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Todays Project - What did you do today? - Printable Version

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RE: Todays Project - What did you do today? - aRM - 12-24-2016

Hi Guys
Guess most of U will be getting ready for Festivities for which we can take the occasion to wish U and Your Families all the best.
Most of U may be aware of my purchase of this Walter Milling Cutter, Hogger - I call it, quite a while ago.
Due it having a 25 mm Shank, I was advised at that time to turn the Diameter down to my required 19-20 mm's. To get that done correctly, we had mutually agreed that it would obviously have to be done on a Four Jaw Chuck.
Well we tried that month's ago and it literally drove us nuts as we just could not get that right. If it clocked perfect at the Jaw end then the Tailstock reading was cockeyed. If the Tailstock end was rectified then the reading at the Jaw end was off-beat. Bash  Bash  Bash
It was crazy.  We even argued with the Supplier thinking that he let us have a reject part which we got off Flea Bay.
Cut a long story short, we tried again yesterday and battled for another hour or two, getting the readings close, but not perfect to our satisfaction. Even the Wife suggested we just leave the problem alone for a while, as we were getting no where with this.  
It then dawned on me today that seeing this is a Three Insert Holder and a Four Jaw is never going to grasp the front face evenly, why not try the Three Jaw Chuck.
And voila, it worked like a charm.   Big Grin  Big Grin
As a precaution we did clock both ends and the readings were a couple Hundredth of a Millimetre off.  That was more than ample enough accuracy for this sort of a cutter.
Although it has a hardened shank, Turning the interrupted cuts ( Weldon Shank) was a breeze.  Methinks we achieved a fairly decent finish.
We ran the cutter on the Mill just to eyeball concentricity, and she ran flawless.   Thumbsup
Lesson for the day, the FOUR JAW is NOT always right for the Job - as it's made out to be.
Guess most of You Guru's will disagree, but for now, I know from experience.
Like always, there's no good story ending without pics. Well we have attached lots to eyeball.  We reckon we can live with the Chuck Jaw markings on the Cutter Face, which we will try and avoid, next time - LORD Willing.
Thanks for reading, if U got thus far  Blush
Stay safe and Take Care
aRM  
 
[attachment=14006][attachment=14007][attachment=14008][attachment=14009]

RE: Todays Project - What did you do today? - Mayhem - 12-24-2016

As long as you got the desired results that is all that matters. There are many ways to kill a cat, as they say. Personally, I would have turned a concentric sleeve and then slit it lengthways. This would enable you to hold it in the four jaw chuck and dial it perfectly.

Merry christmas to you and yours.

RE: Todays Project - What did you do today? - awemawson - 12-24-2016

Why could you not have turned it between centres? The business end certainly has a centre hole, and I'd be very surprised if the shank end hasn't - that way you would have got the same degree of concentricity that the maker built into it in the first place.

.... puzzled ....

RE: Todays Project - What did you do today? - aRM - 12-24-2016

(12-24-2016, 06:55 AM)Mayhem Wrote: As long as you got the desired results that is all that matters.  There are many ways to kill a cat, as they say.  Personally, I would have turned a concentric sleeve and then slit it lengthways.  This would enable you to hold it in the four jaw chuck and dial it perfectly.

Merry christmas to you and yours.

Hello Darren
Now that U mention it, I was thinking of a sleeve/collar, but only for the rear-end where the Weldon Flats were situated. Did not go a little further and think like U did, which would have been another perfect way to solve this problem.
There is always something to learn from a discussion and I thank U for taking time to respond with such a good idea. I am sure it will come in handy some day.
Merry Christmas to You and the Family
aRM

RE: Todays Project - What did you do today? - aRM - 12-24-2016

(12-24-2016, 07:38 AM)awemawson Wrote: Why could you not have turned it between centres? The business end certainly has a centre hole, and I'd be very surprised if the shank end hasn't - that way you would have got the same degree of concentricity that the maker built into it in the first place.

.... puzzled ....

Sir Andrew Mawson (Esq)
Awe shucks man, now U go and ruin the Friendship and make me feel like crying Bawling
U one awesome Manson, Sir.....a real * !!! Worthy
Yes, there was a centre hole at the Shank end which did assist me get a truer reading, even in the Three jaw.
Your idea is "simply" brilliant. Definitely one of those....."now why did I not think of that" which would have saved me hours and hours of brain wracking - all for nothing.
Oh, well. I should have asked earlier, but was too shy to.
We don't ever stop learning.
Next time will look more carefully and study the part thoroughly
Thank You kindly for showing us the correct way
We are indeed grateful.
LORD Bless
aRM

RE: Todays Project - What did you do today? - Mayhem - 12-24-2016

Thanks Andrew, I wasn't aware that the one piece milling cutters had centre holes in both ends. Although, going back to the OP I can see the one in the head. I obviously need to pay more attention Slaphead

I think Ken had posted somewhere on here the three that he did for someone. I'd go searching but...

RE: Todays Project - What did you do today? - pepi - 12-25-2016

(12-23-2016, 08:44 AM)TomG Wrote:
(12-21-2016, 10:20 PM)pepi Wrote: A question, other than the expense & holding power of a 6 jaw chuck are there other advantages to know about?

Greg

Greg,

Not sure I'd include expense as an advantage, but six jaws does offer a number of benefits over three. Probably the biggest is concentricity. When you chuck a machined cylinder, it run much more true than in a three jaw chuck, axially and radially. Another advantage is that since there are twice as many jaws, they put half as much force on the part. That makes for fewer marks and less distortion, especially on thin wall parts. I've also seen (and witnessed Blush ) parts "cam out" of three jaw chucks, and that can't happen on a six jaw.

Tom

Tom,

I was just being funny about the expense. Thanks for pointing out the other advantages.   With a short amount of hands on I have working with my lathe. I've experienced the "cam out" did not know it had a name. But did solve it  using a steady, the part was big enough for it to be used.

So thanks, you are now going to be responsible for causing me to spend a grand, in the near future.. Big Grin


Greg

RE: Todays Project - What did you do today? - RobWilson - 12-27-2016

Evening Chaps, Big Grin

Thought I would remodel the shop today, and join shop 1 to shop 2 as I was getting sick of walking back and forth between the two and also heating two shops is a pain.

So the join will be here on this side, the milling cutter wall cabinet will need relocating doh!

[Image: P1140372_zpsbxoqwfvq.jpg]

And all this will need moving on the other side, and one of the new wall cabinets will also need relocating  Doh!

[Image: P1140375_zpshdbgzhbv.jpg]

Crap moved and two sections of concrete panel removed.

[Image: P1140378_zpstj153ldd.jpg]

Next, the brickwork was removed.

[Image: P1140382_zpsxtdz6axx.jpg]
[Image: P1140383_zpsm0rnousn.jpg]

The old doorway into shop 1 will be bricked up later in the year.  So tomorrow I will need to clean the brickwork up and brick up the gap between the two shops.



Cheers Rob Smiley-eatdrink004

RE: Todays Project - What did you do today? - EdK - 12-27-2016

Wow! That's a lot of work but in the end it'll be much nicer having the two shops joined.

Ed

RE: Todays Project - What did you do today? - Mayhem - 12-27-2016

Where are the pictures of you swinging the BFH Rob? Big Grin

I can appreciate the need not to walk outside. My memory of growing up in the UK was that it rained nine moths of the year.

p.s. I like the corner storage unit in your welding shop. Looks very flash!