Search found 16732 matches

by Harold_V
Mon Oct 22, 2018 3:07 pm
Forum: General Discussion
Topic: Plating brass over chrome
Replies: 8
Views: 136

Re: Plating brass over chrome

The phenomenon is discussed in Hoke's book on refining. When gold is applied, or even placed in contact with silver, if is found to migrate. It literally diffuses in to the other element, eventually disappearing (as far as sight is concerned). It's still there, but has been absorbed. Gold plated cop...
by Harold_V
Mon Oct 22, 2018 2:37 pm
Forum: Lathes
Topic: Threading without the end groove
Replies: 28
Views: 3673

Re: Threading without the end groove

Newer editions of Machinery's Handbook are actually less useful for manual machining than old ones. They started deleting some of what is considered obsolete data to make room for more CNC-related stuff so that the book wouldn't get to be a foot thick. Yep! I agree, although Patio (one of our reade...
by Harold_V
Mon Oct 22, 2018 3:04 am
Forum: General Discussion
Topic: Plating brass over chrome
Replies: 8
Views: 136

Re: Plating brass over chrome

Strange as it may appear, gold readily migrates towards base metals, but that is prevented by nickel plating. For that reason, it is common in industry to nickel plate electrical components that are gold finished. I'm not suggesting that that is the reason Colt plated first with nickel, but it certa...
by Harold_V
Mon Oct 22, 2018 1:42 am
Forum: Lathes
Topic: Threading without the end groove
Replies: 28
Views: 3673

Re: Threading without the end groove

Lets start with the thread size, which is NOT in the national course series. If it was NC, it would be six threads/inch. That said, what you have is likely considered to be an N-3 (class three) thread. Pitch diameter for that particular thread would be 1.4188"/1.4251". Minor diameter, which is the s...
by Harold_V
Sun Oct 21, 2018 4:14 pm
Forum: General Discussion
Topic: MEK sources
Replies: 20
Views: 330

Re: MEK sources

In the sixties I lived in Milan and was flying model airplane. There was a shop in the center of town that sold, to a 15 years old, the ingredients to make the fuel: Castor Oil, Methanol, Nitromethane, Amil Nitrate, Ethyl Ether all of which can kill you. Yep! It was the same here in the US. As a yo...
by Harold_V
Sun Oct 21, 2018 4:05 pm
Forum: General Discussion
Topic: MEK sources
Replies: 20
Views: 330

Re: MEK sources

Indications are, the chief reason for making the bulk of the chemicals unavailable to the general public is due to an attempt to limit individuals from making explosives. Nitric acid is a good example. It is still available for commercial use, and at a price that boggles the mind. Even in small quan...
by Harold_V
Sun Oct 21, 2018 3:42 pm
Forum: General Discussion
Topic: Making bushes
Replies: 6
Views: 181

Re: Making bushes

Geez and no one mentioned soft jaws. That was the first thing that popped into my mind. They would have to be made so that they almost entirely covered the od to prevent distortion, but that is what they are good for. --earlgo I actually did, as a second operation for chamfering the bore once the b...
by Harold_V
Sun Oct 21, 2018 1:59 am
Forum: General Discussion
Topic: MEK sources
Replies: 20
Views: 330

Re: KEK sources

I've edited your post to correct the heading (KEK was replaced with MEK). If that was the wrong thing to do, please indicate that here and I'll make the change back. I did it so those who might do a search would have the desired results. That said, I recently bought what HD likes to call a replaceme...
by Harold_V
Sun Oct 21, 2018 1:44 am
Forum: Riding Scale Railroading
Topic: In hopes of a build log, one day...
Replies: 9
Views: 269

Re: In hopes of a build log, one day...

Chuckle! Great story, one that is all too familiar. I recently reorganized part of my shop, and now I can't find anything (heavy sigh). By the way, if you think that retiring is going to give you another 8 hours in your schedule, you're in for one hell of a surprise. Still, I'm cheering for you, and...
by Harold_V
Sun Oct 21, 2018 1:28 am
Forum: General Discussion
Topic: Making bushes
Replies: 6
Views: 181

Re: Making bushes

For this operation, I wouldn't even consider anything except for simply turn and bore the bushing before parting off. I don't see any reason why you'd have to saw them, which is a waste of time. Second handling for the bore is also a waste of time, and most likely to introduce error (both in holding...
by Harold_V
Sat Oct 20, 2018 3:39 pm
Forum: The Junk Drawer
Topic: Tesla cars
Replies: 52
Views: 3464

Re: Tesla cars

I always think about you and Harold being nearby when we drive that way. Some day we'll meet... ~RussN My door is (*almost) always open to visitors, so don't hesitate to stop by if you have the time. Advance warning could even result in a fresh baked blueberry pie and a cup of coffee. One word of c...
by Harold_V
Sat Oct 20, 2018 3:32 pm
Forum: The Photo Album
Topic: Patio's projects
Replies: 424
Views: 76958

Re: Patio's projects

I had good fortune in finding a copy of that book on ebay, although it was a long time ago. You might consider that resource if you'd like a printed copy. Seems like I paid very little for mine (<$10), but I no longer recall the price.

H