4.5 3.88/3.99
Inch
Inch
0.139 .201/.207 0.125 ¥
0.139 ¥
0.188 .159/.164
¥ ’O’ rings not suitable for dovetail
grooves.
Trademark acknowledgements
James Walker acknowledges the following trademarks as mentioned
in this guide. All other names bearing the ® symbol are registered
trademarks of James Walker.
Aflas ®
Dyneon
Kalrez ®
PEEK
Tecnoflon ®
Viton ®
Asahi Glass
3M Dyneon
DuPont Performance Elastomers
Victrex plc
Solvay Solexis
DuPont Performance Elastomers
General information
Health warning: If PTFE or fluoroelastomer (eg, FKM, FFKM, FEPM) products are heated to elevated temperatures, fumes will be produced which may give unpleasant
effects, if inhaled. Whilst some fumes are emitted below 250°C from fluoroelastomers or below 300°C from PTFE, the effect at these temperatures is negligible. Care
should be taken to avoid contaminating tobacco with particles of PTFE or fluoroelastomer, or with PTFE dispersion, which may remain on hands or clothing. Material
Safety Data Sheets (MSDS) are available on request.
Information in this publication and otherwise supplied to users is based on our general experience and is given in good faith, but because of factors which are outside
our knowledge and control and affect the use of products, no warranty is given or is to be implied with respect to such information. Unless governed by type approval
or contract, specifications are subject to change without notice. Statements of operating limits quoted in this publication are not an indication that these values can be
applied simultaneously.
To ensure you are working with the very latest product specifications, please consult the relevant section of the James Walker website: www.jameswalker.biz.
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 31