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Old 03-13-2017, 09:34 PM
Rufus Rufus is offline
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Default Metal lathe

Hi all:
I was watching a Youtube video on the basics of a metal lathe. I found out that the large, round part that spins is the "head stock" and the other end that remains stationary is called the "tail stock". Now, the problem I have is understanding the diameter. The fella in the video used the 7 by 14 inch hobby lathe for an example. Now, he said that the "center hunt" or swing measurement (in the U.S.) is now called the diameter. When he refers to a 7 by 14 inch hobby lathe, does that mean that the overall all diameter of the round piece of the metal on the lathe 14 inches while from the tip of the head stock down to the bed of the lathe is 7 inches or does he mean that it is 7 inches in diameter but only 3 and a half inches from the center of the head stock to the lathe bed? I would like to learn at least a bit of metal lathe basic so when I come here, I know what is being talked about.

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Tim
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Old 03-13-2017, 09:42 PM
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A 7x14 is 7 equals 7" clearance from the center of the spindle the chuck screws on the the lathe way. The 14 equals 14" distance from the chuck to the tail stock.

Buying a lathe are we?????
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Old 03-13-2017, 09:55 PM
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Originally Posted by milomilo View Post
A 7x14 is 7 equals 7" clearance from the center of the spindle the chuck screws on the the lathe way. The 14 equals 14" distance from the chuck to the tail stock.

Buying a lathe are we?????
No Chris, not buy a lathe just yet I don't understand what you mean when you say " 7" equal 7" clearance from the center of the spindle the chuck screws on the lathe way". I must point out that when you are talking to me about lathes, you are talking to an authentic idiot lol

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Tim
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Old 03-13-2017, 09:57 PM
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And my 12" metal cutting lathe would never be able to handle a 12" piece of solid stock, thus listed capacity is not necessarily tied to actual useful capacity.

I think bigger is better, and heavier is even better yet.
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Old 03-13-2017, 09:45 PM
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As I understand it, this is Depending on the vintage and country of origin:

Lathes are measured by swing and bed length.

Or swing and useable bed length (tailstock takes up room that is deducted to get to useable bed length).

Swing is the diamater of a workpiece that can be turned without hitting the ways.

or swing is the diameter of a workpiece that can be turned without hitting the carriage (portion that rides on the ways and goes up to and along side the chuck.
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Old 03-13-2017, 09:58 PM
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Originally Posted by rock6.3 View Post
As I understand it, this is Depending on the vintage and country of origin:

Lathes are measured by swing and bed length.

Or swing and useable bed length (tailstock takes up room that is deducted to get to useable bed length).

Swing is the diamater of a workpiece that can be turned without hitting the ways.

or swing is the diameter of a workpiece that can be turned without hitting the carriage (portion that rides on the ways and goes up to and along side the chuck.

Ok. Then what are those rail looking things at the bottom of the lathe? Are those the ways?

Thanks
Tim
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Old 03-13-2017, 10:00 PM
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Could someone point me to a diagram of a metal lathe that points out what piece is what?

Thanks
Tim
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Old 03-13-2017, 10:05 PM
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https://engineerharry.wordpress.com/...-of-the-lathe/
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Old 03-13-2017, 10:10 PM
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Thanks Rock

Tim
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Old 03-14-2017, 06:17 AM
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And then there are lathes without any ways....that you can see.

When looking at machinery, don't forget to "look outside the box"

But the terminology will always be the same.
Ways, tailstock, cross slide, tool holders, turning capacity (dia.) and length, etc.
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