Search found 949 matches

by liveaboard
Sat Jan 25, 2020 2:01 pm
Forum: Lathes
Topic: Change lead screw to metric?
Replies: 8
Views: 132

Re: Change lead screw to metric?

My leadscrew is 1"x36", + a few for the bushings. Thinking about it, turning the screw around doesn't really make sense; sometimes I thread things right at the end [anyway, I did that once]. If I'm going to get into it and do the work, I might as well do the work. Anyway, the nut is the expensive pa...
by liveaboard
Fri Jan 24, 2020 7:13 pm
Forum: Lathes
Topic: Change lead screw to metric?
Replies: 8
Views: 132

Re: Change lead screw to metric?

I do a fair amount of single point threading but all rough work; Almost all metric. I'm not making supper fine or super accurate things. Nothing else on this lathe is quite accurate either... My half nut threads look like round knives and the lead screw threads are thin and rounded at the area that ...
by liveaboard
Fri Jan 24, 2020 2:04 pm
Forum: General Discussion
Topic: Removing End Of Broken Pipe From Pressure Pot Manifold
Replies: 13
Views: 205

Re: Removing End Of Broken Pipe From Pressure Pot Manifold

Stick weld on the inside; messy, smoky, ugly, HOT, it will work.
fast.
by liveaboard
Fri Jan 24, 2020 9:28 am
Forum: General Discussion
Topic: Removing End Of Broken Pipe From Pressure Pot Manifold
Replies: 13
Views: 205

Re: Removing End Of Broken Pipe From Pressure Pot Manifold

You'll burn the paint for sure before it gets hot enough in there where the threads are. I would turn a piece of steel rod so it could be slid in and then welded to the inside of the broken part. Then be prepared to apply torque and remove it while it's still hot. Or; weld around a little on the ins...
by liveaboard
Fri Jan 24, 2020 7:13 am
Forum: Lathes
Topic: Change lead screw to metric?
Replies: 8
Views: 132

Change lead screw to metric?

My lead screw and half nuts are pretty bad. The old screw is acme 6tpi, although the rest of the lathe is metric. Except the tailstock screw. Anyway, a new acme lead screw + nut costs around $500, but a metric 5mm trapezoidal screw + nut only costs around $100. So it comes down to the change gears I...
by liveaboard
Thu Jan 23, 2020 8:40 am
Forum: General Discussion
Topic: Installing thread inserts
Replies: 18
Views: 502

Re: Installing thread inserts

I like helicoils but they're very expensive. I just bought a noname helicoil-like set. Looks good but haven't used it yet. it was about 1/4 the cost of a helicoil brand set. Helicoils are stronger than the original thread, and the hard plating makes them resistant to tearing. The load is spread over...
by liveaboard
Wed Jan 22, 2020 7:15 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 16
Views: 471

Re: grinding carbide inserts

That's sounds like a great idea!
What's anti-flux?
by liveaboard
Wed Jan 22, 2020 4:53 pm
Forum: General Discussion
Topic: Drilling holes in rocks - Help
Replies: 43
Views: 603

Re: Drilling holes in rocks - Help

Cartridges were expensive; the nails too. I used to look out for used ones and got a stack of someone's old leftover cartridges but had to but the nails new. 80 cents to a dollar a shot as I recall; not so cheap. But the alternatives for attaching the interior wood to the steel beams of my boats wer...
by liveaboard
Wed Jan 22, 2020 2:15 pm
Forum: General Discussion
Topic: Drilling holes in rocks - Help
Replies: 43
Views: 603

Re: Drilling holes in rocks - Help

I have an old Hilt cartridge hammer; put hundreds of nails through 2" of wood and 1/4" of steel.
works fast, holds fast.
by liveaboard
Wed Jan 22, 2020 2:12 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 16
Views: 471

Re: grinding carbide inserts

I tried not brazing coated inserts to toolholders I made. It worked, but not as well as hoped; the braze did wet the carbide in some spots and they broke coming out. I chipped off the carbide bits but there was some damage. After some filing, the inserts fit ok, but not perfectly. DSCN2471.jpg DSCN2...
by liveaboard
Wed Jan 22, 2020 5:01 am
Forum: General Discussion
Topic: Drilling holes in rocks - Help
Replies: 43
Views: 603

Re: Drilling holes in rocks - Help

Hilti is the Rolls Royce of handheld power tools; top quality and topper price. Some years ago I had a lump of concrete I needed to drill, and since I never worked with masonry at that time I borrowed a Hilti hammer drill from my neighbor. who did that sort of thing for a living It broke. Etiquette ...
by liveaboard
Tue Jan 21, 2020 6:03 am
Forum: General Discussion
Topic: Internal tapered bore
Replies: 18
Views: 453

Re: Internal tapered bore

Mount a cartridge on the lathe, centered between 2 formed rods [drill a hole to hold the nose and round off another rod to fit into the indentation at the rear]. Then put a dial indicator on the top slide and run it up and down the tapered side of the shell, adjust the angle until it's right. Then y...