Hi, I am after a die holder, one that will stand up to use by school pupils who have a tendancy to over tighten the grub screws stripping the threads, and making the holder useless. We have re-tapped the holes, but they get stripped again.
Only the holder, any recommendations?

misterroy Wrote in message:
Hi, I am after a die holder, one that will stand up to use by school pupils who have a tendancy to over tighten the grub screws stripping the threads, and making the holder useless. We have re-tapped the holes, but they get stripped again.
Only the holder, any recommendations?


Use softer sacrificial grub screws? Plastic?
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

"misterroy" wrote in message
...

Hi, I am after a die holder, one that will stand up to use by school pupils
who have a tendancy to over tighten the grub screws stripping the threads,
and making the holder useless. We have re-tapped the holes, but they get
stripped again.
Only the holder, any recommendations?


Helicoil the tapped holes - the material helicoils are made from is
extremely tough - alternatively re-introduce the concept of discipline into
the school - tell them not to then enforce the instruction.

Andrew

On Wednesday, June 6, 2018 at 4:53:22 PM UTC+1, Andrew Mawson wrote:
"misterroy" wrote in message
...

Hi, I am after a die holder, one that will stand up to use by school pupils
who have a tendancy to over tighten the grub screws stripping the threads,
and making the holder useless. We have re-tapped the holes, but they get
stripped again.
Only the holder, any recommendations?


Helicoil the tapped holes - the material helicoils are made from is
extremely tough - alternatively re-introduce the concept of discipline into
the school - tell them not to then enforce the instruction.

Andrew

I like the sacrificial screw and the helicoil suggestion.
The enforcing the instruction does not work. They lack the experience to know how much force is too much. I was once busy keeping things safe at the forge and I could see a pupil working with a hacksaw. It was 8mm annealed silver steel he was cutting. I saw him hard at it between the pupils I was supervising at the forge. After about 25 minutes of him sawing, there was no-one to supervise at the forge, so I went to see him. He had made a 2mm deep cut, in 25 minutes of work. I had a go. I added very little to the cut, but I knew something was wrong. The only teeth on the hacksaw were in the last inch at the ends. In the middle there was not even a sign of teeth it was rubbed smooth.

On Wed, 6 Jun 2018 14:35:02 -0700 (PDT), misterroy wrote:

I like the sacrificial screw and the helicoil suggestion.
The enforcing the instruction does not work. They lack the experience to know how much force is too much. I was once busy keeping things safe at the forge and I could see a pupil working with a hacksaw. It was 8mm annealed silver steel he was cutting. I saw him hard at it between the pupils I was supervising at the forge. After about 25 minutes of him sawing, there was no-one to supervise at the forge, so I went to see him. He had made a 2mm deep cut, in 25 minutes of work. I had a go. I added very little to the cut, but I knew something was wrong. The only teeth on the hacksaw were in the last inch at the ends. In the middle there was not even a sign of teeth it was rubbed smooth.

Clearly had no idea how much work it should be, so not clear to them that it was
much more work than it needed to be...

My idea is to use thumbscrews -- the knurled fastener, not the torture device--
to limit the torque on the screw.


Thomas Prufer

In article ,
misterroy writes:

I like the sacrificial screw and the helicoil suggestion.=20
The enforcing the instruction does not work. They lack the experience to kn=
ow how much force is too much. I was once busy keeping things safe at the f=
orge and I could see a pupil working with a hacksaw. It was 8mm annealed si=
lver steel he was cutting. I saw him hard at it between the pupils I was su=
pervising at the forge. After about 25 minutes of him sawing, there was no-=
one to supervise at the forge, so I went to see him. He had made a 2mm deep=
cut, in 25 minutes of work. I had a go. I added very little to the cut, bu=
t I knew something was wrong. The only teeth on the hacksaw were in the las=
t inch at the ends. In the middle there was not even a sign of teeth it was=
rubbed smooth.

I was doing some DIY at someone's place where I didn't have any tools.
Went to local hardware store and bought a hacksaw. It cut through one
wood screw with difficulty after which it had no teeth. Took it back
and after saying the chocolate hacksaw blade wasn't any use, got my money
back.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]