[RA1John]

Does anyone have a 4-blade, 19" dia., 2-5/16" pitch fan that they could share a pic of? I'm curious as to how/where the pitch is measured.

Thanks!

[PurelyGTO68]

Originally Posted by RA1John

Does anyone have a 4-blade, 19" dia., 2-5/16" pitch fan that they could share a pic of? I'm curious as to how/where the pitch is measured.

Thanks!

I looked at mine a short bit ago. Not sure how the pitch is measured but I think it's generally rise over run. If that is the case then the rise is about 1 9/16" divided by run of about 3 1/2" (width of fan blade). I believe the math works out to be 2.24 so that is just shy of 2 1/4". If my measurements are off by 1/16" then that could account for the variances from 2 1/4" to 2 5/16" I suppose...



Sent from my XT1585 using Tapatalk

[RA1John]

Parts catalog, Mar. 1969...





Part # 519834 has a lot of usages. All are 19" diameter with only (1) application noting the pitch as 1-5/8". Where did 2-5/16" pitch come from?