Search found 17044 matches

by Harold_V
Sun Apr 14, 2019 4:57 pm
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 33
Views: 5880

Re: N&W S1a Project - Tender Build

Deformation, unless there's a huge amount of internal stress, shouldn't be a concern. What I would do is avoid heating to the point of causing surface degradation, which happens at red heat. I would make the choice of targeting the straw color, which should provide a generous margin of safety. Also,...
by Harold_V
Sat Apr 13, 2019 1:06 am
Forum: General Discussion
Topic: Small Diameter Slitting Saw
Replies: 13
Views: 483

Re: Small Diameter Slitting Saw

Rick's trick of narrowing works, but the typical Woodruff has relief ground on the sides, which is now removed. For a shallow cut, you may enjoy success, but if there's any question, it pays to reproduce the relief, which is nothing more than a (shallow) hollow grind. It may not be apparent to the c...
by Harold_V
Sat Apr 13, 2019 1:02 am
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 33
Views: 5880

Re: N&W S1a Project - Tender Build

A belated reply, thanks to an issue with my tired, old computer. Here's what I was trying to post when it quit on me: I must have been in a fog, as I now understand what you meant. If you have an arbor press, it would be a good idea to attempt to dismantle the test piece, keeping in mind that it may...
by Harold_V
Fri Apr 12, 2019 3:16 pm
Forum: General Discussion
Topic: Small Diameter Slitting Saw
Replies: 13
Views: 483

Re: Small Diameter Slitting Saw

Jewelry supply stores may be a source for thin, small diameter saw blades. That was the case for me when I was actively machining, and was my source of choice due to quality and cost. Check the yellow pages in your town.

H
by Harold_V
Fri Apr 12, 2019 2:03 am
Forum: Build Log
Topic: N&W S1a Project - Tender Build
Replies: 33
Views: 5880

Re: N&W S1a Project - Tender Build

I'm a little confused with the numbers you posted. If you have a diameter that measures .625" and you add a thou, it would then measure .626". The number you posted represents a miniscule amount- slightly more than six tenths of a thou. In this case, you'd likely be well served to use a little more ...
by Harold_V
Fri Apr 12, 2019 1:30 am
Forum: General Discussion
Topic: Machine tapping PVC sheet with small blind holes
Replies: 14
Views: 485

Re: Machine tapping PVC sheet with small blind holes

I'm not convinced the viscosity of the wax you speak of will be troublesome, as the tap will heat, likely resulting in a fluid condition of the wax at the point of cut. However, before scrapping something of value, might be a good idea to do a few test holes first, doing the exact thing you'd do on ...
by Harold_V
Thu Apr 11, 2019 4:08 pm
Forum: General Discussion
Topic: Machine tapping PVC sheet with small blind holes
Replies: 14
Views: 485

Re: Machine tapping PVC sheet with small blind holes

These came in random order, not one right after another. That said the first trashed hole came after very many with no problem and with a plain tap of conventional 4 straight flute design. Trouble shooting is one of my quirks. You just detailed the reason for the failure. Conventional taps are also...
by Harold_V
Thu Apr 11, 2019 3:55 pm
Forum: General Discussion
Topic: Machine tapping PVC sheet with small blind holes
Replies: 14
Views: 485

Re: Machine tapping PVC sheet with small blind holes

Russ Hanscom wrote:
Thu Apr 11, 2019 9:37 am
Harold, should not this thread be more appropriate in General Discussions?
Indeed, and it will get moved immediately. Thanks, Russ. I wasn't paying attention.

H
by Harold_V
Thu Apr 11, 2019 2:48 am
Forum: General Discussion
Topic: Machine tapping PVC sheet with small blind holes
Replies: 14
Views: 485

Re: Machine tapping PVC sheet with small blind holes

Mark 2 wrote:
Wed Apr 10, 2019 8:42 pm
I still ended up with 5 holes trashed.
In any particular order, or were they scrapped randomly?
I ask because there may be an obvious reason if they came one after the other.

H
by Harold_V
Thu Apr 11, 2019 2:45 am
Forum: The Junk Drawer
Topic: SS is toxic in California
Replies: 23
Views: 1136

Re: SS is toxic in California

mcostello wrote:
Wed Apr 10, 2019 8:47 pm
Why doesn't California cut to the chase and save money? Just publish the short list of everything that is not known to cause cancer.
I think they did. It's the blank page found in their list of cancer causing agents.

H
by Harold_V
Tue Apr 09, 2019 3:48 pm
Forum: General Discussion
Topic: Reading rotary table????
Replies: 18
Views: 564

Re: Reading rotary table????

Hmmm. I must be missing something. I use a BP 12" rotab, which has degree markings on the table periphery, along with a pointer. The hand wheel is calibrated in minutes (not seconds) on a vernier scale, so splitting degrees is easy and reliable. I start with the rotab on "0", so the marks make sense...
by Harold_V
Tue Apr 09, 2019 1:39 am
Forum: Live Steam
Topic: Little engines 1" line of engines
Replies: 33
Views: 3122

Re: Little engines 1" line of engines

It appears to me that the real problem with some vendors isn't being addressed, and, for them, I am not sympathetic, nor should I be. That's the one whereby lip service is provided, so false hope is instilled in the buyer, when the seller knows damned well the delivery won't be met. Why is it one ca...