Primary chaincase disaster

pictures (or stories) of hideous injuries sustained by your ariel
User avatar
paul.jameson
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 2934
Joined: Wed Oct 12, 2011 3:04 pm
Location: Herefordshire
Contact:

Re: Primary chaincase disaster

Post by paul.jameson »

You have a good point on the re-manufacture. Although the numbers of 1936-38 singles primary case outer sales may be low, the extremely similarly shaped Square Four primary case outer is also in short supply and probably rather more demand. The singles outer is of course rather longer than the Square Four version but the two cases were obviously designed to be as alike as was possible.
Paul Jameson
35 LG (project), 37 RH500, 52 ex ISDT KHA, 54 KH(A), 75 Healey 1000/4.
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist (but not Machine Registrar), Gauges and Clocks Spares Organiser.
roland robinson
Posts: 56
Joined: Tue Mar 29, 2011 12:37 am
Location: Warwickshire
Contact:

Re: Primary chaincase disaster

Post by roland robinson »

Paul,
A pattern is already in existence for the square four primary outer case.
Roland.
Dave.Barkshire
Holder of a Silver Anorak
Holder of a Silver Anorak
Posts: 866
Joined: Thu Feb 24, 2011 3:33 pm
Location: Exmoor UK & Lamma Island HK
Contact:

Re: Primary chaincase disaster

Post by Dave.Barkshire »

I did email Roger Gwynn and he sent me the following reply...
Niether Draganfly not the club have any plans to get these made at the moment but it is something that perhaps we should be looking at. nPattern making can now be done for about £500 by laser scanning and 3d printing. The casting is not expensive, perhaps £30 but machining is still not cheap, perhaps £70 - £100 each, based on a qty of 10. Higher quantity of course = reduced costs. Primary cases for Slopers have been made in recent years by at least 4 parties, so we ought to be able to make some of the more common ones. Presumably the inners are required as well. Doug Walker has made a pattern and a prototype casting for the 1937-58 SQ4 case but I don’t have any costings for that. Really it needs someone desperate enough to pick up the ball and run with it…..
I seem to remember that there was a list of candidate re-manufacture projects in the club, does anyone know who keeps this list?
volker.halbach
Holder of a Nylon Anorak
Holder of a Nylon Anorak
Posts: 155
Joined: Sun Jul 08, 2018 8:57 pm
Location: Oxfordshire, UK
Contact:

Re: Primary chaincase disaster

Post by volker.halbach »

Count me in. I have been looking for an outer cover without any success and found only later covers.
User avatar
brenton.roy
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 2056
Joined: Sun Feb 27, 2011 1:13 pm
Location: Adelaide, South Australia
Contact:

Re: Primary chaincase disaster

Post by brenton.roy »

Me too. I could do with 2 sets.
'51,'56 Squares, '48 VH, '27 Model C, R67/2, Mk IV Le Mans, '06 Super Duke and Ariel projects.
ian.scott
Holder of a Silver Anorak
Holder of a Silver Anorak
Posts: 674
Joined: Sat Jan 07, 2012 9:22 pm
Location: Oxfordshire
Contact:

Re: Primary chaincase disaster

Post by ian.scott »

There seem to be quite a few on eBay of various types and conditions. They do tend to be expensive though.

Ian
Last edited by ian.scott on Mon May 27, 2019 3:10 pm, edited 1 time in total.
john.whiting
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 1837
Joined: Sun May 22, 2011 2:10 pm
Location: Brisbane QLD
Contact:

Re: Primary chaincase disaster

Post by john.whiting »

if a pattern is to cost 500 quid,then I would have a case CNC machined from a solid lump of ally.....the upside being the holes would come as part of the job.....of course ,you would have to glue the old one back together,so it could be digitized..........its probably easier to take good care for your primary drive......I dont like belts,but there is no way a belt is gonna bust your primary
Mick D
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 575
Joined: Tue Nov 27, 2018 2:49 pm
Contact:

Re: Primary chaincase disaster

Post by Mick D »

john.whiting wrote: there is no way a belt is gonna bust your primary
In my opinion, if a belt, or any other form of drive, carries debris larger than the chain case can accommodate it will break the chain case - a better approach in this case would be to prevent the screw from being able to fall out, an extended head would achieve this.

Regards Mick
jj.palmer
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 405
Joined: Tue Oct 15, 2013 3:07 pm
Location: Denby Village, Derbyshire.
Contact:

Re: Primary chaincase disaster

Post by jj.palmer »

To lock the subject screw in place I drilled 2 small holes in the casing adjacent to the screw and wired it through the screw slot, see attached.

John P.
Attachments
005.JPG
jj.palmer
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 405
Joined: Tue Oct 15, 2013 3:07 pm
Location: Denby Village, Derbyshire.
Contact:

Re: Primary chaincase disaster

Post by jj.palmer »

A better view, also a lock washer on the cush drive nuts.

John P.
002.JPG
Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests