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  #11  
Old 01-24-2011, 11:51 PM
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arizonian arizonian is offline
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I wasn't really thinking when I posted earlier. It would help if you had a sketch of your build or line of thought.

Length of travel and direction of motion are key to understanding how to lay out the arms in relation to the cylinder(s) and the punch and die frame setup. You essentially trade decreased motion on one end for an increase in force, like a lever. How do you get plan to get a vertical or near linear motion?

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  #12  
Old 01-25-2011, 01:45 AM
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Yeah I should draw something up, mostly what I am going to build is the Scotchman version because that is what I have available to measure and scale.
I know that the cutting side of the arm will not be 1 foot away from the pivot point so I am not thinking that I will need a 4 foot arm. But stil many hours of designing
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  #13  
Old 01-26-2011, 05:06 PM
mike van mike van is offline
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Here's a picture of my Uni-Hydro 56/14 as I was bringing it home a feww years ago. All the pivot points are bushed as someone said. A true joy to own & operate.
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Last edited by cutter; 01-26-2011 at 06:39 PM.
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  #14  
Old 01-26-2011, 05:32 PM
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Mike Van,

First off welcome to this little part of the world. I really like your slug tray and drop off system. You stated the photo was of when you brought the 56/14 home, so I assume it was on there already. I may make something similar for my 42/14. How do you like the Uni-Hydro?

Last edited by Pat; 01-26-2011 at 05:33 PM. Reason: Goofed
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  #15  
Old 01-26-2011, 06:17 PM
mike van mike van is offline
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Hi Pat - I bought the machine used, barely used. The previous owner had made the chute & catcher, it does work good. The machine itself is just something to behold when it's being used, people watch in awe as it punches a 3/4 hole in a second. Sure beats the pilot hole, oil can, finished size, oil can, clean up the mess. I don't use it a lot, or haven't yet - but there's a few things yet I need to build at the sawmill, so it should get the dust wiped off it from time to time. As far as building one of these, build heavy is all I can say. Hydraulic pressure never ceases to amaze me.
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  #16  
Old 01-26-2011, 06:42 PM
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Welcome aboard, mike van.

Please check out the first item in our FAQ.
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  #17  
Old 01-26-2011, 06:53 PM
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arn Owl
Which model Scotchman are you going to copy. Several different styles available.

Jerry
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  #18  
Old 01-27-2011, 04:32 AM
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midmosandblasting midmosandblasting is offline
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Welcome Mike Van. Our way of doing pictures is covered in FAQ. The new software will resize a lot of them so the 100K can go up a bit.
Be sure to check out these special sections of our site that you might not be aware of:

1. http://www.shopfloortalk.com/forums/faq.php 2.Product/Equipment Review Index

3.. Website Equipment, Supplier and OEM Index

4. http://www.shopfloortalk.com/forums/faq.phpEquipment Index[/URL]

5. Tricks and Tips

We look forward to adding your projects, tips or product reviews to these indexes in the near future.
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  #19  
Old 01-27-2011, 06:11 AM
mike van mike van is offline
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Thanks for all the tips - Mike
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  #20  
Old 01-27-2011, 10:26 AM
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Mike, welcome to the site, and Barn Owl here's another thought.
I have a 21 ton mechanical ironworker. It uses a crank and pitman arm to multiply torque and tonnage. You get 21 tons pressure out of a 1 hp motor linked mechanically. It may be worth thinking about.
You could have a hydraulic cylinder on a bellcrank arm with a second mounting hole close to the pivot shaft. On this you would have a connecting rod to the shear plate. You only need about 1/2 inch of movement on the shear plate so it could be setup so the connecting rod to the bellcrank is almost over centre as the shear closes.
At the 20 degrees and less point before top dead centre, the leverage is immense.
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