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Show me your mechanical hammer
This is a discussion on Show me your mechanical hammer within the Power Hammers forums, part of the Blacksmithing category; My Blacker Model C. Not for the faint of heart!...
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10-16-2007, 10:41 AM
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yeah, seems impossible doesn't it frosty, but that little helve is amazing, it runs real fast about 300 bpm and it really hits hard, BT and jrmy have tried it, also bill epps and honest bob at possums hammer in. Hard to explain without trying it. 6 lbs is the weight on the end of the helve. may be a tad more, just guessing.
__________________ Irnsrgn Knowledge must be shared or it lies dead in the mind. The Blacksmith must use Hammer and Flame to force the iron down the path of his own choosing. I usually find it much easier to be wrong once in while than to try to be perfect.  |
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10-16-2007, 04:18 PM
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Not impossible, just amazing. It looks like the helve is on a solid fulcrum and the spring relief is in the crank linkage. This means all the weight in the helve and solidly attached linkage gets to take part in each blow. Figuring exactly how much the weight translates to for moving metal is far trickier than my math allows. It's why there are standard slug sizes for calculating these things. Place a slug on the die, give it a whack and measure how much it moved to find out how much energy was shed. Anyway, it's actually more than a 6lb. hammer though it's still light. Fast makes up for mass and 300 bpm is fast. Still an amazing little hammer. I'd like to give it a try some day. Frosty
__________________ Outside of a dog a book is man's best friend. Inside a dog it's too dark to read. "Groucho Marx" |
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10-16-2007, 08:48 PM
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the cam which operates it only moves the back an inch, which opens the dies approx 6 inches.
__________________ Irnsrgn Knowledge must be shared or it lies dead in the mind. The Blacksmith must use Hammer and Flame to force the iron down the path of his own choosing. I usually find it much easier to be wrong once in while than to try to be perfect. |
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10-16-2007, 09:10 PM
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linkage shown
__________________ Irnsrgn Knowledge must be shared or it lies dead in the mind. The Blacksmith must use Hammer and Flame to force the iron down the path of his own choosing. I usually find it much easier to be wrong once in while than to try to be perfect. |
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10-16-2007, 09:39 PM
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Frosty - As someone who has actually used Jr's power hammer.... I will say it does what he says... it does hit hard and has great control. I didn't have time to try out his 50lber but the Depew is a great little hammer. I just wish I had more time to play with it. - JK
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10-18-2007, 10:26 PM
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That's quite the little hammer. Thanks for the pic of the linkage, saved me from asking.  About the only way to really tell what the total reciprocating weight is would be take the arm off and weigh it. Doing a rough guess I think it looks to be in the 20-25 lb range. A large part of how hard it hits is the rigidity of the hammer, the upper die is coupled directly to the pivot so there's not much give, just the natural flex in the short length of wood. The linkage in more common hammers has the weight hanging from a spring so all it's impact is kinetic energy. This little gem is basically a lever with the upper die hard coupled to the frame. Small wonder it hits so hard. Hmmmm. Think I'd call it the, "Small Wonder," were it mine. Frosty
__________________ Outside of a dog a book is man's best friend. Inside a dog it's too dark to read. "Groucho Marx" |
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10-18-2007, 11:02 PM
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I'd call it "Woody", both for the wooden arm and the no doubt woodpecker like action  .
__________________ Founder and first member of the SBA, The Space Blacksmith's Association! |
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