Scary Stuff

[handlewanker]

Hi, I just deleted heather858 without opening it......recognised the SPAM signature as soon as it appeared on my email.
Ian.

[skippy]

Here's one that happened to me almost 30 years ago back when power tools (saws, angle grinders, etc.) didn't have those safety trigger mechanisms that they have now. In this case it was a 9" angle grinder which back then they all had a switch/trigger which could be locked on. Anyway I grabbed the 9" angle grinder from our tool store, sat it on the ground (disc facing downwards), reached up and plugged it in to the suspended power lead (permanent type, suspended with a light chain) and hey presto... it had been left on (locked on) and therefore went into action (full speed) whilst moving about due to the vibration of the motor, right next to my two feet. I went into "disco dancing" mode trying to avoid the thing and was able to rip the cable out of the lead soon after.
I'll never forget that one!

[Al_The_Man]

Something really scary happened to me the other day. Once I got the new bit on I noticed this slight buzzing sound. I zeroed in on it and realized it was coming from the router! It was ON! and my fingers were holding the bit! I toggled the power switch to the OFF position and then back on and the router fired up as normal.

All commercial CNC router are, or should be fitted with a relay operated by the E-Stop, I would suspect that the many DIY tables just have the router plugged into a socket and use the router to turn on/off and to change bits.
A double pole relay is one good safety solution and I would suggest a D.P. power relay to switch both hot and neutral.
Al.

[RCaffin]

Carbide is always harder than hardened steel ...

I am going to have to disagree here. German& Swedish carbide, yes, good stuff. But have you tried Chinese carbide?

I have seen carbide cutters rated for HRC32, HRC40, HRC45, HRC50, HRC55 and HRC63. Not quite all the same!

I have seen (and have bought) Chinese carbide cutters sold for use on wood, plastic and aluminium. I have checked with the supplier and been told that these are not for use on steel.

I have tried using some of these cheap Chinese cutters on steel, just as an experiment, and the corners quickly chipped off. Yes, they are OK on aluminium and plastic. No, they are not OK on steel.

I saw a price list for cutters on one web site. As I remember, the site was selling a large range of cutters with pricing roughly as follows for one size:
Chinese carbide: $4
Taiwanese carbide: $6
German carbide: $12
Swedish carbide: $16

No, oils ain't oils.

Cheers

[ger21]

I have tried using some of these cheap Chinese cutters on steel, just as an experiment, and the corners quickly chipped off. Yes, they are OK on aluminium and plastic. No, they are not OK on steel.

The harder carbide is, the more brittle it is. And the geometry for cutting wood is much different than for cutting steel. Both of these factor into why your cheap tools chipped when cutting steel.
Fwiw, I've accidentally cut steel with very high quality woodworking tooling, and it'll chip just about every time.

[underthetire]

Scary stuff, oh ya. Saw an accident report once, guy was cut in half when a part came out of a VTL. I hate those things, seems like the parts always come toward you when they come out.

[erd39030]

I found this video in youtube,
a boy trying to stop a lathe with bare hands:

http://www.youtube.com/watch?v=0PzPfzLeDa0&feature=related]I fought the Lathe and the lathe won - YouTube

He was lucky

[bobsch]

Lucky? I'd say stupid.

[arie kabaalstra]

No.. i'd say he's lucky.. lucky that i'm not his teacher.. i'd kick 'm in the "familiy jewels" if i'd had seen him doing that..

[handlewanker]

What was the guy doing on that side of the lathe?.....looks like a set-up to "wow" the Utubers.......the camera was waiting for the "accident" to happen.....dumb arse trick.
Ian.

[epineh]

If that lathe was a bit bigger he would have been a candidate for a Darwin award...and a well deserved one at that !

[RCaffin]

dumb arse trick.

Spam I think. Delete?

Cheers