What can y'all tell me about a pratt and whitney model b 12x30. Are they easy to brake or damage, repair get parts and tooling for etc?
Pratt and Whitney Model B 12x30 Lathe any good?
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N2 Welding
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That sounds about right. Thank you.
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I forgot to mention we did not load it onto the trailer with it bolted down to the 4x4’s. I did that before I unloaded it after seeing a picture of some guys loading a lathe bolted to some 4x4’s so it’s like a sled. Made it so much easier to unload and get rotated into position. When loading it while it was about halfway on and halfway off the trailer it tipped over sideways and for some reason it did not go all the way over and no visible physical damage occurred. It did leak a lot of oil out though. I don’t know if it it got tweeked somehow though. The slides seem to still be tight and slide pretty good. So with any luck it was not damaged.
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I hope you got some of the Aloris tool post tool holders with it they are expensive, you will need to have a few for different tools. If not there are cheaper imitations with holder included for the price of one Aloris tool holder.
http://www.cdcotools.com/
http://www.cdcotools.com/
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It did come with some. I have yet to get all the tooling sorted out and understanding what goes with what. Think I’ll put most of the tooling in my late brothers toolbox. It seems fitting since he was a machinist.
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Have you started leveling it? If you don't have a STARRETT lathe level, I would use a transit or theodolite if you've got one. Start with aligning the vertical line of the reticle to a plumbob then use horizontal line to level the wheys. Whey spell?
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I just finished watching a couple more of his videos. I’m subscribed to him, A-Bomb, This Old Tony, Ace and several others but unchecked the notification bell.
this one gave me a quick down and dirty way to center stock into a 4 jaw. It has a smaller 3 jaw on it now and it came with a larger back plate and larger 4 jaw.
https://m.youtube.com/watch?v=zlUx8TrDHTU
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I have not even started thinking about how I’ll level it out yet. I’m still trying to figure out the distance I’ll need to position it from the wall behind it to make accessing the back side opposite of the operator station side for maintenance or setting up the machine. I’m not even crawling yet lol. One day at a time.
A lot of the tooling will need to be cleaned up as well because it has been sitting for several years idle. So it has some surface rust oil dirt metal shavings etc.
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I like mineral spirits for cleaning that gunk. Theres probly other stuff that works but mineral spirits works better than kerosene or thinner for me.
Nice score.
Nice score.
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How to properly level the lathe (and why) is described in the SB booklets I linked to.
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Just finished going through the tool holders and it came with an Aloris AXA quick change post but no tool holders and the bottom of the Aloris T nut is to small for the cross slide tool rest thing. :/ Major bummer dude
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A word of warning, and keep it in the back of your mind when running this thing.
This is a powerful machine, and will be absolutely unforgiving when you crash it, and crash it you will. Not saying it's a bad thing, but just saying it will happen.
Smaller, less powerful, machines have a bit of safety factor. Belts slip, drive pins shear, etc.................... This is a very solid machine that will just keep on going. Be aware at all times of how to shut it down in a hurry.
Be especially careful when it comes to tool overhang, and part overhang. It doesn't take but a second for a workpiece to climb over the tool, and come after you.
Don't mess with files,, or abrasive paper, until you're absolutely confident that you're keeping clear of the chuck, and know how to hold the strip of paper properly.
Be aware of chatter...........it's often a warning that you're pushing too hard, or the workpiece isn't being held securely. Always use a live center in the tailstock when possible.
Eye protection is mandatory. A lathe will throw chips with a lot of force, and they're very hot when taking heavy cuts.
Short sleeves, and no loose clothing.
Check all powerfeed settings before starting a cut. Direction of feed, cross slide vs. longitudinal feed, etc. Keep your hand on the clutch lever while turning at the beginning.....you can let that go when you get used to the machine.........this is your safety device.
I like to think of a lathe as a Freedom Machine. It allows you to escape a lot of constraints when it comes to fabrication, or machine repair.
This is a powerful machine, and will be absolutely unforgiving when you crash it, and crash it you will. Not saying it's a bad thing, but just saying it will happen.
Smaller, less powerful, machines have a bit of safety factor. Belts slip, drive pins shear, etc.................... This is a very solid machine that will just keep on going. Be aware at all times of how to shut it down in a hurry.
Be especially careful when it comes to tool overhang, and part overhang. It doesn't take but a second for a workpiece to climb over the tool, and come after you.
Don't mess with files,, or abrasive paper, until you're absolutely confident that you're keeping clear of the chuck, and know how to hold the strip of paper properly.
Be aware of chatter...........it's often a warning that you're pushing too hard, or the workpiece isn't being held securely. Always use a live center in the tailstock when possible.
Eye protection is mandatory. A lathe will throw chips with a lot of force, and they're very hot when taking heavy cuts.
Short sleeves, and no loose clothing.
Check all powerfeed settings before starting a cut. Direction of feed, cross slide vs. longitudinal feed, etc. Keep your hand on the clutch lever while turning at the beginning.....you can let that go when you get used to the machine.........this is your safety device.
I like to think of a lathe as a Freedom Machine. It allows you to escape a lot of constraints when it comes to fabrication, or machine repair.
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This View attachment 20230604_191111.jpg
And a couple other things.
View attachment 20230604_191149.jpg View attachment 20230604_001418.jpg
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Yep, that's a "live center". The other common type of center is a "dead center". The difference being that a live center spins on bearings, and a dead center is the same thing MINUS the bearings. Just a solid lump of metal with a point on it.
DEFINITELY heed Sam's warning.
A lathe is a VERY powerful and capable machine.
I do not recommend looking up "lathe accident" or anything like that if you have a weak stomach.
DO NOT wear gloves, baggy clothing, ties (hopefully that ones obvious...), etc. Also, tuck your shirt in and/or wear a shop apron.
Serious about the glove thing, too. The ONLY gloves I think are acceptable to wear around a running lathe would be thin nitrile.
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Oh, and apparently, that tapping head is full of a light machine oil. Might be messy if you open it up. Should have a stack of clutch discs and some way of adjusting tension them for different size taps.
I couldn't find much when I looked it up... I can ask about it on Practical Machinist if you want.
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I couldn't find much when I looked it up... I can ask about it on Practical Machinist if you want.
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Yep, saw a guy in one shop get a sweat jacket get ripped off, lucky for him he could shed it, In another shop saw a girl (very capable machinist) get a hunk of long red hair torn out by a lead screw. She was just looking at another guys work or would have had the hair tied up. It happens fast when it happens.
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I saw about a 30 second video (that I wish I hadn't seen) of a guy getting sucked into a large lathe. Not going to get into details, but I'll say this - it was extremely gruesome.
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Anyway, congrats on the new lathe, N2! 
I hope the stories and warnings don't put you off using it...
I mean... I've heard all kinds of horror stories about chainsaws, guns, cars, motorcycles, boats, etc. and I still think they're all fun to use.
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I hope the stories and warnings don't put you off using it...
I mean... I've heard all kinds of horror stories about chainsaws, guns, cars, motorcycles, boats, etc. and I still think they're all fun to use.
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Pretty sure I saw that one too. Ughh
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