Search found 215 matches

by chief
Tue Sep 01, 2020 10:23 am
Forum: General Discussion
Topic: Stress Release Distortion
Replies: 9
Views: 753

Re: Stress Release Distortion

Thanks Harold, I was just curious, I've machined a bit of Delrin myself and hadn't noticed any problems, but most of my stuff has been non critical, such as knobs and bottle stoppers.

Terry
by chief
Mon Aug 31, 2020 10:55 am
Forum: General Discussion
Topic: Stress Release Distortion
Replies: 9
Views: 753

Re: Stress Release Distortion

I'm glad your part worked out for you John, but I have a followup question for Harold. You mentioned lots of stress in Delrin, is there a time factor involved for the finish machining? By that I mean, can you start the finishing as soon as you are through with the roughing, or is it better to wait s...
by chief
Sun Jun 21, 2020 11:41 am
Forum: General Discussion
Topic: Mystery Metal
Replies: 15
Views: 3693

Re: Mystery Metal

Just to ad my 2 cents worth, Harold's post about the water brought back a memory. Long ago in a galaxy not too far away, I was in an aircraft fire fighting class in the navy. As a demo of what not to do, they had an A3 aircraft magnesium main mount wheel in a fire pit and hit it with a fire hose. It...
by chief
Sun Dec 08, 2019 12:46 pm
Forum: General Discussion
Topic: Anodizing Power Supply?
Replies: 4
Views: 1717

Re: Anodizing Power Supply?

I haven't tried it myself, but in a lot of the video's I've seen, folks use automotive battery chargers. Usually fairly simple and inexpensive ones, some of the higher end ones are too smart, they know when they're not hooked to a battery. LoL If you already have a charger, you might give it a try o...
by chief
Sun Oct 27, 2019 2:02 pm
Forum: General Discussion
Topic: Size of Grinder Pedestal Platform?
Replies: 6
Views: 2686

Re: Size of Grinder Pedestal Platform?

Steve, I find some space in front of the wheels useful for clamping on temporary accessories, such as jigs for grinding long woodworking chisels and such.

Terry
by chief
Thu Oct 03, 2019 12:15 pm
Forum: General Discussion
Topic: Upgrading Harbor Freight 20-ton Press to Air
Replies: 34
Views: 9041

Re: Upgrading Harbor Freight 20-ton Press to Air

Liveaboard,
I added a HF 20 ton air over hyd jack to my press, and it has the standard jack handle style pump as well as the air system. I use that, as you suggested, for fine control.

Terry
by chief
Wed Oct 02, 2019 9:21 am
Forum: General Discussion
Topic: Huanyang VFD 2.2
Replies: 14
Views: 5030

Re: Huanyang VFD 2.2

I believe you are correct about attitudes for combo machines in the US. Our experience over the years was that machines claiming multiple capabilities rarely performed any of of them well and were cheaply constructed. An exception may be the Shopsmith woodworking machines. I've never used one, but t...
by chief
Tue Oct 01, 2019 12:01 pm
Forum: General Discussion
Topic: Huanyang VFD 2.2
Replies: 14
Views: 5030

Re: Huanyang VFD 2.2

Thanks for the clarification guys, I hadn't realized what type of machine an X 31 was.

Terry
by chief
Mon Sep 30, 2019 12:02 pm
Forum: General Discussion
Topic: Huanyang VFD 2.2
Replies: 14
Views: 5030

Re: Huanyang VFD 2.2

Liveaboard, I'm far from expert on VFD's, but I thought I have read here and other places that the typical VFD doesn't work well with multiple loads. If that is true, and I hope someone else can confirm or rebutt, a VFD might not be the best choice for your friend's 3 motor machine. Perhaps a phase ...
by chief
Thu Aug 22, 2019 3:27 pm
Forum: General Discussion
Topic: Shop Uses for Scuba Tank?
Replies: 16
Views: 4728

Re: Shop Uses for Scuba Tank?

A lot of high end air rifles are called PCP for pre-charged pneumatics and operate at quite high pressures, around 3000 psi. Sometimes they use scuba tanks as a portable refill source. You can even get hand pumps that go north of 3500 psi. They look like old fashioned bicycle pumps, but I'm guessing...
by chief
Thu Aug 22, 2019 12:39 pm
Forum: Milling Machines
Topic: Storing End Mills
Replies: 22
Views: 13458

Re: Storing End Mills

So I ordered the ice trays I mentioned yesterday, and thru the magic of Amazon (love em or hate em) I got them today. They have a silicon insert, the blue part, that is flexible to enable pushing out the ice sticks, and it has a greasy feel to it. Although it feels greasy, I can't detect any residue...
by chief
Thu Aug 22, 2019 10:41 am
Forum: General Discussion
Topic: Shop Uses for Scuba Tank?
Replies: 16
Views: 4728

Re: Shop Uses for Scuba Tank?

Steve, don't know about where you live, but in a lot of places you can't even get the tanks re-filled without a cert card.

Terry