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Floppy power mirror fix
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Thor-bob Premium Member
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Joined: May 30, 2011
Posts: 34
Location: The OC
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PostPosted: Tue Aug 11, 2015 3:36 pm    Post subject: Reply with quote

ALIKA T3 wrote:
Isn't the washer split from factory?


Hard to say.....

It has a ragged surface at the split as if it had failed in hoop stress.

The nut has two surfaces on the business end:
The outer half is flat
The inner half is a 60 degree cone

Normally a cone is used to create a certain level of friction, like a Morse Taper

The washer has a 60 degree surface that mates to the inner cone on the nut - this would cause enormous stress under normal use. Perhaps the washer was made with insufficient cone diameter, leading to this failure.

I suspect that the cone portion of the nut was used to center the washer under assembly.

A lower stress design would be to make the washer seat fully on the flat outer nut half, and keep the cone for centering. I will make one on the lathe of UHMW Plastic and try it out, then report back.

If this pans out, maybe Terry would like the shop drawing and start making some for all you late vanners...

Thor-bob


Last edited by Thor-bob on Wed Aug 19, 2015 5:30 pm; edited 1 time in total
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Thor-bob Premium Member
Samba Member


Joined: May 30, 2011
Posts: 34
Location: The OC
Thor-bob is offline 

PostPosted: Tue Aug 11, 2015 11:44 pm    Post subject: Reply with quote

Okay.......... did it, and it works.

Tightened the nut so the threads were about flush with the top.

Pics as follows:

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Locktite is drying ..... will know final result tomorrow.
*******************************
It's now later - mirror works great

Thor-bob
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