[TR] TR] Rocker Shaft locating screw

[Roger Elliott]

One thing I should have mentioned, if any of you are ordering rocker 
shafts for Vitesse or GT6 mark 1 (part #214562) have whoever you are 
ordering from make sure that locating screw (part #104859) fits in.  
There is at least one batch of rocker shafts that were tapped 
incorrectly.  Rimmer Bros and SpitBits know about the problem.

Roger

On 4/30/25 06:58, DAVID MASSEY wrote:
> Wikipedia has a fairly comprehensive page on Whitworth bolts
>
> https://en.wikipedia.org/wiki/British_Standard_Whitworth
>
> It looks like it might be a 7/32 which is between M5 and M6.  Good 
> luck finding one of those.
>
> Moss has them and Rimmer Brothers have them (part no 104859).  I 
> suspect there is one old bloke in the Lake District who still has the 
> tooling and is making them in his retirement.  Such was the nature of 
> the British Auto Industry in the early years after the war.
>
> Seriously, I'll bet Rimmer contracted a large quantity (1,000?) be 
> produced and sold half of them to Moss.
>
> But these are hex head rather than Pozidrive.  I have only a passing 
> familiarity with machine shop operations but I suspect that making the 
> hex head version is much easier to make using an NC lathe and 
> hexagonal feed stock.  Making a Pozidrive (or even Philips) would 
> require a stamping operation to form the head.  If you insist on 
> Pozidrive maybe you can arrange a swap with someone who has a 
> Pozidrive screw and is willing to use the hex head.
>
> Dave
>
>
>
>
> On Tuesday, April 29, 2025 at 07:30:40 PM CDT, Roger Elliott 
> <elliottr at rmi.net> wrote:
>
>
> Thanks Dave,
>
> I have a couple of the screws. (though mine have a Pozidriv head 
> instead.  The problem is I have 2 rocker shafts that were tapped for 
> the wrong size. So, I am trying to figure out if I could tap them to 
> the right size.
>
> What I said on a previous post was wrong.  I went back to a hardware 
> store and the locating screw slid right into the M6x1 tester with out 
> having to turn it.  So it is smaller than that.  It would not go into 
> a M5x.8
>
> I suspect you are right about it being a Whitworth.
>
> Thanks,
> Roger
>
> On 4/29/25 18:34, DAVID MASSEY wrote:
> Moss lists these as
>
> https://mossmotors.com/323-215-screw-shaft-locating 
> <https://mossmotors.com/323-215-screw-shaft-locating>
>
> It may be whitworth or something.
>
> Dave
>
>
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