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Matt306
February 20, 2017, 9:22pm Report to Moderator

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I took the shaft and input shaft to my bearing supplier to see if they could do anything in metric etc no good. I dicussed the Oilite suggestion you mentioned before Nick and he thought the bush would disentegrate, so would be interested in your solutions life span. I am off to see engineer tomorrow to see if a bush can be used and what would be a good one.


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Triumph 13/60 1970 Convertible  first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE
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Matt306
February 20, 2017, 9:46pm Report to Moderator

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I think my other input shaft has the three hole oil in so may swap them over


Worcestershire Area Organiser search Facebook for Club Triumph Worcester
Triumph 13/60 1970 Convertible  first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE
1974 Spitfire Mk IV in Yellow and Rust... for restoration
Triumph 1000cc 1991 Daytona got to go to pay for Yellow Peril
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Nick Jones
February 20, 2017, 10:12pm Report to Moderator

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Quoted from glang
ok Nick, sounds good (no pun intended). Oilite is certainly easier to get hold of but do you know what ID and OD tolerances have been used?


It was actually a light interference fit on the main shaft tip as the intention is that the movement occurs between it's OD and the inside of the input shaft.  On the OD it's a close sliding fit - possibly a little tighter than I would have chosen but it was what the machinist considered right.  Certainly once assembled the input shaft tip has virtually no detectable sideways play.  We fitted a new pilot bush in the back of the crank too (often overlooked but it's an important part of the system) to give it the best possible chance.

The Oilite part used is AA 707, 3/8"ID x 3/4"OD x 1" long

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012, 10CR2013, 10CR2015, HCR 2016 & HCR 2017.
GT6 Mk3 Roto - project in progress
Spitfire MKIV son's project now on the road as a daily driver
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
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cliftyhanger
February 20, 2017, 10:13pm Report to Moderator

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Quoted from Nick Jones
Interesting digression.  How the hell did he get a 2005 reg on it - did it need SVA?



IIRC then yes. It is an accurate recreation, not sure how that affects registration, or indeed being steam powered. But quite a sight!
The chap is currently restoring a genuine one, reckons it is his pension. Last I heard he was trying to get the woodwork to be accurate to 10 though, which was causing him headaches. Think he may now have realised they were built to 1/4" tolerances.....



Clive Senior

Location-Brighton, East Sussex
Foxy is here, 1500od tax exempt Toledo. Now has the decent engine back in Slant 4 engine bolted in, sprint box and axle.Now has fresh MoT. Needs paint though.
Spitfire Zetec project is started work progressing slooooowly on the road!
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nang
February 21, 2017, 5:05am Report to Moderator

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As a fitter and turner, I learnt many years ago that trying to get wood to the same tolerances as metal is almost impossible.  
Tony.


If all else fails-Read the Instructions! ��Wairoa
New Zealand

1976 2500TC (converted to S spec) owned since 1998.

1999 BMW 2800 cc Z3 Convertible.
 
2003 BMW 525i Touring.
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Matt306
February 21, 2017, 5:56pm Report to Moderator

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Been to a couple of engineering shops one suggested buying new shaft. Another was to use a specialist welder then get the shaft ground back to half inch. Problem being the tip is not only tough but oval.


Worcestershire Area Organiser search Facebook for Club Triumph Worcester
Triumph 13/60 1970 Convertible  first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE
1974 Spitfire Mk IV in Yellow and Rust... for restoration
Triumph 1000cc 1991 Daytona got to go to pay for Yellow Peril
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glang
February 21, 2017, 8:38pm Report to Moderator

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Matt I think there is another possibility using one of these:

http://www.ebay.co.uk/itm/IR-N.....5NVG7MI3vL1Tda_UHJRw

It would need to be carefully fitted to the tip after machining and then the input shaft may also need work to fit either another larger needle bearing or bush....
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Pete Lewis
February 21, 2017, 8:52pm Report to Moderator

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Before i went to the 18mm tip  I rescued a worn input shaft with a sleeved/cadged needle roller
but this blocked the oil drillings , it lasted two seasons and failed

pete


1964 1600 Vitesse 6 Cactus and Black , now  sold
now have T2000   Mk2 saloon in French Blue/grey trim  been  restored without running since 1997
now has power steering ,poly bushed and Alfa 156 seats
location  Luton
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glang
February 21, 2017, 9:28pm Report to Moderator

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Ahhh ok sounds like a very light skim of the tip and then using an oillite bush is the way to go. That would also have the advantage of being completely flexible on size so that if the input shaft original bearing surface is good enough you might get away without having to machine that....
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Matt306
February 22, 2017, 4:08pm Report to Moderator

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The machine shop didn't recommend oiled bushes either as they can't take the load


Worcestershire Area Organiser search Facebook for Club Triumph Worcester
Triumph 13/60 1970 Convertible  first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE
1974 Spitfire Mk IV in Yellow and Rust... for restoration
Triumph 1000cc 1991 Daytona got to go to pay for Yellow Peril
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glang
February 22, 2017, 4:41pm Report to Moderator

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Well the exact load produced is difficult to know and the shop has got to be conservative - dont forget that like most cars on here it probably wont do more than 2000 miles a year so if the bush lasts 20000 miles thats 10 years motoring!
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Nick Jones
February 22, 2017, 8:15pm Report to Moderator

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Quoted from Matt306
The machine shop didn't recommend oiled bushes either as they can't take the load


This remains to be seen......

I don't think the load or rubbing speeds are all that high by bearing standards.  What kills the standard rollers is dodgy lubrication (it tends to get centrifuged out and rollers need lots of lube) and running out of line so the loads get concentrated on the ends of the rollers.

If oilite is considered too feeble then a solid phosphor bronze bush, which is a stronger material, could be used in the same way.  It would need an oil scroll though I reckon.

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012, 10CR2013, 10CR2015, HCR 2016 & HCR 2017.
GT6 Mk3 Roto - project in progress
Spitfire MKIV son's project now on the road as a daily driver
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
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