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Geometric Self Opening Die Heads
I've made simple die heads. Some driven by a tommy bar, others by a
pin in the mandrel that can be set up come out of the groove and free
spin when it reaches the stopping distance. recently I started
researching my $350 Lin Huan TL-25 lathe score in the long term plan
to getting it running again.
Its a copy of a Hardinge turret lathe. Jet, Enco, and probably some
others sold it under their own label with some form of "25" in the
model name. I've been watching videos during my connection time with
the brain sucker box while drinking coffee in the mornings. There are
lots of cool tool holders available for the turret, and I have some
ideas for the head stock top mounted parting blade holder to add "one
more" function to it for some repetitive jobs. There are parts I
would probably offer for sale more aggressively if I had this machine
running and a few setup configurations ready to go.
A lot of the "expensive" special tool holders for it are pretty easy
to make, and I may make them as needed or in some cases make batches.
I found only one really good video on setup for one of these machines.
Lots of guys did a short video that was basically "look at my
machine," and a number of machinery dealers did a short video showing
the machine runs and most of the function work, but there was only one
I found so far that seemed to show the setup and setting up a job.
Its about 3o minutes long, and its a little slow for my taste, but the
first 15 minutes shows his setup for a job, some of the limitations,
and finally cutting one piece in the job setup.
Here is where he introduces the part. https://youtu.be/WXoG9uEMIpA?si=li89-lU1laugGfOE&t=295
The video showed one tool that might very well be a challenge for me
to make. I also looked them up and new ones are fairly expensive. A
self opening die head. One some types of jobs this could really be an efficiency tool. I am sure I can my shop made simple die heads on the turret lathe much the same way I use them on the engine lathe, but I
have to stop, reverse, reengage the tool, thread the die off the part,
and then stop the lathe to switch it back to forward. The self
opening die head pops open when it reaches its "limit" which would
allow me to simple back off the turret and use the next tool. At most change the speed (which is supposed to be shift on the fly). A speed
change is something I would have to do anyway if the next tool demands
it.
If you don't want to watch the whole video here is where he runs
through one part.
https://youtu.be/WXoG9uEMIpA?si=eZCT38b5dpSwocNM&t=1141
I am sure if I look around I can find a used version of this tool for
less than a brand new one, but I need to ask. Have you used a tool
like this. The self opening die head, not a turret lathe. I am sure
lots of you have used a turret lathe. How easy was it to setup for
each job? How affordable where the thread jaws? Did you find it
worked reliably? Do you have nay other feedback for using one or
reasons not to?
"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
"Bob La Londe" wrote in message news:v6uh55$3mnvk$1@dont-email.me... Geometric Self Opening Die Heads
...
I am sure if I look around I can find a used version of this tool for
less than a brand new one, but I need to ask. Have you used a tool like this. The self opening die head, not a turret lathe. I am sure lots of you have used a turret lathe. How easy was it to setup for each job?
How affordable where the thread jaws? Did you find it worked reliably?
Do you have nay other feedback for using one or reasons not to?
Bob La Londe
----------------------------------- https://pounceatron.dreamhosters.com/docs/geometric-die-heads.pdf
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.
"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
---------------------------------
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.
Geometric Self Opening Die Heads
If you don't want to watch the whole video here is where he runs through
one part.
https://youtu.be/WXoG9uEMIpA?si=eZCT38b5dpSwocNM&t=1141
I am sure if I look around I can find a used version of this tool for
less than a brand new one, but I need to ask. Have you used a tool like this. The self opening die head, not a turret lathe. I am sure lots of you have used a turret lathe. How easy was it to setup for each job?
How affordable where the thread jaws? Did you find it worked reliably?
Do you have nay other feedback for using one or reasons not to?