Saltddirk Posted January 28, 2017 Share Posted January 28, 2017 hi,Yesterday we removed the GB on the Spit in view of a rebuild,When draining the oil into the drainpan we noticed this "needle" I can not say for sure it came out of the gearbox, it might have been on the pan before we started without getting noticed, but chances are slim, I had cleaned the pan with a pressure washer last month and it has not been used since.So what is it? where did it come from? I can not find any ref on the technical drawings Quote Link to comment Share on other sites More sharing options...
Saltddirk Posted January 28, 2017 Author Share Posted January 28, 2017 there are 2 grooves machined into it, terminating in a fork one end and then 2 more, 90 deg out terminating in a fork at the other endat about the middle there seems to be a mechanical impact area, with some markings on the sides and a slightly brighter surface indicating contact, wear? Quote Link to comment Share on other sites More sharing options...
Saltddirk Posted January 28, 2017 Author Share Posted January 28, 2017 one more picture5 mm diameter, appx 28mm lenght.GB is Spitfire Mk2 overdrive box which i bought from Canleys years ago.Dirk Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted January 28, 2017 Share Posted January 28, 2017 Don't recognise that as a gearbox part 🤔. I've not had a D type OD completely to bits so can't say whether it's a part of that or not.Interesting shape though. Not random shrapnel.Nick Quote Link to comment Share on other sites More sharing options...
sprtz Posted January 28, 2017 Share Posted January 28, 2017 Could it be a shell type reamer? never saw one like this though (think) Quote Link to comment Share on other sites More sharing options...
RobPearce Posted January 28, 2017 Share Posted January 28, 2017 I've definitely seen something like that before but I can't for the life of me think where! Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted January 28, 2017 Share Posted January 28, 2017 Quoted from RobPearce I've definitely seen something like that before but I can't for the life of me think where! Pretty much what I've been thinking since I saw the images! It's vaguely reminiscent of an SDS drill shank. Quote Link to comment Share on other sites More sharing options...
esxefi Posted January 29, 2017 Share Posted January 29, 2017 deffo not a reamer it has no cutting edges.from the dimensions you give and it's construction it is surely too fragile to be in a gearbox or o/d unit.you sure it isn't from the pressure washer?they do tend to 'pulse' when operating,it could be a shuttle from the nozzle. Quote Link to comment Share on other sites More sharing options...
Saltddirk Posted January 31, 2017 Author Share Posted January 31, 2017 Interesting thoughts all!Thanks for sharingGlad that it is not from the gearbox, or at least nobody recognizes it as such.I have some more farming equipment maybe it originates from there....If it is important it will manifest itself soon enough.. BRDirk Quote Link to comment Share on other sites More sharing options...
GT6 M Posted January 31, 2017 Share Posted January 31, 2017 https://spitfiremk3.files.wordpress.com/2014/07/wp_20140719_008.jpg !!!!!!M Quote Link to comment Share on other sites More sharing options...
Matt306 Posted January 31, 2017 Share Posted January 31, 2017 Whats that Marcus?Your rebuilt Diff did a sterling job around the RBRR by the way! Quote Link to comment Share on other sites More sharing options...
nang Posted February 1, 2017 Share Posted February 1, 2017 Some horribly worn rollers but what the hell is it from (eek)Tony. Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted February 1, 2017 Share Posted February 1, 2017 It's a sliding joint from a propshaft. This style sometimes used instead of splines as they don't lock under high torque loads. Also used on some driveshafts.It's a good call - does suggest that the mystery part of the centre of a linear bearing assembly. Still not part of gearbox/ODNick Quote Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 1, 2017 Share Posted February 1, 2017 We used a linear race clutch cable which terminated in a similar fasion similar to aircraft control linespete Quote Link to comment Share on other sites More sharing options...
GT6 M Posted February 1, 2017 Share Posted February 1, 2017 As usual, Nicks on the ball, weel done,rest of ye, get some things t,bits,, ha ha haaaaaaaaaaIt aint it, but it had grooves doon itI my self, just cannae think what it is,Sliding jointshttps://www.google.co.uk/searc.....mgrc=CSelAgRwmAkxXM:Ohhh, thanks Matt,M Quote Link to comment Share on other sites More sharing options...
nicmk1est Posted February 1, 2017 Share Posted February 1, 2017 Quoted from Saltddirk one more picture5 mm diameter, appx 28mm lenght.Dirk but he says its 5mm by 28mm,,,unless he`s got MM mixed up with CM Quote Link to comment Share on other sites More sharing options...
RobPearce Posted February 2, 2017 Share Posted February 2, 2017 Quoted from nicmk1est but he says its 5mm by 28mm,,,unless he`s got MM mixed up with CM Well, yes, it's clearly not a propshaft sliding spline, but I don't think Marcus ever suggested it was (and Nick was referring to Marcus's picture, not the mystery object). The propshaft image was a "this is the sort of reason one might machine a part that way". The mystery item looks like it's intended to transmit rotational torque but allow some longitudinal movement (or possibly even a tiny bit of angle). That's why it reminds some people of SDS drill fittings.Still can't think what it's likely to be from. Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted February 2, 2017 Share Posted February 2, 2017 Quoted from RobPearce Well, yes, it's clearly not a propshaft sliding spline, but I don't think Marcus ever suggested it was (and Nick was referring to Marcus's picture, not the mystery object). The propshaft image was a "this is the sort of reason one might machine a part that way". The mystery item looks like it's intended to transmit rotational torque but allow some longitudinal movement (or possibly even a tiny bit of angle). That's why it reminds some people of SDS drill fittings.Still can't think what it's likely to be from. Exactly.....It's winding me up now. Want to know what it is. Character defect apparently!Nick Quote Link to comment Share on other sites More sharing options...
GT6 M Posted February 2, 2017 Share Posted February 2, 2017 Wot ever it is, its got wear rubbins at one endas though this end fitted into some thingyAhaaa, I no wot it is,its a thingy ive never seen befoer, Does that win the comp then !!!M Quote Link to comment Share on other sites More sharing options...
Jonny-Jimbo Posted February 3, 2017 Share Posted February 3, 2017 I've asked around at work and no-one knows. It's a very specifically made part, so whatever it's from doesn't work anymore.Unless when the gearbox was built it was knocking around and someone said 'Hey, lets chuck this in for a laugh. It'll screw them over when it next gets rebuilt.' Quote Link to comment Share on other sites More sharing options...
Saltddirk Posted February 9, 2017 Author Share Posted February 9, 2017 Quoted from Jonny-Jimbo I've asked around at work and no-one knows. It's a very specifically made part, so whatever it's from doesn't work anymore.Unless when the gearbox was built it was knocking around and someone said 'Hey, lets chuck this in for a laugh. It'll screw them over when it next gets rebuilt.' Have been traveling so not really paying attention to the forum,I have been leaning towards the same conclusion Jonny.the other possibly explanation I have is that the drain tray is normally kept close to our "Bobcat" which is used to muck the stables (not my workshop mind you, although it might be the proper tool for the job at times )When I was away last month the thing would not start and the missus had to call in a service engineer to look at it. it might have fallen out of his toolbox.Still since the box was originally bought from Canleys perhaps Dave can shed a light, or if he wants his mistery part back I can post it to him. It is only about one inch long Quote Link to comment Share on other sites More sharing options...
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