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kellswaterri:





. Maybe that big old mill should be tapped with a sledge, or if they will, crane it up and drop it, then gather up all the wonderful big bits that break off.



John
[/quote]

Hi john...just exactly what I am going to do with the Chester Conquest mill when I obtain my new mill ;D
All the best,
                John.

Darren:
Ha, just what my mill needs, similar to an Eagle 30

A half decent pillar drill it may be, a miller it's not !!



Darren

bogstandard:
Darren,

Usually the topslide and crosslide use left hand threads, so you would need to take them out to check. Also you would need to find the pitch, otherwise your handle scales wouldn't tally to the movement obtained.

You can usually get away with just replacing the nuts.

The nuts are usually made of bronze, to take the continual stresses and wear. I have made these myself for my old Atlas lathe, but usually I make a slight modification to adjust out the wear, and it doubles the life of the leadscrew nut, but it depends if you have a little room spare around it. If there is enough meat on the old ones, you might be able to do the dead easy mod,  and it would keep you going for a couple of years. I have a couple of acme taps, you would need to find out the correct size.

With regards to coolant, I used these on my old lathe and mill, and are about the cheapest you will find anywhere.

http://www.axminster.co.uk/sessionID/QOL/recno/1/product-Axminster-Coolant-System-21084.htm

They do extend tool life considerably, plus also the workpiece doesn't heat up as much and change properties half way thru machining. But goggles and apron are a neccessity, otherwise you will get rather wet, unless you fit splash guards. It is a basic system, but works well.

BTW, the mill drill that you have is what I had been using for the last ever so many years until I just upgraded. I managed to make a few nice pieces on mine, and never gave any trouble at all. It coped with everything, including this chopper frame in for modification.



Problems are usually in the mind, not with the machine.

John

Darren:
That's a very tidy clean workshop you have there John, hope you never visit mine  :bugeye:

To be fair I shouldn't have written that post on my miller. In all fairness it's been badly abused. It is difficult to slide the tables and one of them has a crack.

I bought it off Ebay unseen described as "perfect working condition" Two hand weels were broken and as mentioned the side problem.
Live and learn.....


The leadscrew on my lathe is 3/8 10tpi clockwise thread. I have inc a pic and hopefully you'll be able to see just how worn it is.
When winding the crosslide out it's silky smooth, but going in sticks at one point in every revolution.  This transfers marks to the work.
The slide on it's own is smooth.

It's not a huge problem, but I can fit a new leadscrew at reasonable cost it has to be worth doing.
I have not stripped the compound slide yet, it works fine, I believe it uses the same acme screw but I'd have to check.



Regards
Darren

Darren:
And pics of the two parts turned yesterday





Well that's another project that needs finishing !!

Darren

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