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I Forge Iron

Rob G

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    macon, ga
  1. i am not aware what T-6 mean... the piece is just sculptural, i got the mat'l for free
  2. we are talkin hot. i use the stick leave black mark method. btw i am using 7075-T6 alloy. not sure if i can go hotter with this or not.
  3. i guess the force a flypress can deliver depends mostly on the lead of the screw and the weight of the wheel. i'm punching 2.5" holes through 3" thick aluminum. can that be done on a flypress in the size range oldworld anvils offers?
  4. the machine does most of the work though
  5. how do i tell how much tonnage the popular flypresses at oldworlds anvils will generate? i need i think i need 50 tons. i have been working on a jack press that goes to 100 tons but it is way too slow. thank you
  6. Rob G

    Show me your Lathe

    which one? i got 7 of em.. B)
  7. lol at this whole thread. if you want a fly press screw made... you know who to contact. B)
  8. Cutting a tapered dovetail sounds like a pain. How would you do that?
  9. ok i already posted the answer twice yet no one has picked up on it. the answer is the screw is going to be a 4 start w/ a 1" pitch. this answers all the information needed in order to cut the screw and meets the original requirements of having a 4" lead and setting the lathe at 1/4 tpi.
  10. Pitch is the distance from a point on one thread to the same point on the next thread. Depth of thread is based on the pitch the solution here is 1" pitch with 4 starts.
  11. your elementary explanations are frustrating as they reveal you don't understand what my problem here was. yes hw i'm aware of what starts are and machinery's handbook. the question is do you even understand what my problem is before you even give me advice.
  12. another dim light bulb moment, and i think i got it this time. with a pitch of 1, this gives 4" lead with 4 starts as the lead is number of starts times pitch. lathe is set at 1/4 tpi as required this is right, and i'm trying to write an explanation, but it is so hard for me to articulate. for example the first thing i say in my idea above is "with a pitch of 1". i give no citation as to how i came up with this figure and it appears i snagged it out of thin air. however, now that the numbers are written down, they can be run through and proved correct so it really doesn't matter. i suppose as long as you have an understanding it doesn't matter whether or not you can articulate. what makes it so odd to explain is that it was figured using the relationship between the required lead and the required setting the lathe at 1/4 tpi. this is NOT the order that most screws are figured in, but it had to be done this way with this screw because it is so different. while i did figure it out i'm sure there is a better way to understand this.........
  13. **edited because my calcs were wrong. see latest post.**
  14. **edited because my calcs were wrong. see latest post.**
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