Search found 4151 matches

by BadDog
Fri May 26, 2017 3:43 pm
Forum: eBay Sales
Topic: 3AT-4C- 4NS-Myford collets
Replies: 11
Views: 131

Re: 3AT-4C- 4NS-Myford collets

Yes, "this ebay forum" is what I was talking about too. And I only included the description of how to search a seller for those who might be interested in this specific case, or future issues. I have some sellers that I routinely check because I know they are local, giving me an edge when ...
by BadDog
Fri May 26, 2017 3:45 am
Forum: eBay Sales
Topic: 3AT-4C- 4NS-Myford collets
Replies: 11
Views: 131

Re: 3AT-4C- 4NS-Myford collets

I think he meant in the ebay forum.

And to search "truxnut", go to advanced and chose "all from seller" well down the page.
by BadDog
Wed May 24, 2017 2:04 am
Forum: General Discussion
Topic: World Metrology Day
Replies: 49
Views: 773

Re: World Metrology Day

Yes, radians makes SO much more sense for many things, but deg/min/sec has a variety of important ramifications (both historical and practical) as well. And geospatial coordinates are most often processed as decimal degrees of lat/lon. How many digits of precision are used gives you a rough implicit...
by BadDog
Tue May 23, 2017 12:50 pm
Forum: General Discussion
Topic: 4-jaw for rotary table
Replies: 4
Views: 140

Re: 4-jaw for rotary table

Coming from the front is very typical for "plain back" 4 jaw chucks. I've got an 8" Cushman 4 jaw that I use on my larger rotary table, and 6" Pratt Burnard 4 jaw that I use on my 6" indexer. Both are plain back and mount the same way, as do the plain backs I use on my lathe...
by BadDog
Mon May 22, 2017 2:23 pm
Forum: General Discussion
Topic: World Metrology Day
Replies: 49
Views: 773

Re: World Metrology Day

Going OT, but not quite true on the QWERTY keyboard. The major influence was not to be clumsy in order to slow typists, but rather to reduce the opportunity for physical jams of striker arms during very rapid typing. So the reality is exactly the opposite in that the goal was to facilitate much fast...
by BadDog
Sun May 21, 2017 8:14 pm
Forum: Welding
Topic: Aluminum Near-Weld
Replies: 15
Views: 234

Re: Aluminum Near-Weld

Oh, I well know (remember) the perils of aluminum. It seemed I could never really "see" the puddle, or more or less just a change in reflective gloss. So I never could do thin aluminum with any confidence, I doubt I could do it at all now (currently too bad to even be worth a try). I think...
by BadDog
Sun May 21, 2017 8:06 pm
Forum: General Discussion
Topic: World Metrology Day
Replies: 49
Views: 773

Re: World Metrology Day

I wouldn't have a bit of problem with switching to metric, as long as everyone just got on with it. It's the bastardized mixed up world where you never know what to expect (particularly in the automotive world) that really ticks me off. It sure makes calculations easier, but when standard distance u...
by BadDog
Sun May 21, 2017 7:55 pm
Forum: Welding
Topic: Aluminum Near-Weld
Replies: 15
Views: 234

Re: Aluminum Near-Weld

Wow, I envy you. I've been trying to make time to refamiliarize myself with TIG for a year now. I thought it would be an ideal thing to fool with while I recuperated from my new knees, but that didn't happen either. From the looks of your latest welds, you are at or nearing the skill range I was whe...
by BadDog
Sun May 21, 2017 7:41 pm
Forum: General Discussion
Topic: Surface Grinding
Replies: 28
Views: 740

Re: Surface Grinding

That's good to know (that the CBN and diamond not being so sensitive to speed). And I very much understand and share the concern, but how would that be different than other machines with variable speeds. If you left them at too high a speed for the tooling, disaster and death can be found there as w...
by BadDog
Sun May 21, 2017 1:50 pm
Forum: General Discussion
Topic: Surface Grinding
Replies: 28
Views: 740

Re: Surface Grinding

It strikes me that you could say similar things about a lathe, or mill. Run it fast for that 1/8" EM on the mill or small diameter collet work in a lathe, and switch to an 8" (relatively) unbalanced fly cutter or large 4 jaw chuck without changing the speed appropriately would also be a di...
by BadDog
Sun May 21, 2017 1:39 pm
Forum: Lathes
Topic: "Setting up Between Centers"
Replies: 12
Views: 299

Re: "Setting up Between Centers"

As to when you have enough real REAL precision, the answer is simple. When you can be confident that your parts meet the precision/tolerance you require. For most of the things I make, calipers or even a 6" or 12" rule is plenty good enough. For my more precision parts, a micrometer or ind...
by BadDog
Sat May 20, 2017 5:57 pm
Forum: Milling Machines
Topic: R8 Integral drill chuck
Replies: 18
Views: 411

Re: R8 Integral drill chuck

Mine use old OEM (US made) Jacobs straight shanks. Don't recall the length, but the Jacobs centers have 2 ground reference surfaces with a relieved section in between. I just cut mine right above the lower precision surface leaving it's full length for the collet to grip on. That surface is maybe 1/...

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