Page 1 of 1

Top rockers

Posted: Tue Nov 13, 2012 2:01 pm
by stylussprinter
Matt has furnished me with a spherical bearing and cup holder (1/2 inch bore) to develop lightweight CDS tube top rockers . He's been looking at mine but isn't keen on the outer rodend -- hence the spherical bearing :lol:
It's quite a way off to actually make them but the idea is milling around in my head already so a jig will be the next move ---- just a bit too lazy to take mine out of the Stylus :lol: Some careful measuring and angle checking is on the cards :)
The spec will be an inner central bearing CDS tube to take needle roller bearings , allowing the '' old mini '' trailing link spindle . Drilled and tapped underneath centrally to take a grease nipple. Outer pivot to be a spherical bearing to take a straight pin , threaded . NOT a tapered pin as original. Inner pivot to be parallel 2mm plates drilled 1/2 inch to take shocks(OPEN not capped as originals).
Then both inner and outer arms to be 25mm CDS tube 1.6mm gauge plus probably a central single tube stretching from outer to inner pivot points.

When I get as far as having made the jig then making up the first rocker --- I'll put a photo up here ------ any takers after Matt gets to test them :roll:

Re: Top rockers

Posted: Thu Dec 27, 2012 3:01 pm
by MattD
And this is the mod required to use Escort uprights with a rod-end top rocker, as expected its been done before :wink:

Was hoping to buy them off the shelf, but can't find any in Mini circles - anybody know somebody :?:

This is the mod to the part similar to that we use (the Mini guys use the earlier type which can be disassembled, Stylus's have later Metro/MGF parts which are sealed units)
Under the ground off ball end a top hat is fitted to lock the pin upright. The upper taper is 7degrees, turned down parallel to suit the 1/2" rod-end.
pin1.jpg
On a Terrapin single-seater, Rob Macknay (to credit, where credit is due), has made one-off pins to do the job.
a643886-Mini Metro Upright.jpg
Not quite what I want, so I'll end up drawing my own I expect.

Re: Top rockers

Posted: Thu Dec 27, 2012 3:56 pm
by stylussprinter
The original SSC solution that we all had , unless changed as I did ie. METRO/MGF piece ---- ' could ' have the rubber boot removed then quite simply welded solid , after turning it down to a parallel pin :idea:

Re: Top rockers

Posted: Thu Dec 27, 2012 3:59 pm
by MattD
stylussprinter wrote:The original SSC solution that we all had , unless changed as I did ie. METRO/MGF piece ---- ' could ' have the rubber boot removed then quite simply welded solid , after turning it down to a parallel pin :idea:
Yep, was thinking that. Welding it all straight to hold it in the lathe chuck & turn it down might be difficult though :?: :roll:

Re: Top rockers

Posted: Thu Dec 27, 2012 4:21 pm
by stylussprinter
Alternatively then ------- cut the ball/swivel from it's hex screw fitting , weld a piece of circular 1/8th plate to the hex screw , drill the centre to 1/2 ins ---- add a NAS bolt , job done :idea:

Re: Top rockers

Posted: Thu Dec 27, 2012 5:36 pm
by MattD
stylussprinter wrote:Alternatively then ------- cut the ball/swivel from it's hex screw fitting , weld a piece of circular 1/8th plate to the hex screw , drill the centre to 1/2 ins ---- add a NAS bolt , job done :idea:
Yes, good idea. Think I'd be going thicker than 1/8th though :wink:
But certainly quick, & cheaper than buying an M30 or M33 die too.....
Stylus_Rocker_Pin.jpg