On Wed, 26 Oct 2011 01:06:48 -0500, Richard
wrote:

On 10/26/2011 12:13 AM, Gunner Asch wrote:
On Tue, 25 Oct 2011 20:50:34 -0400, lid wrote:

Competitive Cyclist Reviews SRAM XX Dome Cassette:

http://www.youtube.com/user/competit...98/ki24L0UHaEE

Video says this takes 9 hours to completely machine. That has got to
be a real piece of programming and a tricky batch of tooling.
Beautiful part though.
Dave

Thats hardly a 9 hour part. Unless the guys are doing it with a manual
mill. In fact..on any modern machine..Id be surprised if it took 30
minutes at most.

Just a 4th axis and a pair of custom vise "jaws" and off you go.

Might be better to rough on a lathe, then do the detail work on a mill.


Gunner



I dunno, babe.
Did you catch the taper on the teeth?
Not just the recurved profile, but the Z axis taper?
It looked different facial/distal.

And all the undercutting to remove so much of the weight.

I seriously doubt that was done by hand...


How many cutters do you need with that taper ground into them? I have a
guy who does form tooling very very nicely.

Gunner

One could not be a successful Leftwinger without realizing that,
in contrast to the popular conception supported by newspapers
and mothers of Leftwingers, a goodly number of Leftwingers are
not only narrow-minded and dull, but also just stupid.
Gunner Asch