Author Topic: Threading Die Holder  (Read 24863 times)

Offline Stilldrillin

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Re: Threading Die Holder
« Reply #25 on: April 03, 2009, 01:59:06 AM »
Darren,

Absolute top marks for persistence!  :thumbup:



 :clap: :clap: :clap: :clap: :clap: :clap: :clap: :clap:

David D.
David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline jemglen

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Re: Threading Die Holder
« Reply #26 on: April 03, 2009, 03:06:38 AM »
Bogs makes a good point when he talks about cutting losses on a job that just refuses to come out of the materials - I know, 'cos I've been there so many times  :( Should you press on, spending more money, time and effort or give in and chalk it up to experience?

Fantastic when it all turns out well, though, and this job has turned out very well indeed!  :) Well done Darren  :ddb:

Jerry

Offline Twinsquirrel

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Re: Threading Die Holder
« Reply #27 on: April 03, 2009, 03:48:20 AM »
Great Darren, A lesson in shear bloody mindedness, at least you know that tool will be completely bomb-proof.

David H
So many ideas, so little skill

Offline Darren

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Re: Threading Die Holder
« Reply #28 on: April 03, 2009, 04:43:38 AM »
Nice one Darren.

But shouldn't it be? - Oh ye of little faith, but whom still have carbide tips, taps, drills and hair still intact.

You really do need to start learning to give up a lot sooner,


Good grief no John,

I've had some valuable lessons whilst making this piece. My confidence and skill level I feel has risen somewhat. Sometimes persistence and perseverance is what takes us all above the level playing field. Otherwise why bother having a workshop at all, or any other taxing hobby. Might as well just sit and watch the telly each night instead.

Regarding the rate of tool demise this is I what I've learnt.

Bandsaw
, use the fiber cutoff saw instead
Lathe insert tips, don't go through them one by one, use a diamond to sharpen just the one for the whole job
Drill bits, Take the top incredibly hard skin off the material before drilling. Use a specialist hard drill bit if need be. I would have taken more off, except I'd drilled some longitudinal holes in the end thereby limiting me a touch.
Taps, same as drill bits, I only broke a tap last night because I should have taken another couple of millimeter off the diameter. Under that it really started to soften up.

I've enjoyed myself over a few evenings, and it's cost me a lot less than a single Saturday night out. (I don't a rule)

Would I do it again, sure, next time would be a lot easier because of my persistence in finding solutions and working around the problems encountered.
If I'd have given up at some point what would I have gained. A few broken tooling and not much else.
If you were to throw me a piece of normal mild steel and say make this, I'd feel a lot more comfortable tackling it now.

Nope, I'm happy with the situation all round  :)
« Last Edit: April 03, 2009, 04:54:39 AM by Darren »
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Offline John Hill

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Re: Threading Die Holder
« Reply #29 on: April 03, 2009, 04:54:24 AM »
Nice work and applause for the perserverence, now on the subject of such devices just how does one use it?

Is it fixed in the tail stock and the lathe spindle turned by hand or do you turn the device after (somehow) locking the lathe spindle?

In any case, how is the die advanced?  Do you have to advance the tail stock to do that or is there some other technique? :scratch:

If/when I make one I will be wanting to know how to use it! :med:
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Offline Darren

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Re: Threading Die Holder
« Reply #30 on: April 03, 2009, 05:02:10 AM »
It's held in this and used under power, doing it by hand is for scaredy cats  :lol: :lol: :lol:



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Offline John Hill

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Re: Threading Die Holder
« Reply #31 on: April 03, 2009, 05:18:15 AM »
Hey! I am not scert o nuffink! :med:

But when using power what happens to the chips in the die?  I dont usually have more than one die of each size on hand.. ::)
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Offline Darren

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Re: Threading Die Holder
« Reply #32 on: April 03, 2009, 07:44:48 AM »
I dont usually have more than one die of each size on hand.. ::)

Not sure I understand you there  :scratch:

The chips should do what they normally do, that is move into the spaces between the cutting area. Some will fall forward, some fill fall back and be pushed into the bored center section behind the die.

I've yet to use it of course, but I believe it will work fine.

You will find it a distinct help… if you know and look as if you know what you are doing. (IRS training manual)

Offline Stilldrillin

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Re: Threading Die Holder
« Reply #33 on: April 03, 2009, 08:10:08 AM »
Would I do it again, sure, next time would be a lot easier because of my persistence in finding solutions and working around the problems encountered.
If I'd have given up at some point what would I have gained. A few broken tooling and not much else.
If you were to throw me a piece of normal mild steel and say make this, I'd feel a lot more comfortable tackling it now.

Nope, I'm happy with the situation all round  :)

Blummin well said Young Man!  :thumbup:

David D

David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Brass_Machine

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Re: Threading Die Holder
« Reply #34 on: April 03, 2009, 12:28:36 PM »
I wanna see it in action! Where is the video??  :poke:

Eric

BTW... Nice job Darren!
Science is fun.

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Offline Darren

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Re: Threading Die Holder
« Reply #35 on: April 03, 2009, 12:43:59 PM »
Thanks for all the kind comments chaps,

It wasn't hard to make at all, the hard bit was figuring out how  :bang:.....enjoyed the learning exercise.  :ddb:

Eric, I'm not sure I'd want to hold a camera, my phone, and operate it at the same time. Could end up with an interesting result !!!  :zap:


Maybe I need to make a phone holder :scratch:
You will find it a distinct help… if you know and look as if you know what you are doing. (IRS training manual)

Offline Brass_Machine

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Re: Threading Die Holder
« Reply #36 on: April 03, 2009, 12:45:40 PM »
...

Eric, I'm not sure I'd want to hold a camera, my phone, and operate it at the same time. Could end up with an interesting result !!!  :zap:


Maybe I need to make a phone holder :scratch:

You need to talk to our man, Ralph... make up a camera mount for the lathe!

 :proj:

Eric
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bogstandard

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Re: Threading Die Holder
« Reply #37 on: April 03, 2009, 01:40:36 PM »
It isn't the camera holding that is the problem, you need swivel eyes to keep one eye on the job and one on the camera.

You need eyes like a chameleon.


Bogs

Offline John Hill

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Re: Threading Die Holder
« Reply #38 on: April 03, 2009, 04:22:44 PM »
Darren, when I last broke a die I was told, in no uncertain terms, that it broke because I did not back off frequently enough to clear the chips!

This is one time when I would like to learn I am wrong! ::)
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bogstandard

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Re: Threading Die Holder
« Reply #39 on: April 03, 2009, 06:04:22 PM »
John,

I very rarely do any hand dieing any more. Just special threads using carbon dies.

If you start with a nice sharp die, workpiece of the correct diameter and the die spread set for the initial cut, plus as long as you have somewhere for the chips to go and plenty of good quality lube, you usually have no problems.

I think the metal reacts in a different way when hand cutting, it has time to harden, so needs to be cleared before cutting the next bit. With power cutting, it is done before it has time to do anything. Also I would never use carbon dies for power cutting, HSS and above only.

I use both the type Darren is making and also a normal die holder for powered cutting. With the die holder, getting it square is the most important part, that is normally taken care of with a machine holder.

I regulary make threaded rod in small sizes (2mm & 3mm) using the hand die method, Cut the first 50mm, then move a bit more out of the chuck, then cut the next bit. It would take you hours if you did it by hand.

All this BTW is done on the slowest speed the lathe will run at.

You can in fact buy die heads (Coventry etc) that hold a range of threading cutters, but are really for production work.

http://www.namco-tooling.com/coventry-dieheads-chasers.html?gclid=CKaa-aDX1ZkCFQiF3god3SEqZw

Just a bit more useless information.

John

Offline Darren

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Re: Threading Die Holder
« Reply #40 on: April 04, 2009, 03:45:35 AM »
I have to agree with John, not that I would dispute his words mind you..... :lol:

I've never had any problems with using the lathe to power the threading action, even with small 3mm taps into sticky brass.

It's when I do it by hand all the fun begins.... :doh:
You will find it a distinct help… if you know and look as if you know what you are doing. (IRS training manual)

bogstandard

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Re: Threading Die Holder
« Reply #41 on: April 04, 2009, 06:57:06 AM »
Darren,

Quote
I have to agree with John, not that I would dispute his words mind you.....

One thing you should never do is take everything I say as gospel. No-one is perfect, and I have made a lot of mistakes in my time, plus my own personal opinions sometimes come into it.
Most times the info I will give will be spot on and in laymans terms, but if in doubt, check it out, and if I am wrong, tell me.

That way we will both have the correct info.

John