Hand crank blower designs?

Robert.B

Robert.B

Joined
Apr 17, 2003
Messages
5,283
I've looked around and dont have access to a blower to pull apart and see exactly what i will need to make one, and the actual componentry of the internals...i'm a machinist by trade so will be making it myself but if anyone has either drawn designs of one or one pulled apart that they could photograph the internals that would be really helpful.

I've gone through about 50 different pages with forge designs and the majority are for electric coal/charcoal blowers or making propane blowers (i like to work with charcoal).

Any help will be very much appreciated. :thumbup:
 
It is a very simple centrifugal fan. Not too different from a squirrel cage fan. At least that is what I have. Somewhere I have a book that shows a sketch, but I dont know just where and I don't remember just which book. It may have been Weyger's book.
Imagine a hub with the fins perpendicular to the axis of rotation in a case.

ron
 
The one that i have cranked made by "Canadian Blower & Forge" has a gearing system.

Maybe 40-50 rpm input for full output....

If you are desperate, I may be persuaded to dig and look at in depth for you.

PM me if you don't get Bruce's
 
there is a fantastic book: Gingery-how to design and build Centrifugal Fans for the home shop.
Really interesting. I'm thinking to make one for my coal forge as well as I can't find a blower at a resonable price here.

If anyone has suggestions, they will be highly appreciated!!!
 
Bruce Bump said:
I have an old blower out in the shed. I wonder what it would cost to just ship it to ya?
Click to expand...

i dunno how much something like that would cost to ship, maybe usps or one of them can give you a quote...i'm more then willing to reimburse you if it isnt too much (i'm guessing it will be at least $80 considering they weigh a bit).

I'd be really grateful though as i've spent 3 years trying to track one down and when one comes up on ebay they wont ship it...pick up only. :(

as for a traditional type bellow i just prefer the cranked ones because thats what i learnt to forge with...but the guy that taught me wasnt willing to part with any of his :p australia kinda sucks for forging supplies, 99% of my gear including anvil i made myself from billet steel.
 
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Robert it is always going to be nice to have a authentic version. If that does not work out send me an email and I will send some photos of the internals of my hand winder.

Mine has three shaftes to multiply the rpm. The handle has a cog on it withmay be 3 to four inch diamiter with small teeth. That turns a small cog wheel about 1 inch diamiter. On the other end of that shaft is a cog the same size as the handle cog. That runs on a 1 inch cog at the bottom of the casing that cog shaft is the fan shaft.

I am not sure of the actual numbers but basically turn the handle once and the fan turns about 20 or 30 times. About on handle turn per second or 2 is a nice speed. Crank faster for more heat. The fan can be made from a sheet of sheat metal. If you get that far i will go to the effort of openning it right up to expose the fan as well as the cog drive.

rellery@iinet.net.au
 
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Hi! This is the first thing I post here, I've been reading for a few months now. Some months ago I found a site for appropriate technology for third world development and there are 2 of the thousands of bulletins available, that deal with blacksmithing and blowers. A double action inner tube bellows by Inversin, and an oil drum forge with single action inner tube bellows and the construction of a centrifugal blower in the same bulletin; they are in this address (just checked and they are still there).

http://www.cd3wd.com/CD3WD_40/CD3WD/index.htm

Just go down about 2/3 of the page.
Hope it is useful.

Ruben
 
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great links and thank you guys for your responses, Bruce is currently looking into sending me one of his hand cranked blowers when he has time so i'm going to take him up on that and hopefully have a decent forge setup by the end of this year. I will be sure to post pics after all is completed and tested.

Thanks guys!
 
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