holes in rim

for those with Series MM sidevalve cars produced between September 1948 and February 1953
doughicks
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holes in rim

Postby doughicks » Wed May 06, 2020 2:53 pm

Does anyone know why there are holes at the edge of the rim. Were the for hanging during painting?
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les
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Re: holes in rim

Postby les » Wed May 06, 2020 9:08 pm

Only the person who made the holes could tell you why !


alawrence10360
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Re: holes in rim

Postby alawrence10360 » Wed May 06, 2020 10:01 pm

Sounds painful

doughicks
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Re: holes in rim

Postby doughicks » Thu May 07, 2020 12:18 am

The only reason I ask is , every mm rim I have has these two holes. I have rims from different autos that have these holes. I assume they are factory.

ManyMinors
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Re: holes in rim

Postby ManyMinors » Thu May 07, 2020 6:39 am

I've seen the holes in MM rims as well but I don't know the reason for them I'm afraid.

les
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Re: holes in rim

Postby les » Thu May 07, 2020 9:45 am

I can see why you suspect a factory procedure, as the holes look remarkably equal in position from the rim edge but as mentioned not sure how you’d find the reason, even if that was the case. You never know though !


Murrayminor
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Re: holes in rim

Postby Murrayminor » Thu May 07, 2020 9:57 am

As the rim looks to be riveted I wonder if it was a production exercise, form one side of a rim then the other and the two sides were sent to the next person to rivet the rim together in the correct orientation for finalising.
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les
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Re: holes in rim

Postby les » Thu May 07, 2020 10:46 am

Two sides? It was only the centre that was riveted in place.


Murrayminor
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Re: holes in rim

Postby Murrayminor » Thu May 07, 2020 11:34 am

Oh well that's my theory out the window. :)
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les
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Re: holes in rim

Postby les » Thu May 07, 2020 12:02 pm

Well at least you had a theory! :D


RobThomas
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Re: holes in rim

Postby RobThomas » Thu May 07, 2020 7:36 pm

Those rims must have started life as a sheet of plain steel. Perhaps the holes were to give it a start on the big roller that formed the shape and rolled it into a circle?
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RobThomas
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Re: holes in rim

Postby RobThomas » Thu May 07, 2020 7:51 pm

http://www.freepatentsonline.com/4649253.html

Bottom left of page 5. Pin used to drive the rim round on the forming machine. Looks like the pin holes are opposite the hole drilled for the valve which I assume is near the weld line?
Cardiff, UK

doughicks
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Re: holes in rim

Postby doughicks » Thu May 07, 2020 10:24 pm

Rob,
Absolutely right. The valve stem hole is opposite the holes and that is where the weld is. Wonder if all rims are made this way. Have never noticed the holes any any other automobile rims. Will have to look at some other rims from different autos.
Thanks, That answers my question.

doughicks
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Re: holes in rim

Postby doughicks » Thu May 07, 2020 10:29 pm

Rob,
Good answer. The valve stem hole is opposite the holes and that is where the weld line is. Have never noticed these holes on any other auto rim. Maybe other manufacturers fill in the holes.
Thanks for the replies


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