Search found 16826 matches

by Harold_V
Sun Dec 16, 2018 4:43 pm
Forum: Live Steam
Topic: Pvc pipe for air ??
Replies: 7
Views: 132

Re: Pvc pipe for air ??

PVC pipe offers the possibility of failing catastrophically (at ANY pressure). There are plastics on the market that do not. Doesn't mean it *will* fail----just that it can do so with consequences.

H
by Harold_V
Sun Dec 16, 2018 5:25 am
Forum: Live Steam
Topic: Water treatment for iron boiler?
Replies: 13
Views: 479

Re: Water treatment for iron boiler?

I didn't imply the use of lime, as I realize its consequences. For me, it was the perfect solution for the extraction of values, as my solutions were not heated. I did imply altering the pH, which can be accomplished by other means that wouldn't result in residue deposition. I suspect boiler treatme...
by Harold_V
Sat Dec 15, 2018 4:07 pm
Forum: The Junk Drawer
Topic: Strategies for Removing Rocks from Yard
Replies: 30
Views: 2452

Re: Strategies for Removing Rocks from Yard

My neighbor's land has water worn pebbles and tiny sea shells. We're 80M above sea level at the moment. In Utah, if one was to hike above the Stairs power station, located in Big Cottonwood Canyon, there's a myriad of types of small sea shells imbedded in the rock. The valley floor is right at 4,10...
by Harold_V
Sat Dec 15, 2018 4:00 pm
Forum: Casting & Foundry Work
Topic: The slow evoltuion of a long term plan
Replies: 15
Views: 473

Re: The slow evoltuion of a long term plan

I have one of these if you need a scale Harold: Horizon 500 KG / 1100 LBS Digital Crane Scale Heavy Duty Industrial Hanging Scale That could prove to be real useful for me once I get the furnaces installed. One of them is equipped with hydraulic tilting, but the other is not. It could be that I wil...
by Harold_V
Sat Dec 15, 2018 5:03 am
Forum: Live Steam
Topic: Water treatment for iron boiler?
Replies: 13
Views: 479

Re: Water treatment for iron boiler?

I know precious little about the operation of boilers, but I have some experience with running a (small, continuous feed) ball mill. That experience should translate in to something useful for anyone who operates a boiler and is concerned about rusting. Ballmill.jpg Because the discharge from the ba...
by Harold_V
Fri Dec 14, 2018 5:22 pm
Forum: Milling Machines
Topic: Diagnosing a Milling Machine problem
Replies: 26
Views: 751

Re: Diagnosing a Milling Machine problem

I meant the relief of the cutting edge. Thanks for the closeups of the end mill. I do not see what I thought I was seeing, but it's clear to me that the end mill is the problem. Once slightly dull, end mills, as well as most cutting tools, experience what might be called a "melt down". Cutting press...
by Harold_V
Fri Dec 14, 2018 5:05 pm
Forum: The Junk Drawer
Topic: Brass
Replies: 14
Views: 353

Re: Brass

Interesting to me to read that lead is being eliminated over a large portion of our environment. If memory serves, there are no lead smelters remaining in the US. Indications are that in time, and it may not be very long, lead will be as difficult to deal with as mercury. There are times when I wond...
by Harold_V
Fri Dec 14, 2018 4:58 am
Forum: The Junk Drawer
Topic: Brass
Replies: 14
Views: 353

Re: Brass

Old plumbing castings used to contain lead, and machined very nicely. Here, in the US, that is no longer true, as there's a full on drive to eliminate lead in almost everything. That said, yeah, it does cut like butter. Generally doesn't yield long strings, but instead short dull in appearance chips...
by Harold_V
Fri Dec 14, 2018 2:27 am
Forum: The Junk Drawer
Topic: Brass
Replies: 14
Views: 353

Re: Brass

I'd never heard that about brass; recently I made a couple of 3/8 brass pipe adapters. Cut them, bored them, threaded internally. All with carbide. With modern carbide, it shouldn't be an issue, although what I said about the tools being superficially dulled by previously machining steel can be. A ...
by Harold_V
Thu Dec 13, 2018 2:58 am
Forum: Milling Machines
Topic: Diagnosing a Milling Machine problem
Replies: 26
Views: 751

Re: Diagnosing a Milling Machie problem

Took the setup down and cleaned an measured everything. No debris, tools are the size marked. Found a small dent in the end mill. Looks like it came that way as it appears to have TiN coating in it. Found no burrs in the collet or spindle. Lubricated the draw bar and the threaded end of the collet....
by Harold_V
Thu Dec 13, 2018 2:40 am
Forum: The Junk Drawer
Topic: Brass
Replies: 14
Views: 353

Re: Brass

I remember years ago, I used to work for some old coot who always said your not supposed to use carbide on brass?...and now 40 some years later, I still sometimes wonder why ???? Pretty simple, really. At that time, there was no micro-grain carbide, so what one considers sharp really wasn't. As bra...
by Harold_V
Wed Dec 12, 2018 4:14 pm
Forum: Casting & Foundry Work
Topic: The slow evoltuion of a long term plan
Replies: 15
Views: 473

Re: The slow evoltuion of a long term plan

Unfortunately, I am unable to support the top of the column on my setup. That's the reason I welded the remnant piece of the jib to the back side of the 6" pipe that is the column. It made it far stiffer, but there's still flex, which really can't be eliminated. Had I wanted greater capacity, I'd ha...