Search found 617 matches

by John Hasler
Wed Apr 18, 2018 2:22 pm
Forum: General Discussion
Topic: grinding a three jaw chuck
Replies: 28
Views: 515

Re: grinding a three jaw chuck

IMHO only the Haas design and the ring and pins design can produce a purely radial load. I lke that Haas design. You could drill extra holes to allow a single plate to cover a wide range, and the plate is simple enough that it would be easy to make extra plates for more range. The grippers could be ...
by John Hasler
Mon Apr 16, 2018 1:55 pm
Forum: Lathes
Topic: Need a way to turn a 30 tpi screw.
Replies: 89
Views: 2799

Re: Need a way to turn a 30 tpi screw.

Ok. This thread has gone on long enough and wandered enough that I can no longer resist the urge to offer an answer to the question in the title.

A screwdriver.
by John Hasler
Mon Apr 16, 2018 11:30 am
Forum: General Discussion
Topic: grinding a three jaw chuck
Replies: 28
Views: 515

Re: grinding a three jaw chuck

Rear support may also cock the fronts of the jaws inward slightly.
by John Hasler
Sun Apr 15, 2018 4:39 pm
Forum: General Discussion
Topic: grinding a three jaw chuck
Replies: 28
Views: 515

Re: grinding a three jaw chuck

It's always been my intent to make the sort of spider you suggest. It will be easier now that I have a crude sort of rotary table. Drilling the jaws will become a possibillity should I ever finish my EDM drill. That would also open up the possibilty of mounting soft jaws (though I'm more likely to w...
by John Hasler
Sun Apr 15, 2018 9:02 am
Forum: General Discussion
Topic: grinding a three jaw chuck
Replies: 28
Views: 515

Re: grinding a three jaw chuck

I've not tried this yet. It will have marginal benefits. It does eliminate the sharp edge that would dig in on larger diameters, but there's still one there, it's just less pronounced, and will have been moved slightly inboard, towards center. Worth doing for those who might hope for the best possi...
by John Hasler
Sat Apr 14, 2018 7:06 pm
Forum: General Discussion
Topic: grinding a three jaw chuck
Replies: 28
Views: 515

Re: grinding a three jaw chuck

Harold writes: > If you alter the edges of the jaws, unless you do it in perfect symmetry, > the piece will be offset to some degree, giving up some of the precision > you had hoped to establish. I would recommend you do not alter the edges, > although when gripping pieces larger than the chosen dia...
by John Hasler
Fri Apr 13, 2018 10:31 pm
Forum: Lathes
Topic: ABOM sized lathe
Replies: 45
Views: 970

Re: ABOM sized lathe

mcostello writes:
> Now 1 furnace producing the same 300 tons 24-7 and they said it is 1/4 of America's production.

That's about 110,000 tons per year. In 2014 the USA produced 88,000,000 tons of steel.
by John Hasler
Fri Apr 13, 2018 6:01 pm
Forum: Lathes
Topic: ABOM sized lathe
Replies: 45
Views: 970

Re: ABOM sized lathe

Russ writes: > ...my impression is that most of the vast production capacity we once had is now derelict. And obsolete. The entire complex was developed to exploit high-grade ore from the Iron Range. That high-grade ore is gone. Nucor has a mill in Gary, though. Not surprising: scrap is probably rea...
by John Hasler
Fri Apr 13, 2018 3:37 pm
Forum: Lathes
Topic: ABOM sized lathe
Replies: 45
Views: 970

Re: ABOM sized lathe

BadDog wrote:
Fri Apr 13, 2018 3:28 pm
What used to be called Steel Mills in the US are now called "Still Mills", aka huge abandoned buildings...
Interesting that the USA manages to be the world's fourth largest steel producer and twelfth largest exporter with no steel mills...
by John Hasler
Fri Apr 13, 2018 3:29 pm
Forum: Welding
Topic: Welding on a pickup frame
Replies: 11
Views: 881

Re: Welding on apickup frame

Having welded custom exhaust for a few years, I can tell you with certainty, we never disconnected batteries or ECMs ever. And as for 'isolating the grounds' by disconnecting the battery, Hah! All you will do is force stray current into whatever is grounded to the frame instead of into that acid co...
by John Hasler
Thu Apr 12, 2018 10:04 pm
Forum: The Junk Drawer
Topic: I Hate Coyotes
Replies: 56
Views: 1604

Re: I Hate Coyotes

I wondered what you were talking about, and then I remembered the pythons. Here's how stupid the government is: they gave people PERMITS to catch them. PERMITS, when they should be begging everyone who has a gun to shoot the silly things. I don't know how pythons taste. Someone needs to look into i...
by John Hasler
Thu Apr 12, 2018 7:04 pm
Forum: The Junk Drawer
Topic: I Hate Coyotes
Replies: 56
Views: 1604

Re: I Hate Coyotes

warmstrong1955 wrote:
Thu Apr 12, 2018 6:17 pm
You guys in Florida got snakes big enough to justify a .458 or maybe a 50 cal..... just to slow 'em down.....

:)
I thought the gators took care of the snakes (and vice-versa).