[TheForge] Guesstamating

[Roy Wilson]

On Thu, 28 Mar 2002 12:46:16 -0600, Larry wrote:

>Is there a rule of thumb to use when drawing steel as to how much to start with?  For
>instance, say I wish at draw out a taper on a piece of 1 inch round bar to 1/2 inch and wish
>the taper to be 6 inches long.  How much stock should I start with?   This is assuming I wish
>to make more than one, or have two ends of the same stock tapered equally.

 For halving (1" to 0.5") multiply the length of the taper by 1.33.
 IOW, add a third.

  I just happened to know that specific one offhand - what you want
is the equation for volume of a cone, I *believe* (old brain
cells<G>) it's pi times r-squared times length over three.



Roy Wilson
General Operations Director
Zanzibar Internet Land Line Administrator

<Roy@Wilson-Eclectics.com>