Pratt Bernerd chuck jaws find on ebay

[old mart]

My old firm had a couple of cnc lathes which had the extra axis, I noticed that the operators usually programmed them, wheras the mills usually relied...

[old mart]

I must admit that that method of refurbishing the chuck had never occurred to me. I think I will keep to the more traditional method of loading the jaws...

[old mart]

I was very lucky, I've just looked up the price I paid for the two sets, it was £25.40 including postage. I stumble over some bargains just by going...

[old mart]

I'm always trawling through ebay in the hope of spotting something and somebody had two sets of PB hard jaws, inside and outside with a low price and...

[old mart]

What I meant when I said measure it was for you to make a drawing with all the measurements so that somebody who is used to finding these codes could...

[old mart]

Users of industrial machines use QCTP's for work efficiency and would laugh at some of the rubbish which HS machinists use. A good quality QCTP would...

[old mart]

I think that the mod will improve any lathe no matter how heavily built it is. So many people go mad with QCTP's and never pause to wonder if the conveniance...

[old mart]

One advantage of threading straight in is being to read the depth of thread as you go relying on thread tables. The trigonometry is then not needed. I...

[old mart]

The rear parting off block/post is much stiffer than using the blades in the ordinary toolpost on the compound.
Now you will have to make two. ...

[old mart]

Lower shims are not common on boring bars as there is not enough thickness of metal below the insert like there would be on a normal turning tool.

[old mart]

You will have to take it off the bar and provide a full set of measurements. I did mention Carbide Depot in post #5, not easy to decipher at first, which...

[old mart]

When the lockdown eases and I can get back to the museum, I will be mounting the four way toolpost that I bought on ebay directly onto the cross slide...

[old mart]

Any thoughts of having some sort of seat in the workshop?

[old mart]

So its CPGT with the 15 degree sides. There are plenty on ebay, in good makes and not all that expensive.
The bar is worth much more as a bar than...

[old mart]

Where I used to live in West Sussex, UK, there was the countries centre for iron working during the middle ages. Iron slag was not hard to find and it...

[old mart]

I deleted them yesterday, and a new one popped up today, and its back to normal.

[old mart]

I have never seen one of these Bison/Toolmex tailstock chucks before today, and another one comes up on ebay UK. It is 125mm with slot and tenon jaws...

[old mart]

A better picture would help, it looks to me like a CCMT which is positive with 7 degree sides. If the bar is good quality, and it very likely is, the...

[old mart]

I could get that undone in minutes, using whichever type of ring (box) fitted best at the time.

[old mart]

That is nice, do you have both sets of jaws? I made one for the lathe with an 80mm three jaw chuck, but haven't had a use for it yet.
The chuck...