Search found 1333 matches

by John Hasler
Thu Jan 23, 2020 3:02 pm
Forum: General Discussion
Topic: First time using super glue chuck
Replies: 33
Views: 1496

Re: First time using super glue chuck

One advantage of the glue is that the layer is very thin and quite rigid. A layer of tape will be slightly flexible and so might cost you a bit of precision.

I'll try the tape-glue-tape system some time. Sounds much more convenient than have to soak or cook the glue off.
by John Hasler
Thu Jan 23, 2020 1:56 pm
Forum: General Discussion
Topic: First time using super glue chuck
Replies: 33
Views: 1496

Re: First time using super glue chuck

Most cyanolacrylates reach well over half their ultimate strenght in 10 minutes. No need to wait 24 hours. They do not release cyanide. Some people are allergic to the fumes but most just find them noxious. I'm allergic to bananas but I don't claim they're toxic. I've used double-sided tape. It work...
by John Hasler
Thu Jan 23, 2020 9:03 am
Forum: Casting & Foundry Work
Topic: Making ZA27
Replies: 4
Views: 90

Re: Making ZA27

I've never done it either but the melting point of copper is above the boiling point of zinc so you certainly don't want to melt the copper first. The melting points of those alloys are a bit below the melting point of zinc so I should think that melting the zinc and dissolving the other metals in i...
by John Hasler
Thu Jan 23, 2020 8:15 am
Forum: Lathes
Topic: grinding carbide inserts
Replies: 16
Views: 454

Re: grinding carbide inserts

Don't know.
by John Hasler
Wed Jan 22, 2020 8:51 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 16
Views: 454

Re: grinding carbide inserts

Goop that stops soldering or brazing metal from sticking.
by John Hasler
Wed Jan 22, 2020 2:38 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 16
Views: 454

Re: grinding carbide inserts

Perhaps coat the carbide with anti-flux?
by John Hasler
Tue Jan 21, 2020 7:01 pm
Forum: General Discussion
Topic: Drilling holes in rocks - Help
Replies: 43
Views: 580

Re: Drilling holes in rocks - Help

I've got a 100' 12 gauge extension cord that works fine. 3 volt drop at 10 amps. You may have branch circuits that long.
by John Hasler
Tue Jan 21, 2020 6:15 pm
Forum: General Discussion
Topic: Internal tapered bore
Replies: 18
Views: 437

Re: Internal tapered bore

Interesting design. Is the casing extracted by pushing it out?
by John Hasler
Tue Jan 21, 2020 3:11 pm
Forum: General Discussion
Topic: Internal tapered bore
Replies: 18
Views: 437

Re: Internal tapered bore

Dave writes: > I wouldn't use a center if only to avoid altering the round. Good point. > Another way that doesn't require trying to match the profile of the end of the bullet > is just to bore a hole in a bar and let it contact the bullet in a ring. Much better than my method. Better yet bore the h...
by John Hasler
Tue Jan 21, 2020 9:25 am
Forum: General Discussion
Topic: Internal tapered bore
Replies: 18
Views: 437

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 ...
by John Hasler
Tue Jan 21, 2020 8:58 am
Forum: General Discussion
Topic: How To Remove Threaded End Of Broken Pipe?
Replies: 6
Views: 141

Re: How To Remove Threaded End Of Broken Pipe?

I've successfuly used easy-outs for that.

What's an internal pipe wrench? Sounds very useful.
by John Hasler
Sat Jan 18, 2020 11:38 am
Forum: General Discussion
Topic: Creating a GROOVE inside a very small TUBE (on the lathe)...
Replies: 9
Views: 328

Re: Creating a GROOVE inside a very small TUBE (on the lathe)...

One way to make such tools is to start with an HSS drill bit.