Sigma RWD conversion

[Guest PumaPower]

I'm currently swapping out my mighty xflow in favour of a 1.7 Z-SE, but keeping the trusty rocket box, although my problem would be the same if I was changing to a type 9.

I have an issue with the size of the input shaft and the spigot bearing hole in the crank. 

RWD Motorsport do a bearing that will fit, but that requires the input shaft being ground down to 10mm and I'm struggling with getting that done locally.

Anyone here had this issue and found a solution?

 

[theduck]

I can't recommend any company form experience, but a quick search on google and I would say start with these guys - http://www.specialisedengines.co.uk/ - if they cant do it, I would say it is likely they could recommend someone who can.

EDIT:  See Bob Tuckers post below - Seems this company is best avoided!

Edited November 28, 2018 by theduck

[brumster]

Assuming you're happy to remove the input shaft yourself, it should be fairly easy to find an engineering firm who would turn down the input shaft end for you... a fairly routine job for anyone with a suitable lathe/workholding (assuming the input shaft isn't anything too weird and wonderful). I can think of loads in the Midlands area, plus one in Derbyshire, that I am on talking terms with but you really want someone local you can just pop in to. I would start looking on google maps/business directories for engineering firms local to you - target the typical light-industrial business parks of which I'm sure you have loads. With a bit of ringing-around and some friendly visits-in-person by yourself, I suspect you'll find some machine shop that'll do it out-of-hours for you, for £20 in the hand of the operator who does it

A lot of kit building and jobs like this rely on you building up a reparté with small businesses. Never underestimate the power of walking into a place unannounced and having a polite, friendly chat with the guy on the front desk. "Alright mate? Listen, I dunno whether you can help me with this little problem, I'm trying to find somewhere that would do..."

...and away you go ;). Rememeber the phrase "No I don't need a VAT receipt"

 

[richyb66]

Ditch the needle roller bearing and use a plain olilite bearing. I think you need 17mm O/D and 1/2" I/D so it should be easy enough to buy one of these and get the centre bored out and the O/D turned down to size.

 

https://www.bearingboys.co.uk/?catid=1158&display=&orderby=&att1=12mm&att2=18mm&att3=

[Bob Tucker]

From personal experience

DONT GO ANYWHERE NEAR SPECIALISED ENGINES

Also check Dave Andrews site for another unbiased opinion.

& Google "specialised engines reviews"

If you dont mind a trip to "the Dark Side!" I can thoroughly recommend Dartford Rebore.....small family run business.

http://www.dartfordreboreenginecentre.co.uk/

Edited November 28, 2018 by Bob Tucker

[theduck]

Edited my comment to say avoid them!