I looked at one of those in a store, and I agree with the above, it is a utter piece of junk....

Unimat used to make pretty decent mini lathes like This one one of those would be perfect for you, or if you can find one of these it would be perfect too...

the closest I found was 6.22mm ID from Here
the nice thing is that this guys sells cut to length, the trouble is they only sell in the USA...

saefroch wrote:
Can PTFE be "safely" melted?

I don't think so...

from Wikipedia:

"According to DuPont, its melting point is 327 °C"

"The pyrolysis of PTFE is detectable at 200 °C (392 °F), and it evolves several fluorocarbon gases"

Labtecpower wrote:
Smartphones are far too fragile for me.

I recently upgraded to a smartphone running android, and while I like the android OS, I do agree with you on this point, these smart phones seems really fragile....

Uhmm I tried polyester resin before, I won't recommend it, it shrinks too much to be useful... besides it is quite brittle so I won't use it where there is significant forces involved...

OK, so if I cut 1 inch off of a 6 feet tube thats able to withstand 500PSI, that 1 inch will be able to withstand 500PSI?! Yes. may I ask what made you think that the length of a tube has any thing to do with the pressure it is able to withstand?? simply put: The length of a tube has nothing to do ...

welcome to the forum

an alloy consisting of magnesium and aluminium is called magnalium. (with your explosive interests you should know, DYI, altough I doubt its functionality in HE's) I'm not sure about the Silicon yet... I think it has something to do with the hardness and strength. this pipe can consist of anything ...

I was going to try something from bronze once, but gave up when I kept getting bubbles in the mold somehow. I think the wax I used was soaking in and not evaporating during the baking phase. your problem was probably caused by incorrect burn-out... either not long enough or not hot enough... 725°C ...

By the way, any ideas on a multi step cast? Make the main body of the ring, then turn any grooves/markings, then rub wax into them, and then cast a different (but compatible) metal into the smaller waxed details? Perhaps engrave deeply under the details to give some security to the additional metal...

saefroch wrote:WISHMASTER!!!!!!!!!! Holy sh*t somebody else listens to Nightwish other than me!

lots of people listens to Nightwish myself included...

well just to give my input on how full of crap the people can be about lasers... 7-8 months ago we where having a LAN at my home and usually when we take a break we BBQ some meat this just happened to be at 12 am so my one friend pulled out his 125mw green laser and started to fool around with it it...

I have a device that you put a normal power drill in which turns it into a drill press, I'm sure you've got several brain cells so you should be able to put something together. / my dad actually built one of those things, my opinion is that it will destroy the bearings in the drill very quickly sin...

Geez man you live in Gauteng and you have a hard time finding things???!! be glad you don't live where I live.... lets just call it the place of great unobtainableity anyhow since I don't actually live in Gauteng aria this is the best I can do... http://www.pneumatron.co.za/ they sell electronics an...