John Bracher Posted February 21, 2019 Report Share Posted February 21, 2019 Gents I need to replace some butterfly screws in a CR type TB I am planning to fit. I have removed all the old (mangled) screws, so need to get some replacements. Anyone know what size they are?? Look like about a # 5 or # 6, UNF?? Are any of the usual suppliers good/bad for replacements?? Thanks! Quote Link to post Share on other sites
Waldi Posted February 21, 2019 Report Share Posted February 21, 2019 Hi John, I odered mine from Revington, and also the spindles. I re-used the discs. After alignment of the discs (I checked if the gaps were the same by using the TB as a binocular looking into daylight) I put a dab of Loctite on each by unwinding the screw a bit (one by one) and then tightening again. Waldi Quote Link to post Share on other sites
astontr6 Posted February 22, 2019 Report Share Posted February 22, 2019 13 hours ago, John Bracher said: Gents I need to replace some butterfly screws in a CR type TB I am planning to fit. I have removed all the old (mangled) screws, so need to get some replacements. Anyone know what size they are?? Look like about a # 5 or # 6, UNF?? Are any of the usual suppliers good/bad for replacements?? Thanks! I went down to my local fastener supplier and he found the correct ones by trial and error by going down his bins, on the butterfly stop screws I used socket caps, as this makes adjustment very much easier using an Allen key and vacuum gauge with the engine running to get the balance right. Bruce. Quote Link to post Share on other sites
Nigel Triumph Posted February 22, 2019 Report Share Posted February 22, 2019 On 2/21/2019 at 7:59 PM, Waldi said: Hi John, I odered mine from Revington, and also the spindles. I re-used the discs. After alignment of the discs (I checked if the gaps were the same by using the TB as a binocular looking into daylight) I put a dab of Loctite on each by unwinding the screw a bit (one by one) and then tightening again. Waldi I did as Waldi describes but got the new screws and spindles from Malcolm at Prestige. The binocular tip is spot on, it works. Nigel Quote Link to post Share on other sites
John Bracher Posted February 23, 2019 Author Report Share Posted February 23, 2019 Gents Thanks for the info regarding setting up the TB once the butterflies are secure, all good stuff, but not there yet. I have looked at Revingtons, and see the screws available are priced at something like £3.30 (preumably each??!!)--Will have to ring them So, £39 plus P&P if I want to (while, I am doing it), replace (potentially) all 12! OUCH!! (BTW, Having a trawl around the web, mild steel Cad plated 6/32 UNC screws (as an example) are apparently about £3.50 a packet of 25) Presumably, the 'correct' ones are made form a 'rare earth' metal.......... I work for an manufacturing company, so could probably even buy these screws at 'trade' price, if I can just confirm what size I need! Anything else appreciated! Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.