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Cam powered hammer build question

Barnbikes

Registered
Building a cam powered beam hammer. Have a 16# sledge head I plan to put on it.
Do I want to leave the head domed or make it flat?
Not sure it it makes a difference but figured it would not hurt to ask. Read that a domed head will spread your metal and a flat face will not.

Thanks
Jon
 

Joel Sanderson

Registered
A domed head, as you put it, would be harder to use than a flat head with tooling--spring swages or hand held tools like cutters, drifts or whatever--so with most hammers, I recommend flat dies. But if you're making a helve hammer where the head is going to hit at different angles depending on the stock thickness, it might be better to leave it somewhat curved, especially if most of your hammering is going to be directly between the dies. You can always change it later.

Does your sledge have two faces? Could you somehow engineer it to be turned over and have one side flat and the other domed? That way you could switch depending on what you're doing. That'd be fun.
 

Barnbikes

Registered
Joel thanks for the reply.
Yes the sledge is 2 sided. The plan is to drill the handle hole out and replace it with steel rod (1.5"?). Then I will cross drill the head for a bolt so I can flip the head. Never thought of having one side flat and the other domed.
Already have plans for multiple height bottom dies for different materials.
On the lookout for a large vbelt pulley to drive the cam but no luck so far. Where are all the junk squirrel cage fans when i need one.
 

Pete Spaco

Registered
If the hammer only uses gravity to drop it onto the work, I think you will be disappointed with its 16 pound weight.

Pete Stanaitis
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Barnbikes

Registered
Well after 2 months of collecting parts I have decided to go down a different path.
Have decided to go manual foot powered - more control then the electric power project.
Have decided to copy this one I found on line.
30.JPG
31.JPG
Could not find a cart wheel or pulley I like so I built one. 11 ga steel.
33.JPG
Now just need to decide on I-beam or wood uprights.
 

Pete Spaco

Registered
Yes, I think that design has a much higher chance of success. You get some acceleration to increase power to the work.
But I still think you will find that a 16 or even 20 pound hammer will give disappointing results.
See:
https://spaco.org/trdlhamr.htm

Pete Stanaitis
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Edgar

Subscriber
Last Subscription Date
03/18/2019
Here is an original treadle hammer or riveter..im calling it a hammer bc thats what you do with it..you can change dies in it to whatever you can think of or make..built close to me at ellis machine works .memphis tn..only one ive been able to find20190818_182253.jpg
 
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Edgar

Subscriber
Last Subscription Date
03/18/2019
Heres a treadle hammer...built in Memphis tn and cast there at ellis machine works...yiu can change dies out ti whatever desi
 
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