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#2 slide trigger range stop screw
Posted: Mon Feb 06, 2023 8:41 pm
by bloke
Since my F cimbasso only has 5-valves, I have mounted a #2 slide trigger (for 5234 "low" G, and 2-4 F-sharp and B).
I've got this crappy steel 8-32 "stove bolt" screw mounted on it, to control one end of its tuning range (fwiw: how far IN the slide is allowed to retract).
Needless to say, it looks like crap.
What is NEEDED is one of these, but I've never seen them offered with more than one inch of threads (and I need
two inches of threads)...
EVENTUALLY, I'm going to REMEMBER (when buying from McMaster-Carr) to buy some BRASS 8-32 all-thread AND a brass 8-32 knurled nut.
I can braze or solder them together, cut the treads off at two inches, and have what I want.
ANOTHER "nice touch" would be to mount an ACTUAL spring, rather than a "BMB"-ish rubber band.
Re: #2 slide trigger range stop screw
Posted: Tue Feb 07, 2023 12:02 am
by Kirley
viewtopic.php?t=5707
@Rick Denney
Seems like the perfect match.
Re: #2 slide trigger range stop screw
Posted: Tue Feb 07, 2023 8:13 am
by bloke
That would be wonderful
, but the solution above is so easy that it would seem to be "a project for a project's sake".
Re: #2 slide trigger range stop screw
Posted: Tue Feb 07, 2023 10:24 am
by Rick Denney
bloke wrote: ↑Tue Feb 07, 2023 8:13 am
That would be wonderful
, but the solution above is so easy that it would seem to be "a project for a project's sake".
And lessee--threading, a shaped groove, knurling...yup. But I bet I'd have to make a couple before getting a good one. :)
Rick "and my knurling tool has the wrong pattern for tuba stuff--need a new one" Denney
Re: #2 slide trigger range stop screw
Posted: Tue Feb 07, 2023 10:32 am
by bloke
There are also different speeds and cut rates for various types of metals.
That stuff can be found in books, but reinforced/refined via experience.
Re: #2 slide trigger range stop screw
Posted: Tue Feb 07, 2023 3:27 pm
by Rick Denney
bloke wrote:There are also different speeds and cut rates for various types of metals.
That stuff can be found in books, but reinforced/refined via experience.
That’s the easy part. I’d grind some high-speed-steel tools for that, and probably cut threads with a die. I’d need a scissors knurler, though. My front knurler would break a part that small.
Rick “brass is free-machining” Denney
Re: #2 slide trigger range stop screw
Posted: Tue Feb 07, 2023 4:47 pm
by bloke
Rick Denney wrote: ↑Tue Feb 07, 2023 3:27 pm
bloke wrote:There are also different speeds and cut rates for various types of metals.
That stuff can be found in books, but reinforced/refined via experience.
That’s the easy part. I’d grind some high-speed-steel tools for that, and probably cut threads with a die. I’d need a scissors knurler, though. My front knurler would break a part that small.
Rick “brass is free-machining” Denney
yes...but (again) too easy to make from two inexpensive available items...
Re: #2 slide trigger range stop screw
Posted: Wed Feb 08, 2023 10:15 pm
by York-aholic
Rick Denney wrote: ↑Tue Feb 07, 2023 3:27 pm
That’s the easy part. I’d grind some high-speed-steel tools for that, and probably cut threads with a die. I’d need a scissors knurler, though. My front knurler would break a part that small.
Rick “brass is free-machining” Denney
@Rick Denney I’d just like to say, it’s good to see you posting again.
