Help! > Mistakes, muckups, and dangerous behaviour

Small broken taps blind hole fix easy

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Jo:
It is always good practise to use a nice sharp tap when cutting bronze castings. Bronze grabs drills and snaps old taps  :toilet_claw:

To an extent that it is worth using a fractional bigger tapping hole in bronze as well as plenty of lubricant.

Jo

crueby:
For bronze bar stock, I much prefer working with the Bearing Bronze alloys, the Silicon Bronze is really sticky stuff as Jo mentioned. For castings, not much choice!

mcostello:
There are at least 4 different kinds of alum. Make sure You get the right kind.
I left an aluminum part on the wood stove for a couple of days till i found it out.

Admiral_dk:

--- Quote ---There are at least 4 different kinds of alum. Make sure You get the right kind.
--- End quote ---

Do you happen to know the Chemical Formula for the correct/good one - it would help other tremendously in locating the right stuff  ;)

Per       :cheers:

uuu:
Here's a Wiki article on the stuff:  https://en.wikipedia.org/wiki/Potassium_alum

Wilf

Edit: and an article on all alums, including the wrong ones: https://en.wikipedia.org/wiki/Alum

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