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Author Topic: 24 inch Engine Lathe in 1/16 (Finished!)  (Read 45468 times)
Ray Dunakin
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« Reply #45 on: September 03, 2012, 11:12:57 PM »

Looking good!
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Chuck Doan
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« Reply #46 on: September 04, 2012, 08:21:31 AM »

Yes it is!
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lab-dad
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« Reply #47 on: September 10, 2012, 04:48:23 PM »

Tool holder and apron finished, sort of.
Still need the lever and handwheels.
FWIW the tool holder works as the real deal as do the pivot/angle adjuster and the tool feed/adjust.
I may increase the size of some of the hardware.
-Marty

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TRAINS1941
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« Reply #48 on: September 10, 2012, 09:01:40 PM »

If that doesn't look like the real thing I don't know what does.

And moving parts no less.

Jerry
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« Reply #49 on: September 19, 2012, 10:19:21 AM »

Nice work Marty.  Being an owner of an old 24" belt slapper at one time I can say everything looks about right.   Nice Job on the back gears.

Here's a story about a small lathe built by prisoners in a Japanese prison during WWII.  And modern prisoners think they are so innovative making shanks out of steel chunks and tattoo machines out of tape recorders.

http://machineshop.olin.edu/resources/documents/Prison%20Camp%20Lathe.pdf
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Russ
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lab-dad
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« Reply #50 on: September 19, 2012, 01:08:17 PM »

Thanks Russ.
Great story, thoroughly enjoyed it!
Brought back memories of "Hogan's Hero's"
-Marty
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SandiaPaul
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« Reply #51 on: September 19, 2012, 07:28:40 PM »

May I make a suggestion?  The rocker under your tool bit is too large, I mean too tall.
Take a look at pictures or instruction books and see how tall they are, they are usually only a small "boat" shape. See some examples here:

https://www.google.com/search?hl=en&tok=ig1MW18bofoQcoTe09L4zA&ds=bo&pq=machinst&cp=18&gs_id=1ud&xhr=t&q=how+to+run+a+lathe&safe=off&um=1&bav=on.2,or.r_gc.r_pw.r_qf.&biw=1454&bih=774&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=HnBaUM6WOuPu0gGgxoHACA#um=1&hl=en&safe=off&tbm=isch&sa=1&q=lantern+tool+post+holder&oq=lantern+tool+post&gs_l=img.1.1.0i24l2.28760.33094.2.35938.17.12.0.5.5.0.159.1114.8j4.12.0...0.0...1c.1.T9gbLK9Pspc&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=d8712af1ae4bb980&biw=1454&bih=774

If you search I'm sure you will find a prototype for a tall one but its certainty not common. Too a machinist it looks odd.

I say this from many years of exposure to machine tools and direct experience with these (awful) types of tool posts.  In fact they do have their advantages, but are generally hard to use and not all that rigid.

I make it a habit to not criticize(maybe that makes me an odd ball on this forum Wink? ) But this just sticks out like a sore thumb to me.

All else is fantastic...I'd like to see a whole shop!

Paul
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Paul
lab-dad
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« Reply #52 on: September 20, 2012, 05:53:16 AM »

Paul,
First off Thanks!
And your absolutely correct.
It has bothered me since I made it. I think I will relegate this one to a parting tool of sorts, or a larger cutter!
I will get to making some new ones soon (need more .156" rod)
Thank you for being honest!

Better?


The "whole shop" is planned, now if I just live that long!
-Marty
« Last Edit: September 20, 2012, 07:22:10 PM by lab-dad » Logged

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michael mott
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« Reply #53 on: October 02, 2012, 12:20:16 PM »

Very Nice Marty.
Michael
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SandiaPaul
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« Reply #54 on: October 02, 2012, 06:02:27 PM »

Marty,

Yes Marty...but can I nitpick more? ;0

This is one area I know something about so...here goes:

1. The ring under the "boat" shape should be dished down to fit the bottom of the boat shape, in reality it is a spherical shape but for the model I think a gentle angle would look good.

2. The bolt to tighten the tool should have a square head as should the wrench of course.  Square headed bolts were very commonly used back then, and even how the lantern tool post uses a square head bolt.

Minor details I know, but you are working at such a large scale that they will be noticeable(to me anyway!)

Thanks for your indulgence,

Paul
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Paul
michael mott
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« Reply #55 on: October 02, 2012, 07:33:33 PM »

Paul your observations are spot on, even the Southbend that I used at the university had the conditions you note, as does the Myford that I have now. with respect to the toolpost.
This is the wonderful thing about this site, the level of observation and great critical input to improve the level of the models, is the best on the web.

Michael
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lab-dad
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« Reply #56 on: October 03, 2012, 06:02:38 AM »

Damn,
I was hoping you wouldn't catch me on those two points!
Your right, I actually have thought about both items but thought I would try and get away with it! Undecided Undecided Undecided
I will fix them, and THANKS for nitpicking!

-Marty
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Barney
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« Reply #57 on: October 03, 2012, 07:26:15 AM »

Blow your mind and go wild young man its looking good - this big stuff is pretty addictive
Barney
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lab-dad
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« Reply #58 on: October 07, 2012, 11:20:44 AM »

Well the construction phase is complete!
Thanks to "Mr. Potato Head" I was able to make a 4-Jaw chuck!! Thanks Gil!!
-Unless Paul catches any more of my mistakes!
(I'm beginning to hate square fasteners!)

Seriously though, speak now or forever hold your tongue!







Now all I have to do is;
take it apart.
Paint it
put it back together
some chips, stains and swarf
And build a building to put it all in!

I had the three machines out and together, can not wait for the lathe to be painted and take a "family photo"!

-Marty
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finescalerr
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« Reply #59 on: October 07, 2012, 02:10:39 PM »

Not too bad. -- Russ
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