Threshing machine pulleys

Minnesotaman630 · Oct 27, 2016

I am restoring a McCormick Deering 22x38 threshing machine. I am working on making new paper pulleys and was wondering what degree of angle do these pulleys need to be machined to for the belt to run good on them?

Bob · Oct 28, 2016

I can't help you, but I'll bet there's a page (somewhere) in "Machinery's Handbook" that will spell that out.

Or, pester the folks at www.paperpulleys.com and see if they will share a few "trade secrets" with you.
Found it

unc · Oct 31, 2016

Back in the day, rule of thumb on iron or steel pulleys was 1 degree of taper per side. I don't know if this applies to the paper or Rockwood type of pulley. Now you have got me curious. I have a Massey 102 Junior out in the yard that needs the belt pulley rebuilt. What material did you use to replace the paper? For those that are unfamiliar with paper pulleys, when they have sat outside for fifty or sixty years, and you engage the PTO without thinking, the results are SPECTACULAR! unc

Minnesotaman630 · Nov 1, 2016

I used Masonite board to construct the
pulley. I cut the circles out and used
wood screw to hold them together then
put the outside metal rings on. I am
trying this on a test run to see if it
gonna hold up as well as a the actual
paper pulley. It seems to be a bit
cheaper route than going through the
paper pulley company.

unc · Nov 1, 2016

(quoted from post at 17:43:17 11/01/16) I used Masonite board to construct the
pulley. I cut the circles out and used
wood screw to hold them together then
put the outside metal rings on. I am
trying this on a test run to see if it
gonna hold up as well as a the actual
paper pulley. It seems to be a bit
cheaper route than going through the
paper pulley company.

Sounds like a good idea. Masonite is a fairly dense material- I would think it will polish up with use. unc

Threshing machine pulleys

Minnesotaman630

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Bob

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unc

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unc

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