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Need to ream dizzy casing to 18.5mm
DaveFJ - 16/1/07 at 12:07 PM

I have been tackling the problem of how to remove the dizzy on a pinto using MSnS...

I have cut down the shaft and the casing so a 1" stub protrudes. I have removed the bearing from the top of the casin and want to insert it into the top of the stub to accurately locate the top of the shortened shaft.

consequently I need to enlarge the bore for top 15mm or so of the ally casing to 18.5mm...

had thought of reaming it out but can't find a suitable source of toos and I'm not sure it will retain the alignment well enough...

I have no access to a lathe

any thoughts?

Schrodinger - 16/1/07 at 12:18 PM

quote:
Originally posted by DaveFJ

had thought of reaming it out but can't find a suitable source of toos and I'm not sure it will retain the alignment well enough...

I have no access to a lathe

any thoughts?


I see you are in Ipswich, when I worked there until a few months ago I used a tool place, whose name escapes me, but it was at the end of the Farthing Road opposite the sugar beet factory, they sell all sorts of tools at reasonable prices.

02GF74 - 16/1/07 at 01:53 PM

can you get an 18.5 mm drill?

drill the timing cover to bigger thaqn 18.5 mm and then drill a hole in a steel plate that you can fit on top, assuming you can drill and tap 2 screws into the cover - having slots in the cover will make it adjustable so you don;t need to be accurate with the timing cover.

DaveFJ - 16/1/07 at 01:59 PM

the problem with large drills is that the holes they leave tend to be somewhat less that circular....... But yes I have thought about it and can't find any with a wasted shank small enough to go in my drill press - or short/cheap enough for that matter!

I think my best bet is to get access to a lathe.....

cheers

[Edited on 16/1/07 by DaveFJ]

NS Dev - 16/1/07 at 04:38 PM

yep, either bore it out in a lathe, or forget the bearing, get a piece of phosphor bronze, drill it to suit the dizzy shaft and get the OD turned to suit the dizzy.

David Jenkins - 16/1/07 at 05:01 PM

Dave,

You will shortly have a U2U!

David

DaveFJ - 25/1/07 at 01:43 PM

Now sorted thanks to Dave Jenkins...

for those interested i will post some pics of the finished item once it is finished

DarrenW - 25/1/07 at 09:50 PM

Drill out to 19mm and ematal the bearing in.