Member postings for Dave Harding 1

I had the same issue it turned out that it was not the lathe at all it was a fault with the wiring supplying power from the house to my workshop.

Thanks for the replies.

All the time I have had this lathe and it never dawned on me up till now that the numbers of the change wheels in the top set of figures are for cutting speeds. What a numpty I am.

Ok I will try setting it up as you suggest.

Yes, I still have the same lathe as the one pictured.

I was wanting it set up to turn the outside parallel and hopefully get a better finish. I would face off by hand.

Hi

I have used my lathe before for threading by adding the correct drive wheels and engaging the half nut.

I was wondering if it was possible to fit the drive wheels in such a way to just give you a constant slow feed for facing cuts.

Hope this makes sense.

I give it up as a bad job no matter what speed I run it at the carbides end up glowing red and I struggle to remove any material. I binned it and turned it out of mild steel.

Edited By Dave Harding 1 on 04/08/2019 17:50:28

I have been trying to machine 316 stainless bar stock using carbide tooling.

I don't have any flood cooling it just gets extremely hot and now I think its case hardened itself. My carbide tools are not touching it. I have gone through several carbides I think I need to find another material for my project.

I need something that is strong and fairly hardwearing any ideas.

I took them to work and popped them on the Bridgeport mill a couple of minutes and it was done.

I failed even using carbides to make a dent in it. Its probaly easier to make a tool post holder to accept a 16mm tool.

A job for the weekend.

Another question for you the carbide tool holders that you can buy are they hardened.

Would I be able to mill a 16mm holder down to 12mm to fit in my quick change tool post holders.

Edited By Dave Harding 1 on 15/06/2019 23:56:39

Thanks guys.

There are lots of cheap Chinese carbide inserts offered for sale on the bay etc.

Are they worth buying?

I eventually got the job done using an ISCAR miniature boring bar.

That's an interesting video thanks for sharing.

I double checked and with the help of google determined that they are actually VNMG not VCMT as I thought.

My mistake I ordered the wrong inserts. As I have quite a few of them I decided to buy a suitable tool holder and use them.

Thanks for the feedback.

Hi

I need to machine an internal groove in aluminum. The groove needs to be 10mm wide and 2mm deep. The workpiece is 100mm OD and 87mm ID.

So plenty of room to work. I am struggling to find a tool to do it with.

HELP.

Oops they are VCMT

I purchased some 16mm carbide inserts the hole in the centre is smaller than my current ones I can not get the retaining screw through the hole. I thought they would all be a standard size.

This subject may have been discussed before.

What is the correct way to set up and use a standard spilt die to cut a thread?

In what order do you tighten the three screws.