Search found 516 matches

by Magicniner
Tue Oct 01, 2019 11:44 am
Forum: General Discussion
Topic: Harbor Freight 6000-Pound Lift Thoughts
Replies: 27
Views: 2074

Re: Harbor Freight 6000-Pound Lift Thoughts

RONALD wrote:
Tue Oct 01, 2019 9:25 am
I have three Harbor Frate Lift tables, and they all have one problem, when you pump them up to a desired height, they slowly go back down.
What happens that makes them safe in the event of a major hydraulic failure?
by Magicniner
Mon Sep 30, 2019 3:30 am
Forum: General Discussion
Topic: Huanyang VFD 2.2
Replies: 14
Views: 1422

Re: Huanyang VFD 2.2

Buying cheap equipment is a crap shoot, but if you have no pressing need to use it, and can afford the time to sort out a problematic unit if you get one or the cost to replace it if it fails and is badly supported may as well take a punt on the cheap units.
by Magicniner
Fri Sep 06, 2019 11:03 am
Forum: General Discussion
Topic: Re heat treating mild steel
Replies: 18
Views: 2364

Re: Re heat treating mild steel

Stamped and formed brackets and panels in Mild Steel exhibit Work Hardening, not Heat Treatment, but annealing them returns them to the soft state losing any additional hardness and rigidity afforded by the Work Hardening.
by Magicniner
Mon Sep 02, 2019 12:08 pm
Forum: General Discussion
Topic: Re heat treating mild steel
Replies: 18
Views: 2364

Re: Re heat treating mild steel

Mild Steel does not have the Carbon content to allow heat treatment other than annealing when it is work hardened. And yet; The previous owner of my place was a farmer / bricklayer. He left some old tools behind, including some spikes made from re-rod. The pointy ends have been hardened; I can't sa...
by Magicniner
Sat Aug 31, 2019 11:00 am
Forum: General Discussion
Topic: Re heat treating mild steel
Replies: 18
Views: 2364

Re: Re heat treating mild steel

The hardness in mild steel automotive panels is work hardening created when they are pressed into shape, there is no heat treat process to put it back. Hmm, was this too complex to impart the information? Mild Steel does not have the Carbon content to allow heat treatment other than annealing when ...
by Magicniner
Fri Aug 30, 2019 2:48 pm
Forum: General Discussion
Topic: Re heat treating mild steel
Replies: 18
Views: 2364

Re: Re heat treating mild steel

The hardness in mild steel automotive panels is work hardening created when they are pressed into shape, there is no heat treat process to put it back.
by Magicniner
Thu Aug 29, 2019 8:30 am
Forum: General Discussion
Topic: Shop Uses for Scuba Tank?
Replies: 16
Views: 2148

Re: Shop Uses for Scuba Tank?

I know about the problem with getting them filled. It makes me wonder what people do when they want tanks of compressed air for things other than scuba. Surely you don't have to get certified in order to have a compressed air tank for a workshop. Tank certification requirements depend on a combinat...
by Magicniner
Fri Aug 23, 2019 12:27 pm
Forum: General Discussion
Topic: Shop Uses for Scuba Tank?
Replies: 16
Views: 2148

Re: Shop Uses for Scuba Tank?

SteveHGraham wrote:
Thu Aug 22, 2019 6:13 pm
They're $250 each new, so I suppose I'll be lucky to get $75 for the pair.
They're old tech and need testing, that gives them a value of approximately tuppence and a balloon :mrgreen:
by Magicniner
Fri Aug 23, 2019 12:25 pm
Forum: General Discussion
Topic: Which end mill to use
Replies: 25
Views: 3530

Re: Which end mill to use

What are the advantages of three flutes vs two or four? Polished TC fast helix 3 flutes are pretty much optimum for ally cutting if your machine has the speed, feed and rigidity to use them, more flutes than 2 allows faster feeds and they don't gum up like a 4 flute will if you run optimum speeds.
by Magicniner
Thu Aug 22, 2019 2:55 pm
Forum: General Discussion
Topic: Which end mill to use
Replies: 25
Views: 3530

Re: Which end mill to use

I use three flute end mills and single flute end mills in Aluminium, all uncoated polished carbide cutters, with flood coolant. Single flute end mills have a helix for chip clearance and are quite easy to sharpen by hand, three flute are better for plunging but for Aluminium spindle speed is king, I...
by Magicniner
Mon Jul 29, 2019 3:29 am
Forum: General Discussion
Topic: Phase converter questions
Replies: 11
Views: 1669

Re: Phase converter questions

There are two kinds of rotary converter. The motor-generator type consists of a synchonous single-phase motor driving a three-phase synchonous generator. It gives you true, separately-derived three-phase power. These are rare. They aren't really rare, it's people willing to buy the best equipment f...
by Magicniner
Mon Jul 29, 2019 3:22 am
Forum: General Discussion
Topic: How to Make a Patient Lift Roll up to Low Machines?
Replies: 38
Views: 7376

Re: How to Make a Patient Lift Roll up to Low Machines?

Google Lifting Sack Truck, lots of very useful options.
I use this one - https://www.ravendo.com/hand-trucks/lif ... -truck-667