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Preventing Cracking BA's
Posted: Sat Oct 03, 2015 10:55 pm
by benjaminh
Hi everyone,
I've read that you stop a BA from continuing to crack by drilling a small hole at the base of the crack. Where do you drill this hole? On the tapered end of the cylinder?
Re: Preventing Cracking BA's
Posted: Sat Oct 03, 2015 11:24 pm
by 52089
You drill the small hole right through the celluloid at the narrow end of the crack itself.
"Compleat Talking Machine" (5th edition) describes this on p. 79.
Re: Preventing Cracking BA's
Posted: Sun Oct 04, 2015 12:02 am
by benjaminh
So the hole is drilled parallel to the playing surface?
Re: Preventing Cracking BA's
Posted: Sun Oct 04, 2015 12:25 am
by winsleydale
Drill it like this. The idea is that if you put a hole at the end of the crack, then the round edge of the hole resists further splitting better than the sharp corner which remains if you don't drill it. It's the same idea that keeps pen nibs from splitting.
The picture is very basic, but I think it illustrates far better than words can.
Re: Preventing Cracking BA's
Posted: Mon Oct 05, 2015 9:26 am
by benjaminh
Thanks so much