Search found 16653 matches

by Harold_V
Sat Sep 22, 2018 6:00 pm
Forum: General Discussion
Topic: Metalllurgy question
Replies: 9
Views: 174

Re: Metalllurgy question

No, they were kept on dry ice after they were quenched. I've seen small table top furnaces about the size of a beer mug that are used to re-heat treat the rivets just prior to use. The manufacturer will also do that for you and then ship them via air freight packed in dry ice. Yep, what Glenn said....
by Harold_V
Sat Sep 22, 2018 5:42 pm
Forum: Milling Machines
Topic: Spindle collet grub screw
Replies: 5
Views: 57

Re: Spindle collet grub screw

What Richard said.

H
by Harold_V
Sat Sep 22, 2018 5:34 pm
Forum: Live Steam
Topic: L.E. American & Feedwater?
Replies: 14
Views: 510

Re: L.E. American & Feedwater?

A spring offers the possibility of stopping (or seriously restricting) flow in the desired direction, much the same way as no spring. An installed obstruction that allows fluids to bypass when the ball is seated in the wrong direction would be far more desirable.

H
by Harold_V
Sat Sep 22, 2018 4:33 pm
Forum: Milling Machines
Topic: Spindle collet grub screw
Replies: 5
Views: 57

Re: Spindle collet grub screw

Lots of the Pro guys remove it entirely . Something to mull. I've never removed mine, and have no regrets, but there is an upside to removal. I've owned my mill since 1977, at which time it was purchased new. I am the only person who operates the machine, so I know what it's been through. That said...
by Harold_V
Sat Sep 22, 2018 8:14 am
Forum: Milling Machines
Topic: Tightening a vise
Replies: 14
Views: 241

Re: Tightening a vise

For example milling a thin part on edge do not keep the end mill axis on center and cut across, the part will vibrate and sing, move off axis to just cover the part with the end mill tip, that way most of the force is pushing the long axes of the part. Correct. Also, which edge of the end mill is c...
by Harold_V
Sat Sep 22, 2018 8:05 am
Forum: Milling Machines
Topic: Tightening a vise
Replies: 14
Views: 241

Re: Tightening a vise

Even a Kurts fixed jaw can flex enough to change a referance coordinate on tight tollerance parts. I've related this story before, but the very reason I purchased my first Kurt was because of what you mentioned. I had a nearly new Bridgeport vise, which I had purchased new, and was trying to hold 5...
by Harold_V
Fri Sep 21, 2018 3:36 pm
Forum: Live Steam
Topic: WHO NEEDS CNC?
Replies: 34
Views: 1510

Re: WHO NEEDS CNC?

It isn't a matter of "need". CNC allows for repetitive cuts without human intervention, and yields parts that are far more consistent than those produced by the average guy on the machine, many of whom use tolerance as an excuse for poor skill levels. That isn't true of all machinists, of course. So...
by Harold_V
Thu Sep 20, 2018 3:20 pm
Forum: General Discussion
Topic: Gage blocks
Replies: 54
Views: 1527

Re: Gage blocks

To add to your errors? I recently found out from a Mitutoyo video that gauge blocks can change up to 1 micron per inch per year. No explanation was given for why that happens only that it can. For what ever reason, folks seem to think of metals as being stable--benign---unchanging. Nothing could be...
by Harold_V
Thu Sep 20, 2018 3:13 pm
Forum: Live Steam
Topic: WHO NEEDS CNC?
Replies: 34
Views: 1510

Re: WHO NEEDS CNC?

You don't need CNC, you might want it but you don't need it. We're modeling machines build before CNC was even a distant idea. I've often looked at photos from the locomotive builder in the early 1900's and remarked at the work they did with the tools they had. I've wondered if you could assemble a...
by Harold_V
Thu Sep 20, 2018 3:21 am
Forum: General Discussion
Topic: Gage blocks
Replies: 54
Views: 1527

Re: Gage blocks

To add to your errors? I recently found out from a Mitutoyo video that gauge blocks can change up to 1 micron per inch per year. No explanation was given for why that happens only that it can. For what ever reason, folks seem to think of metals as being stable--benign---unchanging. Nothing could be...
by Harold_V
Tue Sep 18, 2018 3:14 pm
Forum: The Junk Drawer
Topic: Best Type of Axe for Busting Rotten Stump?
Replies: 81
Views: 2251

Re: Best Type of Axe for Busting Rotten Stump?

SteveHGraham wrote:
Tue Sep 18, 2018 3:10 pm
Now, Harold. How would you feel if I let the axe guy tell me you were wrong about machining?
"that's the world according to Harold."

H
by Harold_V
Tue Sep 18, 2018 3:01 pm
Forum: Lathes
Topic: Hand grinding tool bits
Replies: 16
Views: 1127

Re: Hand grinding tool bits

I almost never HONE a tool edge. Honing can help get a better finish, but I can't prove the tool lasts any better! And while someone else is honing his tool, I am cutting again. That one is a "no brainer". A tool that is honed WILL yield better service life, but unless you use a tool for producing ...