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Member postings for ross keeling

Here is a list of all the postings ross keeling has made in our forums. Click on a thread name to jump to the thread.

Thread: Colchester student run out
14/08/2012 19:47:50

On the student the chuck speeds are colour coded and the red setting I was using was 410 rpm.

I have never had any tuition on a lathe so I am learning each time I use the machine! I think a few hours on google will help.

The lathe is level as I did this job myself and I think adjustment of the tail stock and turning a few test pieces will be a good start.

12/08/2012 17:48:41

I have gone to a bit of expense and had my square head Student lathe fitted with a new chuck, new DRO and give the machine a basic going over.

Yesterday I had to turn a new shaft 8" long for a set of pedals (I work on vintage cars) and it had about a 20 thou run out once machined from chuck (normal jaws) to tail stock.

The material was a piece of 1" EN8 and turned at 420 or 440 rpm (red setting) down to 7/8" and was 20 thou out, I then run the machine at around 550 rpm the next speed up and it took about another 2 thou off. The bar was supported with a tail stock steady.

My question is can the bed be worn to that amount or could some thing be slightly out of alignment?

Any pointers would be really help full.

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