[Staowners] STARTING HANDLE CRANK HOLE CHROME FLAP

[Bob Hamilton]

Hi Steve and interested others,

I agree with you totally on this slot problem as even the depth of 
this saw cut is different on each piece which I did bring to the 
attention of the Bamforth's but never received a reply or a 
replacement. One was very deep and didn't leave much material and 
could have broken off and lose the cover.

The solution is to make one as detailed by Steve below.

Regards,
Bob


At 03:15 PM 12/22/2007, CotaLymepond at aol.com wrote:
>Hi All .... I purchased the complete Crank Flap cover,  with all the 
>bits and pieces
>  from the Bamforths some four years ago,  It seems to be a good 
> quality reproduction.
>The only issue I have had with it, and I would check this issue out 
>with any other reproduction as well, is the diagonal slot for the 
>retaining pin that is cut into the square retaining shaft,  Because 
>of the small quantity's involved, this slot is usually made by 
>sawing into the shaft with some kind of saw blade.
>  The problem with this manufacturing method is that the saw blade 
> leaves the bottom of the slot with square corners, and the points 
> of this square create a stress point where cracks will develop as 
> there is not much material in this area, and cracks like to start 
> in non radiused corners.
>Our's failed in this critical area and broke off in my hand,
>(during the concours judging at the Stowe British Invasion no less)
>I solved the problem by making a new bar, the material is simply a 
>piece of steel Key stock with a hole drilled through one end and a 
>slot in the other, I cut the new slot with my milling machine which 
>left a nice round shape in the bottom of the slot reducing the 
>chance of stress cracking, For those of us who don't have that sort 
>of equipment, you can achieve the same result by first drilling a 
>hole through the bar at the spot where the slot should end and then 
>cut the angled slot with a saw being careful not to nick the rounded 
>portion of the hole as any nick will provide a place for a crack to develop.
>  You could also make the slot with a tiny round file, if you wish.
>
>   Happy  Holidays
>  <> Steve Cota <>

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Robert A.C. Hamilton, P.O. Box 5033, Waverley, Nova Scotia, B2R 1S2
E-Mail: hamilton at accesswave.ca or robertach at ns.sympatico.ca
Tel: 902-861-3277  Fax: 902-861-1361
Home Page: www.accesswave.ca/~hamilton
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