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1960 Porter Cable Friction Wheel Fab


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#1 Salvagebeast OFFLINE  

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Posted March 31, 2013 - 11:03 AM

Shredded my primary belt this summer so made it my winter project. Disassembled and learned that there is a friction wheel that rubs against the outside of the drive belt when you pull the lever back for reverse. This wheel over time had worn down to the point where the two pulleys were grinding against each other... which caused the belt to shred. So, the challenge to make a new one began.

First of all, I had to determine what the old wheel was made out of, then decide what material to make a new one from. The original is laminated paper, like used for gaskets. Not easy to find 1/2 inch thick laminated paper. So after discussing with my dad and several friends, we decided to use Micarta, which is actually a laminated paper mesh. Below are some pics.

This mower goes backwards better than ever!! Used a hole saw for the inside and outside diameter, pressed it on with my arbour press, then after bolting to the shaft and started the mower, I turned it down slightly to the perfect outside diameter.

Attached Thumbnails

  • Frictionwheel03.jpg
  • Frictionwheel01.jpg
  • Frictionwheel02.jpg

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#2 MH81 OFFLINE  

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Posted March 31, 2013 - 11:13 AM

Glad you found a substitute and had positive results.
Thanks for sharing and :welcometogttalk:

#3 motobreeder ONLINE  

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Posted March 31, 2013 - 11:54 AM

Welcome to the forum.  Thanks for sharing your solution.

 

I'm not familiar with a Porter Cable that has uses a friction disk for reverse.  Would love to see some pictures.



#4 gopher OFFLINE  

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Posted March 31, 2013 - 12:04 PM

That is one fine job of fab the disc. Not familiar with Porter Cable either. Is there anything to hold it in place besides being pressed on?



#5 CRFarnsworth OFFLINE  

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Posted March 31, 2013 - 04:28 PM

You did some nice work. I didn't have a clue as to what you were talking about, but i'm glad you found a viable solution to the problem. :thumbs:   Thanks for the pictures and the education.  Rick



#6 Salvagebeast OFFLINE  

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Posted March 31, 2013 - 07:05 PM

The friction wheel was pressed on more after the pic, then the bottom pulley installed under it.  So the wheel is sandwiched between a top smaller pulley and a bigger bottom pulley.  Here is a pic of the mower.

 

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  • PorterCableMower.jpg

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#7 motobreeder ONLINE  

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Posted March 31, 2013 - 09:06 PM

Thanks for the picture.  Didn't know what kind of drive system that model would have.






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