Derek Williams Posted November 15, 2023 Share Posted November 15, 2023 Hi, Im trying to restore an OS FS 48 that wasn’t performing as good as it used to. I discovered that the piston ring had jammed in its groove and proved impossible to get out without breaking it. so I need to replace it and was horrified at the cost of an OS ring and remembered reading on this site about someone that manufactured rings. can you help me with any contact information or maybe you have a ring knocking around? Any help would be greatly appreciated Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted November 15, 2023 Share Posted November 15, 2023 Yes look on ebay . A seller named Gaviscool sells piston rings for many discontinued engines. They are excellent quality and very well priced . An OS 48 will cost around £12 the last time i was on his site. Ill have a look and pm you later. 1 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted November 15, 2023 Share Posted November 15, 2023 I have just tried to look up the site I recommended in my last post and its appears closed !!!😧. I have messaged the seller to see if they will be continuing to supply parts . I used his products on a few occasions as it was far quicker and easier to buy a piston ring from him than it is to make them . If he has packed up it looks like ill have to fire up the lathe more often !! Quote Link to comment Share on other sites More sharing options...
Derek Williams Posted November 15, 2023 Author Share Posted November 15, 2023 Thanks for replying so swiftly. Quote Link to comment Share on other sites More sharing options...
Derek Williams Posted November 15, 2023 Author Share Posted November 15, 2023 Thanks for replying so swiftly. I’ve looked online for Gaviscool and can’t find anything current Quote Link to comment Share on other sites More sharing options...
Andy Stephenson Posted November 15, 2023 Share Posted November 15, 2023 Are piston rings still made from cast iron or is there a more modern material used these days. Quote Link to comment Share on other sites More sharing options...
John Rickett 102 Posted November 15, 2023 Share Posted November 15, 2023 Try GCPistonrings.com, its the same chap - Gavin Carter 2 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 15, 2023 Share Posted November 15, 2023 He is on fb,,, https://www.facebook.com/groups/3214227645472741/user/100000894955785/ Quote Link to comment Share on other sites More sharing options...
Derek Williams Posted November 15, 2023 Author Share Posted November 15, 2023 Hi John, Paul, thank you so much. I’ve messaged him on his site. Del Quote Link to comment Share on other sites More sharing options...
Derek Williams Posted November 16, 2023 Author Share Posted November 16, 2023 Hi, just to let everyone know that I’ve ordered my piston ring £12 Just proves what a brilliant group this is. Thank you 2 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted November 16, 2023 Share Posted November 16, 2023 Thank for putting GC piston ring web address up. For one dreadful minute I thought that we had lost a trusted member of our ever decreasing spares suppliers. I have made many piston rings over the years but to be honest G C rings are so good and at his prices its not worth the hassle of making them . Glad you got sorted Derek. 3 Quote Link to comment Share on other sites More sharing options...
Gavin CARTER Posted November 23, 2023 Share Posted November 23, 2023 GC Piston Rings - Custom Piston Rings, Model Engines & Steam Engines 3 Quote Link to comment Share on other sites More sharing options...
EMIW Posted March 23 Share Posted March 23 Thank you for posting this up. I am a returning modeller after many years - I have two Webra Speed 61 engines to re-commission. Hopefully, the lay up was good, but piston rings are on the list as well as main journal races (hopefully these are industry standard bearings). Malcolm Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted March 23 Share Posted March 23 A good source for bearings is "Simply Bearings" . Excellent service , prices and postage included . 2 Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 23 Share Posted March 23 I don't know much about the Webras but a couple of makers have used non-standard bearings in the past (at least one was a mixed Imperial/metric specification). Advice from Irvine was to source a bearing with the correct outside diameter and thickness and a larger bore - then make a sleeve to adapt it. Quote Link to comment Share on other sites More sharing options...
J D 8 Posted March 23 Share Posted March 23 Engineering wise the above Irvine advice sounds like a bad idea. Simply bearings have a wide range. All you need is a good vernier caliper [£25ish]to size what you need. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 23 Share Posted March 23 This was for unobtainable sizes John - sorry, I should have made that clearer. 1 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted March 23 Share Posted March 23 I go onto boca bearings to get the sizes, then get them wherever you can, https://www.bocabearings.com/parts/Webra Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted March 23 Share Posted March 23 3 hours ago, Martin Harris - Moderator said: I don't know much about the Webras but a couple of makers have used non-standard bearings in the past (at least one was a mixed Imperial/metric specification). Advice from Irvine was to source a bearing with the correct outside diameter and thickness and a larger bore - then make a sleeve to adapt it. Why do that when a proper bearing is available . Many use imperial front and metric rear. bearing . Just measure and order from or speak to Simply Bearings , Only a few engines use "Special manufacturer only sizes" Ive only come across this once on a OS 120 Gemini twin . If Simply Bearings cant get your bearing size then you have an issue . 1 Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 23 Share Posted March 23 I’m not sure what’s given the impression that I’ve recommended adapting anything other than an unobtainable bearing. I thought I’d clarified that in my reply to JD8! 1 Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 23 Share Posted March 23 Got my bearings from model fixings,be aware the early speed 61 had a 15mm crankshaft and later versions 17mm Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 23 Share Posted March 23 A good reason to measure rather than rely on listings. 1 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted March 23 Share Posted March 23 1 hour ago, Martin Harris - Moderator said: I’m not sure what’s given the impression that I’ve recommended adapting anything other than an unobtainable bearing. I thought I’d clarified that in my reply to JD8! Sorry Martin missed that . 1 Quote Link to comment Share on other sites More sharing options...
Manish Chandrayan Posted March 24 Share Posted March 24 Most good bearings have the sizes mentioned on them. Look for the same nomenclature when procuring new ones and size issue is resolved Quote Link to comment Share on other sites More sharing options...
EMIW Posted March 26 Share Posted March 26 On 23/03/2024 at 10:02, Engine Doctor said: A good source for bearings is "Simply Bearings" . Excellent service , prices and postage included . Yes, thank you, Engine Doctor. I was planning to get the measurements off the existing and approach SImply Bearings - I’ve had good service from them in the past for automotive bearings👍 Quote Link to comment Share on other sites More sharing options...
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