Does Soft Rolled Copper get harder over time

[Ballvalve]

Here is where the morse taper does most of its work:

http://www.victornet.com/subdepartments/HS-Taper-Shank-Drills-Inch/1210.html

And oven cleaner is my private secret to make a sanding belt last 5x longer. Just spray and rinse - all gum is gone. for big belts, 40"x75, say, 3 cleanings saves about $175. Buy dry sodium hydroxide and put it in a well marked and hidden hose sprayer. also essential for saw blades.

 

[Nestork]

nestork - I was studying for a PhD in Electrical Engineering when my Prof stepped on the janitor lady's dust mop one day. When I asked him about it, he said she wasn't "important". I was forced to leave the University after what I said to that guy ... never regretted that!

Kudos to you, Bluebinky.
Someone needed to do that.

 

[Sponsor]

 

[Ballvalve]

should have sprayed him with sodium hydroxide

 

[Bluebinky]

The prof was a nice guy who went on to become a multi-millionaire CEO of several start-up companies.

He's not a bad guy, but just like so many other people who think that being a doctor/nurse/lawyer/professor/engineer/physicist/technician/whatever makes you somehow smarter and better than everyone else.

If you bother to look deep enough, most fields are respectable and way more involved than they appear.

For example, my dad was a freight train engineer (driver) for 51 years. I'm still trying to figure out some of the stuff he did.