Author Topic: Kozo Pennsylvania A3 0-4-0  (Read 671 times)

Offline esaresky

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Re: Kozo Pennsylvania A3 0-4-0
« Reply #15 on: January 18, 2023, 02:50:58 AM »
I switched to the LeBlond to make the wheels for a few reason. One reason was the chatter I was getting with the Hardinge once the round nose tool was 60 thousands in depth (not all at once but on the third .015Ē cut). Iíve had that lathe for just two years but havenít had any chatter issue. Iíve determined itís coming from the turret to cross slide mount. I knew I would have to use the LeBlond to cut the 3 degree taper on the wheels as thereís no compound on a Hardinge turret lathe.

Offline esaresky

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Re: Kozo Pennsylvania A3 0-4-0
« Reply #16 on: January 24, 2023, 01:49:46 PM »
I was able to spare some time and work on the wheels. They are all at the stage of turning the flange and thread. I machined the mandrel to hold the wheels, I even single-pointed the thread for the nut to keep it all as concentric as possible. I did all the steps to just one wheel because of the 8 wheels, 7 have a axle bore of .3135Ē-314Ē (I was using a 5/16Ē reamer too) but one wheel is .318Ē. Donít know what happened but Iíll go with it. One axle will just have to be a custom fit. So I did all the final steps to the .318Ē wheel and then I turned the mandrels shoulder to .313Ē for the rest of the wheels.


Offline vtsteam

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Re: Kozo Pennsylvania A3 0-4-0
« Reply #17 on: January 24, 2023, 02:14:19 PM »
Them's purty!  :Love:

Funny how tools sometimes decide to expand, and then change their mind and go back when you put a mic to them. I've had that happen many times!  :thinking:

Looking good!  :ThumbsUp: :popcorn: :cheers:
Steve

Offline esaresky

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Re: Kozo Pennsylvania A3 0-4-0
« Reply #18 on: January 24, 2023, 02:29:05 PM »
Them's purty!  :Love:

Funny how tools sometimes decide to expand, and then change their mind and go back when you put a mic to them. I've had that happen many times!  :thinking:

Looking good!  :ThumbsUp: :popcorn: :cheers:

 :Lol: :Lol:

Offline cnr6400

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Re: Kozo Pennsylvania A3 0-4-0
« Reply #19 on: January 24, 2023, 05:01:45 PM »
I've got some reamers that change their mind too. One drill chip left in the wrong spot and bingo! .005" over.

Very similar to the situation if I drop a potato chip in the kitchen, and don't notice it. My wife steps on it, and bingo! life as we know it is over for the day!   :slap:  :Lol: (just kidding - she's wonderful!  :Love:)
"I've cut that stock three times, and it's still too short!"

Online Kim

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Re: Kozo Pennsylvania A3 0-4-0
« Reply #20 on: January 24, 2023, 11:25:45 PM »
Great looking tender wheels!    :ThumbsUp: :popcorn:

Doing things eight times gets a little tedious, doesn't it? I don't know how people doing these 8 or even 12-cylinder engines do it!  So much repetition!  :o

But there are only a few parts that you have to do eight times.  Then you get into the 4x and 2x parts with the trucks and springs.  It gets more manageable :)

Kim

Offline esaresky

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Re: Kozo Pennsylvania A3 0-4-0
« Reply #21 on: January 25, 2023, 12:41:07 AM »
Great looking tender wheels!    :ThumbsUp: :popcorn:

Doing things eight times gets a little tedious, doesn't it? I don't know how people doing these 8 or even 12-cylinder engines do it!  So much repetition!  :o

But there are only a few parts that you have to do eight times.  Then you get into the 4x and 2x parts with the trucks and springs.  It gets more manageable :)

Kim

Iím use to it. When I worked at the machine shop, it was small runs but still, doing a few dozen of the same item with manual machines. Ugh. He didnít even have a turret lathe. I would have loved having my Hardinge chucker when I worked there.  :facepalm:

 

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