Re: Geometric Self Opening Die Heads

On 7/16/2024 4:33 PM, Jim Wilkins wrote:

"Bob La Londe"  wrote in message news:v76nhd$1ee1n$1@dont-email.me...
 On 7/14/2024 10:39 AM, Bob La Londe wrote:

On 7/14/2024 4:04 AM, Jim Wilkins wrote:

"Bob La Londe"  wrote in message news:v6uh55$3mnvk$1@dont-email.me...

Geometric Self Opening Die Heads
...
How affordable where the thread jaws? ...

>
https://www.travers.com/category/chasers
https://www.wttool.com/516-d-regular-high-speed-chasers

>
Ah... the cost of the "chasers" is really what I was wondering about. Thanks.  I probably wouldn't buy a new die head at this point, but it would be nice to have a couple sets of dies "chasers" if I decide its worth the trouble to integrate into a process.
>
It looks like they are just referenced by slot size.  I wonder how interchangeable they are.
>

 Looks like I may have been wrong.  They appear to be referenced by
maximum thread size.
Bob La Londe
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Turret lathe tooling is beyond my experience. I have enough trouble picking up a thread to extend it, perhaps from the wear and play uncertainty of my old lathe. I have six 3/8" x 5" Grade 8 bolts to modify with another 1/2" of thread, because the store doesn't stock the 4-1/2" long bolts that would fit better. The supplier was there taking inventory when I looked and we discussed which area stores had more room for larger selections, but I had recently checked one of the best and not found 4-1/2" Grade 8 there either. At least threading is indoor work, out of the East Coast "heat bubble" of tropical humidity.
 I'm upgrading my hoisting equipment for the 4500 Lb log in queue for the sawmill. Weighing it at both ends (2570+1930) damaged the tripod baseplates and pushed the rest close to its rated limits, so I bought G100 overhead lifting rated chain and fittings to upgrade. Apparently the difference between G80 or G100 alloy and G70 transport chain is better shock overload capacity, carbon steel chain may be more brittle. I've seen (from a safe distance) falling logs break equipment.
 The new tripod baseplates are 14 gauge CRS steel remnants hammered into shallow bowls over a depression in wood, with their corners turned down and a flanged hole in the middle that serves as a socket for the ball or acorn lower end caps on the tripod legs. They dig in at the flange rim and corners without seriously damaging the lawn and 14ga was probably the thickest steel I could hammer to shape neatly on the wooden 'stump' and my anvil. The bowl shape stiffens them and causes them to sink straight into soft soil instead of twisting.
 

Yeah, at a little over 2 bucks a piece for the cheapest ones in the right size I'd modify hardware store bolts too.
https://www.mcmaster.com/products/bolts/fastener-strength-grade-class~sae-grade-8/thread-size~3-8-16/length~4-1-2/
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Bob La Londe
CNC Molds N Stuff
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