Search found 16019 matches

by Harold_V
Thu Dec 14, 2017 4:52 pm
Forum: General Discussion
Topic: Brass v.s. Bronze?
Replies: 13
Views: 317

Re: Brass v.s. Bronze?

I have always wondered about the differences between bronze and brass. I was just Googling around, and I read that bronze is hard and brittle compared to brass, and that it resists corrosion better. I guess this is why we had a Bronze Age and no Brass Age. One can't make that statement and be right...
by Harold_V
Thu Dec 14, 2017 2:39 am
Forum: General Discussion
Topic: Cheap Tools from China....
Replies: 8
Views: 388

Re: Cheap Tools from China....

But a cultural thing gets in the way, a "What can we get away with." creeps in. A lot checking is required. I tend to agree, although we, as a nation, are partially responsible for the dreadful level of quality that has been provided, due, in part, to our willingness to settle for low qua...
by Harold_V
Wed Dec 13, 2017 2:46 am
Forum: General Discussion
Topic: Brass v.s. Bronze?
Replies: 13
Views: 317

Re: Brass v.s. Bronze?

On the other hand , if looks are important I'd pick the bronze simply because I like it's color quite a bit more . Depends on the bronze. Manganese bronze is, for lack of better description, butt ugly. It's a rather yellow gray color when bright, and darkens to almost black when it oxidizes (takes ...
by Harold_V
Wed Dec 13, 2017 2:42 am
Forum: General Discussion
Topic: Brass v.s. Bronze?
Replies: 13
Views: 317

Re: Brass v.s. Bronze?

pete wrote: It's possibly Aluminum Bronze, or maybe Harolds Phosphor Bronze?

It would be difficult to confuse those two. Aluminum bronze has a pale yellow color, while phosphor bronze looks very much like copper. Even leaded, it's quite red.

Aluminum bronze is not fun to machine, either.

H
by Harold_V
Tue Dec 12, 2017 4:23 pm
Forum: General Discussion
Topic: Brass v.s. Bronze?
Replies: 13
Views: 317

Re: Brass v.s. Bronze?

It would be my opinion that substituting bronze for brass would be quite acceptable, as bronze has qualities that are generally not found in brass. The chief difference between brass and bronze is the alloying agent. Brass is typically made with zinc, while bronze is typically made with tin. Unfortu...
by Harold_V
Tue Dec 12, 2017 2:22 am
Forum: Grand Scale Railroading
Topic: 12" gage truck sides
Replies: 10
Views: 244

Re: 12" gage truck sides

RK, This forum software is a bit odd. Outgoing Messages will stay in your outbox until the recipient logs in next. Then they are downloaded to the recepient. They don’t go out automatically, but they do go out, assuming the forum member continues to log in. Gpb That's not how it works. A PM remains...
by Harold_V
Tue Dec 12, 2017 1:59 am
Forum: General Discussion
Topic: Cheap Tools from China....
Replies: 8
Views: 388

Re: Cheap Tools from China....

It's likely not a wise thing to do when making blanket negative statements about things from China. Do keep in mind, those people are well advanced in modern technology, well proven by their abilities in defense and space, to say nothing of their well qualified civil engineering. Sure, you can get c...
by Harold_V
Mon Dec 11, 2017 4:27 pm
Forum: General Discussion
Topic: Learned something about drilling today
Replies: 25
Views: 692

Re: Learned something about drilling today

Wiggler clarification request: We are talking about the sharp point wiggler, not the ball end edge finder, right? Correct! Is the pointy wiggler used rotating or still? Rotating. That's the only way you are ASSURED that the tip is the centerline of the spindle. If you get it running true, then stop...
by Harold_V
Mon Dec 11, 2017 2:29 am
Forum: General Discussion
Topic: Learned something about drilling today
Replies: 25
Views: 692

Re: Learned something about drilling today

Due to the split point, yes, you likely can rely on the drill to cut on position, especially if you choose screw machine drills. They're stiff enough to drill where they're pointed. I am not suggesting that they would satisfy critical tolerance work---but you should be able to expect reasonable loca...
by Harold_V
Sun Dec 10, 2017 4:55 pm
Forum: General Discussion
Topic: Learned something about drilling today
Replies: 25
Views: 692

Re: Learned something about drilling today

This brings up a related thought. When center punching prior to center drilling, do you use a prick punch alone or follow up with a center punch? The school of thought in this regard is that a prick punch has a finer point, as well as a diminished angle, so location is easier to establish, with gre...
by Harold_V
Sun Dec 10, 2017 4:41 pm
Forum: General Discussion
Topic: Face plate options?
Replies: 5
Views: 236

Re: Face plate options?

Bentworker wrote: I was lazy and tried to do it in a three jaw, but ended up with about .006” difference in thickness,

Can you say "soft jaws"?

H
by Harold_V
Sun Dec 10, 2017 2:54 am
Forum: General Discussion
Topic: Learned something about drilling today
Replies: 25
Views: 692

Re: Learned something about drilling today

Somehow most machinists use center-drills for starting holes. Center-drills are for use of a dead or live center --period I can address that issue, and it's a no-brainer. Center drills were, and often are, used for starting a hole for the same reasons one might choose a ball end mill. It's very sho...

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