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[Vinny]

Welcome Fortis!!!

[randyc]

This is a simple modification that I saw in “Practical Machinist”.  The original poster suggested that grade 8 fasteners could be used to make tooling for a press.  I thought that the idea was pretty creative.

For many applications, this would eliminate the need for tool steel/heat treating. (Grade 8 bolts are about Rockwell C30.) I wanted a set of undersize punches: 1/8, 3/16/ ¼, 5/16 and 3/8.

(I get frustrated trying to align a drift under the arbor press ram, positioning it on the work and then pressing out a pin with only two arms. I thought that this concept would male the process a lot easier.

Drill and tap the arbor press ram (in my case 1/2-13):


  press2.jpg (Size: 13.88 KB / Downloads: 216)

After milling a pair of wrench flats on the bolt, turn off the head and turn to desired configuration:


  press4.jpg (Size: 17.21 KB / Downloads: 216)


  press6.jpg (Size: 16.22 KB / Downloads: 216)

The set and a small punch in the arbor press:


  press8.jpg (Size: 24.22 KB / Downloads: 216)


  press9.jpg (Size: 17.06 KB / Downloads: 216)

These were made mainly for removing dowel pins, as noted previously. But using a bench block as a die and touching off the end of two of the drifts on a disc sander to sharpen, I made some small gaskets, using double-back carpet tape to fix the bench block location under the ram. With the right configuration of tooling, modest punching and cold-forming could be done.

Also, I guess I posted my rotary broach description in the wrong place. Should have been here but this is where I put it, sorry:

http://www.metalworkingfun.com/showthread.php?tid=3647

randyc

[TomG]

Randy,

Is that an HP11C I see on your bench? I thought I was the only one using the benefits of RPN around here.

Tom

[Dr Stan]

Good idea.

[randyc]

(08-10-2017, 07:42 AM)TomG Wrote: Randy,

Is that an HP11C I see on your bench? I thought I was the only one using the benefits of RPN around here.

Tom

Hi Tom,

I have three of those old HP-11C calculators (for the same reason that I have three pairs of glasses) LOL.  I think that model is the best compromise between size/capability of anything I've used.  The one in the photo is about forty years old and my other two are a couple of years younger.

No problems with any of them and the battery life is amazing - measured almost in decades rather than years !  I occasionally use algebraic calculators but why deal with all of those parentheses unnecessarily ?  RPN forever !

randyc

P.S. I also still own a slide rule - no problem with battery availability 

[TomG]

The one you see in my videos was purchased in the late 80's and has been hard at work in the shop ever since. It still works fine, but is getting so beat up that I recently invested in a backup one off ebay, just in case. RPN makes so much sense that I don't understand why anyone would bother with algebraic calculators, or why they even exist.

I recently saw a NOS K&E slide rule on the Facebook Marketplace, but as tempting as it was, I just couldn't do it.

Tom

[the penguin]

(08-09-2017, 09:42 PM)randyc Wrote: This is a simple modification that I saw in “Practical Machinist”.  The original poster suggested that grade 8 fasteners could be used to make tooling for a press.  I thought that the idea was pretty creative.

For many applications, this would eliminate the need for tool steel/heat treating. (Grade 8 bolts are about Rockwell C30.) I wanted a set of undersize punches: 1/8, 3/16/ ¼, 5/16 and 3/8.

(I get frustrated trying to align a drift under the arbor press ram, positioning it on the work and then pressing out a pin with only two arms. I thought that this concept would male the process a lot easier.

Drill and tap the arbor press ram (in my case 1/2-13):



After milling a pair of wrench flats on the bolt, turn off the head and turn to desired configuration:





The set and a small punch in the arbor press:





These were made mainly for removing dowel pins, as noted previously. But using a bench block as a die and touching off the end of two of the drifts on a disc sander to sharpen, I made some small gaskets, using double-back carpet tape to fix the bench block location under the ram. With the right configuration of tooling, modest punching and cold-forming could be done.

Also, I guess I posted my rotary broach description in the wrong place. Should have been here but this is where I put it, sorry:

http://www.metalworkingfun.com/showthread.php?tid=3647

randyc

Damn It Randy!!


First the rotary broach, now press pins, you might be setting the bar too high. I just use punches and sockets in the arbor and hydraulic presses. This is like a gauntlet thrown down, now I have to up my game <sigh>

[wawoodman]

What jack said.

But this one, I actually think I can do. And if I needed a solid end on the ram, just run in a bolt.

(And I have my dad's old slipstick!)

[randyc]

You guys give me W--A--Y too much credit; the stuff that I do is mice nuts compared to most of the tools/projects that I've seen in this thread !!!

[Highpower]

Not much going on lately I'm afraid but I did manage to crank out a pair of "Wright Rollers" a couple of months ago.