1983 50 cent

[r9453]

I was reading about 'bubbles', MattGold's thread. I googled a bit but didn't find much. Anyway the very same day I found this:



To me it's like a volcano, raised above the field but with a crater in the centre:



:imnewhere: please explain.

Go NSW Blues :off_topic:

[Fordprefect]

I'm seeing Centre Punch prior to drilling a hole. :idea:
Does the reverse show any impact area ?

As to the second part, from NSW but
don't give a toss. :angel:

[robbiegal]

thought the footy was on tonight
go the maroons

[r9453]

I'm seeing Centre Punch prior to drilling a hole. :idea:
Does the reverse show any impact area ?

As to the second part, from NSW but
don't give a toss. :angel:

Does the reverse show any impact area?
Not really, I can post a pic. I see what you mean by centre punch strike prior to drilling. Why not place it directly at 12 o'clock? :-/

As to the second part, :dodgy:

[Fordprefect]

Does the reverse show any impact area?
Not really, I can post a pic. I see what you mean by centre punch strike prior to drilling.
Why not place it directly at 12 o'clock? :-/

Probably did on the next one. :yahoo:

The cupro's are very tough little critter.
I've made up a few 3/8" washers from 20c coins
Hell of whack to get the centre punch right
and tough as hell to drill a hole.

[r9453]

:ok: I get it Ford, I'm used to centre-punching steel before drilling but cupro is a different kettle.

Btw,
Go NSW Blues :off_topic:

[robbiegal]

you guys have it sorted by the sounds of things

psssst
go the maroons :drinks:

[JeffH]

I've never tried to cut a cupro-nickel coin but know that aluminium and brass clog an angle grinder wheel very quickly. I suspect coins would be similar.

[Fulvio]

If it were a strikethrough, the bottom wouldn't be smooth, and there wouldn't be a raised crater around it. So yeah, PMD. But you knew that already. :angel:

[r9453]

"But you knew that already."
Nope, I didn't know  that.