Power hammer build

I'm mock up what the final height would end up without trimming and see where it hits you. This can be as simple as sticking a wooden block the correct height on top of the anvil.

I see a fair number of blacksmiths having to stoop down to use their power hammers, and it just doesn't make sense to me. Of course, having herniated disks in my lower back kind of colors my view on tasks that require a lot of bending over. :(
 
Knurl or not?

I'm taking the motor to the college with me today, and I'm going to start working on the contact wheel for it. And I'm trying to decide if it would be beneficial to knurl it for extra grabbing power, or if it would tear up the tire. I can make like a really fine knurl and not go to deep so it's not real aggressive.
 
Well, we've got two more items checked off.


The other day I stopped at the scrap yard and checked around for a spare tire. I looked for a solid one, but after looking in the trunks of a good 35-40 cars settled for a good condition inflatable spare tire.


Tire- $15.00







Then the other day I started working on the contact wheel for the motor.


I started with a piece of 2.5" 12L14, ran a skin cut along the surface to pretty it up,


Drilled through it 39/64" dia, and reamed it to 5/8 for the motor shaft.


Then I drilled out the other side up to 1.5" (to lighten it some)


(1.5" is a big drill bit!)






After drilling I bored it out to 1 5/8" (I didn't really need to bore it, but I did it to clean up the surface, the large drill bits are in poor condition and leave a rough surface).







Then I turned down the end where the motor shaft inserts, as it didn't need to be as big, and it would help remove some more weight.

I also chamfered all the corners so I wouldn't have any sharp edges.






Next I broached the 3/16" key way then drilled and tapped a hole on the backside for a 1/4-20 set screw.






Finito!


 
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