Search found 518 matches
- Fri Nov 29, 2019 12:39 pm
- Forum: General Discussion
- Topic: Rough cuts first?
- Replies: 3
- Views: 373
Re: Rough cuts first?
Roughing cuts are to remove a large amount of material quickly before finishing, if they cause issues with flex or resonance it's either not appropriate for the job or alternate tooling/techniques are required. I make a Titanium part which reqires a 2" length of 1/4" material to be reduced to just o...
- Sun Oct 27, 2019 4:14 am
- Forum: General Discussion
- Topic: Dead Buffer Starter
- Replies: 15
- Views: 2133
Re: Dead Buffer Starter
Put it back! It was a safety device to reduce the risks involved in using such a dangerous bit of equipment.
- Tue Oct 01, 2019 11:44 am
- Forum: General Discussion
- Topic: Harbor Freight 6000-Pound Lift Thoughts
- Replies: 27
- Views: 5814
- Mon Sep 30, 2019 3:30 am
- Forum: General Discussion
- Topic: Huanyang VFD 2.2
- Replies: 14
- Views: 3104
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.
- Fri Sep 06, 2019 11:03 am
- Forum: General Discussion
- Topic: Re heat treating mild steel
- Replies: 18
- Views: 3470
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.
- Mon Sep 02, 2019 12:08 pm
- Forum: General Discussion
- Topic: Re heat treating mild steel
- Replies: 18
- Views: 3470
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...
- Sat Aug 31, 2019 11:00 am
- Forum: General Discussion
- Topic: Re heat treating mild steel
- Replies: 18
- Views: 3470
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 ...
- Fri Aug 30, 2019 2:48 pm
- Forum: General Discussion
- Topic: Re heat treating mild steel
- Replies: 18
- Views: 3470
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.
- Thu Aug 29, 2019 8:30 am
- Forum: General Discussion
- Topic: Shop Uses for Scuba Tank?
- Replies: 16
- Views: 2880
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...
- Fri Aug 23, 2019 12:27 pm
- Forum: General Discussion
- Topic: Shop Uses for Scuba Tank?
- Replies: 16
- Views: 2880
Re: Shop Uses for Scuba Tank?
They're old tech and need testing, that gives them a value of approximately tuppence and a balloonSteveHGraham wrote: ↑Thu Aug 22, 2019 6:13 pmThey're $250 each new, so I suppose I'll be lucky to get $75 for the pair.

- Fri Aug 23, 2019 12:25 pm
- Forum: General Discussion
- Topic: Which end mill to use
- Replies: 25
- Views: 5119
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.
- Thu Aug 22, 2019 2:55 pm
- Forum: General Discussion
- Topic: Which end mill to use
- Replies: 25
- Views: 5119
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...