Removing dents from a tuba - video

[Jon]

Removing dents from a tuba. 12:45 video:

Previously:

Machining a brass mouthpiece - video
Brass instrument mouthpiece puller - photo
Brass instrument dent removing tools - photo
Tuba sink - photo

[Toolmaker51]

Reckon dent balls prototype of mandrel benders, except for so many increments.

[Frank S]

Reckon dent balls prototype of mandrel benders, except for so many increments.

Mandrel benders are great for shaping new tubing but completely useless when having to re form tubing that already has compound bends

[that_other_guy]

One thing I found a little frustrating (as a hobby machinist) is that I want all the balls in the case marked for diameter (in thou. or mm equivalent).
I guess this is a case of aesthetics over science.

[nova_robotics]

What's with the haphazard placement of those dent balls in that wooden case? Was the person who made it drunk?

[mklotz]

What's with the haphazard placement of those dent balls in that wooden case? Was the person who made it drunk?

Perhaps he had a high school level understanding of fractions - you know, "3/8 is bigger than 1/2 because 8 is bigger than 2"

Less sarcastically, perhaps each row is for a particular pipe size and all the ball sets were not acquired at the same time so the holder evolved rather than being designed for the complete ensemble.

[nova_robotics]

Perhaps he had a high school level understanding of fractions - you know, "3/8 is bigger than 1/2 because 8 is bigger than 2"

Less sarcastically, perhaps each row is for a particular pipe size and all the ball sets were not acquired at the same time so the holder evolved rather than being designed for the complete ensemble.

I know you're an old fart, but I didn't think senility had set in just yet. Where are those rows you speak of there Marv? Maybe I don't have a high school understanding of fractions, but you don't appear to have a kindergartener's comprehension of drawing a straight line.

[Toolmaker51]

The video rates that job "Hard", on a scale of one each hammer/ screwdriver/ adjustable wrench. Part of that might be selecting pull throughs. Wonder that as different instruments clearly vary in length, they maybe arranged by corresponding taper instead of actual progression of size.
At the same time, very pleased a full set of imperial pin gauges .011-1.000 aren't randomly distributed!

BTW, such pins are available most commonly .0002 under, then .0002 over. They are also graded by accuracy, like gauge blocks. A different type of pins are supplied in each increment on-size, accompanied by .0001's of each.
Next, under higher tolerance requirements, air gauging....

[nova_robotics]

Next, under higher tolerance requirements, air gauging....

I had to search for that. Very cool. I had no idea it existed.