Search found 730 matches

by Lew Hartswick
Sat Sep 26, 2020 9:20 am
Forum: General Discussion
Topic: ER Collets.
Replies: 10
Views: 719

Re: ER Collets.

That video would probably very helpful IF the guy would have talked slow enough to be understood . So many people seem to be practicing to be auctioneers . :-(
...lew...
by Lew Hartswick
Thu Jul 30, 2020 9:16 am
Forum: General Discussion
Topic: Duburring Raw Stock
Replies: 14
Views: 2558

Re: Duburring Raw Stock

When I was working as an engineer, it was standard practice for the machinists to deburr each and every surface, and I never observed them deburring raw stock for personal safety. I may have just missed it, or the company order in sufficient quantity that they could get deburred raw stock as a matt...
by Lew Hartswick
Mon Jul 27, 2020 8:28 am
Forum: General Discussion
Topic: Has anyone built a guide for a center drill.
Replies: 9
Views: 2176

Re: Has anyone built a guide for a center drill.

Back in ancient times there were machines that you stuck the end of a bar into and they centered and drilled it automatically. You could make an end cap on the lathe, stepped to accept the workpiece and the center drill, and use a hand drill to make a centered hole. I did exactly that a few weeks a...
by Lew Hartswick
Wed Jul 22, 2020 8:23 am
Forum: General Discussion
Topic: single point boring with a drill press
Replies: 4
Views: 1260

Re: single point boring with a drill press

You've just done "line boring" on a simulated Vertical lathe . :-) All that's different is a "steady rest" in place of a tailstock center. :-)
...lew...
by Lew Hartswick
Wed Jul 22, 2020 8:18 am
Forum: General Discussion
Topic: Duburring Raw Stock
Replies: 14
Views: 2558

Re: Duburring Raw Stock

Sheech! It's "raw material". Do you expect the steaks from the butcher to be already grilled? :-)
...lew...
by Lew Hartswick
Wed Jul 22, 2020 8:13 am
Forum: General Discussion
Topic: Split Cotters
Replies: 9
Views: 1514

Re: Split Cotters

They aren't quite as "simple to make" if you cope the ends of cotter to the shaft your clamping. I've done that for the new ones I've made for a Bridgeport quill. I feel that is a better (less marring) thing. It does mean setting up and boring to the right radius.
...lew...
by Lew Hartswick
Sun Jun 14, 2020 7:48 pm
Forum: General Discussion
Topic: 123 blocks Dumb Question
Replies: 12
Views: 4137

Re: 123 blocks Dumb Question

And while you're at it make some with 5/16 and 1/4 threaded holes to fit the slots. They come in handy often.
...lew...
by Lew Hartswick
Thu Jun 04, 2020 7:39 am
Forum: General Discussion
Topic: Making carbide tipped boring bars
Replies: 8
Views: 2097

Re: Making carbide tipped boring bars

If you haven't caught Robin Renzetti on youtube, you should. He does some incredibly precise work. Here he makes his own carbide-tipped boring / internal grooving tools. He makes them so precise that he can swap them out on the CNC and keep going. https://www.youtube.com/watch?v=OjQ5pOkCeW0 Steve I...
by Lew Hartswick
Sun Mar 01, 2020 10:50 am
Forum: General Discussion
Topic: Dead soft Aluminum
Replies: 14
Views: 3926

Re: Dead soft Aluminum

I think that McMaster 1100 stuff would be the ideal but all I need for ever would be a 3 or 4 ft., a 50 ft roll would be overkill :-) All the cans and like has been tried in the past and is way toooo hard . I don't "do" any welding even Oxy Acet. so that annealing is out. As to how much machining is...
by Lew Hartswick
Sat Feb 29, 2020 5:13 pm
Forum: General Discussion
Topic: Dead soft Aluminum
Replies: 14
Views: 3926

Dead soft Aluminum

I have a small piece of the stuff but am going to need several square feet at least. It's about .005" thick but would like some even thicker if possible. The stuff I have is like very thick Food wrap foil . I want to use it to cushion the knurl when I hold a bunch of parts in the lathe chuck to fini...
by Lew Hartswick
Mon Feb 10, 2020 12:10 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 18
Views: 5858

Re: grinding carbide inserts

Re: Consider this; these boring bars + 10 inserts cost $18 for the lot.
boring bars.
Until the "Virus" problem is solved You may have a problem getting any of those. I was jut getting ready to buy a set of those. :-(
...lew...
by Lew Hartswick
Sun Feb 02, 2020 10:16 am
Forum: General Discussion
Topic: New in town
Replies: 26
Views: 6785

Re: New in town

I was thinking the same thing. If the "magic" word is "Stainless" just use some other BS terms like the alloy words and numbers to confuse the silly consumers. :-) Then there is always the magic word "Billet". :-)
...lew...