O-rings


RED AND WHITE SILICONE RUBBER 0-RINGS FOR STEAM ENGINES.

Arnold Throp first described the use and fitting of 0-rings in the Model Engineers of 1st. September & 1st. October 1964, they have now become universally used amongst model engineers for the sealing of pistons, piston rod glands, water gauges, pumps and clacks. They can also be used for static face sealing. They will withstand all the temperatures encountered in small locomotives fitted with superheaters, including ones fitted with the radiant type.

Working temperature  -55 deg C to +230 deg C

We stock rings from 1/16 in. inside dia. to 2 ¼ in. outside dia.

A = groove diameter. B= groove width. C=groove depth from piston wall.

.070″ Cross Section

British Standard Number

Inside Diameter

Outside Diameter

A

B

C

Price each

003

1/16

3/16

.190

5/64 .066 34p
004 5/64 13/64 .212 5/64 .066 33p
005 3/32 7/32 .227 5/64 .066 33p
006 1/8 1/4 .259 3/32 .066 32p
007 5/32 9/32 .290 3/32 .066 32p
008 3/16 5/16 .321 3/32 .066 32p
009 7/32 11/32 .352 3/32 .066 32p
010 1/4 3/8 .384 3/32 .066 32p
011 5/16 7/16 .446 3/32 .066 33p
012 3/8 1/2 .509 3/32 .066 34p
013 7/16 9/16 .571 3/32 .066 35p

 

.103″ Cross Section
British Standard Number Outside Diameter Inside Diameter B C Price each
111 5/8 7/16 1/8 .100 38p
112 11/16 1/2 1/8 .100 40p
113 3/4 9/16 1/8 .100 46p
114 13/16 5/8 1/8 .100 50p
115 7/8 11/16 1/8 .100 56p
116 15/16 3/4 1/8 .100 60p
117 1″ 13/16 1/8 .100 62p
.139″ Cross Section
British Standard Number Outside Diameter B C Price each
211 1 1/16 5/32 .135 62p
212 1 1/8 5/32 .135 62p
213 1 3/16 5/32 .135 64p
214 1 1/4 5/32 .135 68p
215 1 5/16 5/32 .135 70p
216 1 3/8 5/32 .135 74p
217 1 7/16 5/32 .135 76p
218 1 1/2 5/32 .135 78p
219 1 9/16 5/32 .135 82p
220 1 5/8 5/32 .135 84p
221 1 11/16 5/32 .135 86p
222 1 3/4 5/32 .135 88p
223 1 7/8 5/32 .135 92p
224 2″ 5/32 .135 94p
226 2 1/4 5/32 .135 £1
Notes:-

Please send a Stamped addressed envelope (stamp for 60gms) for return of rings.

NO VAT to be added.  Cheques payable to “Southworth Engines”.  Sorry no credit cards.