Lathe not turning properly

[Wizard69]

Cheers Phil. I guess being selective on when to use parting is the way I should go.

Ben Thm:

It will grow on you with experience. Once you zero in on the right grind for the tool and the right speed you will find that parting off is very useful as long as you work within the limitations of the machine.

 

[goldstar31]

Ben,
If you recall, I suggested that you might benefit from going to the London Show at the Ally Pally.

Clearly you are now experiencing problems with parting off. Might I suggest that you read/borrow or steal either a copy of Model Engineer Volume 142 or George Thomas's Model Engineer's Workshop Manual? You could get a copy at the show. The latter contains how GHT developed a small rear parting tool and, importantly, how to make it- on a lathe. I made mine up many years ago and it has worked faithfully over many lathes. Currently, it is on a Myford Super7B which I restored some few years ago.
There is a kit of parts available from Hemmingway kits but it can be constructed from bits and pieces- and works just as well. Our old friend Dr Bill Bennett edited the posthumous writings of GHT into two books. They contain much information which is suitable for both beginner and the bit more experienced- but still learning- like me.

Norman

In a break before going to hospital, might I suggest that you Google the old Chris Heapy site. Again, there is lots of information- and this also recommends the GHT book etc

 

[benjames]

Ben,
If you recall, I suggested that you might benefit from going to the London Show at the Ally Pally.

Clearly you are now experiencing problems with parting off. Might I suggest that you read/borrow or steal either a copy of Model Engineer Volume 142 or George Thomas's Model Engineer's Workshop Manual? You could get a copy at the show. The latter contains how GHT developed a small rear parting tool and, importantly, how to make it- on a lathe. I made mine up many years ago and it has worked faithfully over many lathes. Currently, it is on a Myford Super7B which I restored some few years ago.
There is a kit of parts available from Hemmingway kits but it can be constructed from bits and pieces- and works just as well. Our old friend Dr Bill Bennett edited the posthumous writings of GHT into two books. They contain much information which is suitable for both beginner and the bit more experienced- but still learning- like me.

Norman

In a break before going to hospital, might I suggest that you Google the old Chris Heapy site. Again, there is lots of information- and this also recommends the GHT book etc

Hello Norman,

I got myself a copy of George Thomas's Model Engineer's Workshop Manual and will have a look at the parting tool holder when I get a moment. Thanks for the heads up.

Ben.

 

[mikbul]

I was turning my first piece of metal, trying to part a piece of the end of a long bar when the metal just stopped turning. I am thinking that maybe I advanced the tool too far and it jammed.

The motor was still heard to be running and now when I try and start the lathe it turns for a second or two and then stops and just makes a clicking noise.

Can someone shed some light on what has happened? I tried turning by hand to see if everything went back into place but it seems that I get one hard to turn revolution for every two or three easy to turn revolutions.

I have posted a short video of the problem on youtube:

http://www.youtube.com/watch?v=GvFT6tPMsNI&feature=youtu.be

Any ideas?

Ben.

I find it easier on the lathe and safer to start the cut with the parting tool then clamp it in the horizontal band saw. Then I come back and face it.