Hub Questions

[AirAg]

So I finally was able to track down a hub for my E185 spline crankshaft.

Now the questions begin:
What is the minimum bore size I should go on a wood prop? I am planning on machining this thing myself and need to know what size to make the OD of this hub. If you count the OD of the external splines, then it is 3.875", with 3.625" without the splines. The center section is 3.125" and the part closes to the flange is 3.625". I believe I will use a custom made spacer to convert to the normal 6 hole pattern. Any help on what size to turn the OD.

By the way, inside the hub, you have a tapered spacer that is held in by a nut screwed onto the end of the crank. I think I can take the hub down to the OD of the tapered bushing...not sure though.

Any one seen one, and if so, what does it look like finished.

Thanks,

Brent

 

[DAGWOOD0520]

I am not positive , but you could get a new wood prop cut to fit that hub that you have now. I have also seen flanges welded on the shaft and then the prop just requires a 3" bore and thats it. I could be wrong but that hub in the photo looks like a jacobs off a sterman, we make stick props around 74" for that hub all the time --LAL--

 

[AirAg]

Thanks for the reply....This particular hub came off a Continental 220 Radial....I still think I can cut this thing down to 3.125" to 3.25" and still be ok with the bore of the wood prop. Use an 1.5" spacer to fit between the flange and the prop. I am trying to use this prop I have as a test prop, just to make sure everything runs etc...It is an 72x40 (too big I think). Anyway, just wanted to know what diameter it is usually turned to.

Thanks,

Brent

 

[DAGWOOD0520]

If that 72-40 is a wide blade than it is more than likely to much prop.