Piston rings

Piston rings

This topic has 3 replies, 2 voices, and was last updated 18 September 2021 at 20:46 by wendy jackson.

Viewing 4 posts - 1 through 4 (of 4 total)

Author

Posts
18 September 2021 at 14:26 #563335
wendy jackson
Participant
@wendyjackson
Today I took out the pistons of my B1. there as been a bit of steam bypass when running. Looking at the drawings the measurements of the cylinder and the piston are ok. But there is only one piston ring and not two as per the drawing. This piston ring is of the rubber o ring type. So my question is. Is one piston ring enough or should I machine a second the piston to take a second ring. And the second question is a rubber o ring ok, or would a cast iron ring abet a single one be better. If a iron ring is better. What size should I machine to. And what cap size in the ring and how wide should it be. Thanks.
Advert

18 September 2021 at 14:26 #2063
wendy jackson
Participant
@wendyjackson
18 September 2021 at 16:29 #563345
HOWARDT
Participant
@howardt
Assuming you cylinder is bronze and not cast iron then a single o ring should be ok. Just select the correct material for the o ring, not standard epdm. Surface finish should be honed to a fine smooth finish. Only a single o ring should be fitted in order for the ring to be adequately lubricated in both directions of travel.

If the cylinder is cast iron then iron rings should be fitted, the reason being surface finish and rusting will cause early failure of a rubber ring. Yes rubber seals are used in brake cylinders etc of cast iron but they are in the presence of lubricants only. A very good YouTube video has just been put up by MrCrispin on cylinder rings, well worth a watch. I am sure some will have a lot to say on the subject, but that is my take.
18 September 2021 at 20:46 #563367
wendy jackson
Participant
@wendyjackson
Thanks. Good information.
Author

Posts

Viewing 4 posts - 1 through 4 (of 4 total)

Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

Code of Conduct

Latest Replies

Viewing 25 topics - 1 through 25 (of 25 total)

- Topic
- Voices
- Posts
- Last Post
- boring for crankshaft
  Started by: bricky in: Help and Assistance! (Offered or Wanted)
- 3
- 3
- 4 March 2025 at 06:56
  JasonB
- Turning Question: Fine Chatter / Wave Pattern 1 2
  Started by: Nigel Graham 2 in: General Questions
- 13
- 30
- 4 March 2025 at 05:20
  Simon Collier
- Continuing the Television theme …
  Started by: Michael Gilligan in: Electronics in the Workshop
- 8
- 14
- 4 March 2025 at 01:08
  Nicholas Farr
- Case hardening
  Started by: Garry Coles in: General Questions
- 7
- 10
- 3 March 2025 at 21:41
  Fulmen
- What’s this for…no.8?
  Started by: beeza650 in: Beginners questions
- 9
- 16
- 3 March 2025 at 21:38
  Georgineer
- A” WEAVER “1CC DIESEL ENGINE 1 2
  Started by: KEITH BEAUMONT in: I/C Engines
- 8
- 29
- 3 March 2025 at 21:24
  jimbo7636
- Warco WM18B CNC conversion
  Started by: Tomek in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 10
- 18
- 3 March 2025 at 20:56
  Tomek
- Use of a weighted cord for bullwheel indexing.
  Started by: Greensands in: Workshop Techniques
- 8
- 10
- 3 March 2025 at 20:51
  John Purdy
- Drilling on VMC Mill
  Started by: Vic in: Manual machine tools
- 5
- 5
- 3 March 2025 at 20:41
  old mart
- Lead-sheathed wiring – why? 1 2
  Started by: gerry madden in: Materials
- 24
- 28
- 3 March 2025 at 20:36
  old mart
- Bending Rolls
  Started by: Baldric in: Workshop Tools and Tooling
- 14
- 23
- 3 March 2025 at 20:23
  Julie Ann
- 3/16” BSF mill gib screws 1 2
  Started by: Graham Horne 2 in: General Questions
- 14
- 32
- 3 March 2025 at 20:13
  old mart
- Another lidl picture fail
  Started by: Ian Parkin in: The Tea Room
- 4
- 5
- 3 March 2025 at 19:25
  V8Eng
- Taig lathe DC motor 1 2
  Started by: Peter Cook 6 in: Work In Progress and completed items
- 10
- 26
- 3 March 2025 at 19:15
  John Haine
- Dr Schlesinger
  Started by: ryan.carter848 in: Books
- 4
- 5
- 3 March 2025 at 11:58
  Phil P
- Windows 11 Upgrade – non compliant machines.
  Started by: Peter Cook 6 in: The Tea Room
- 6
- 7
- 3 March 2025 at 10:01
  Howi
- Pivot hole bushing
  Started by: Plasma in: Clocks and Scientific Instruments
- 7
- 12
- 3 March 2025 at 09:13
  Circlip
- Slow Again? 1 2
  Started by: JasonB in: Website Questions, Comments, and Suggestions
- 23
- 50
- 3 March 2025 at 08:17
  SillyOldDuffer
- Always be careful
  Started by: Blue Heeler in: The Tea Room
- 2
- 2
- 3 March 2025 at 08:06
  Nealeb
- Strange German Lighter
  Started by: Vic in: The Tea Room
- 12
- 20
- 2 March 2025 at 21:21
  Fulmen
- Material to make studs – EN1A??
  Started by: flatline in: Materials
- 14
- 16
- 2 March 2025 at 19:24
  flatline
- Kelsey Media buys Mortons titles
  Started by: Colin Bishop in: Website Questions, Comments, and Suggestions
- 9
- 20
- 2 March 2025 at 19:19
  Colin Bishop
- Whistling TV
  Started by: Speedy Builder5 in: Electronics in the Workshop
- 5
- 7
- 2 March 2025 at 16:54
  Speedy Builder5
- NEW LOOK – Model Engineer & Workshop 1 2 … 6 7
  Started by: sohara in: Model Engineer & Workshop
- 54
- 172
- 2 March 2025 at 15:18
  JasonB
- What’s this for…no.7?
  Started by: beeza650 in: Beginners questions
- 5
- 8
- 2 March 2025 at 15:17
  beeza650

Viewing 25 topics - 1 through 25 (of 25 total)

View full reply list.

Latest Issue

March 2025

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies