Re: 1/4-20 thread?

From: Doug Bucci (
Date: Wed Mar 24 1999 - 05:57:15 EET

In response to you & Ray Brandes, I want to build both the male & female
threads in my jewelry
that will eliminate my need for commercial hardware & fasteners.
I am also interested in why you are dissatisfied with the your result of
building threads in SLS?

Thanks Again-
Douglas Bucci

PS-I would like to thank everyone for their responses.

My MFA exhibition:

-----Original Message-----
From: will pattison <>
To: 'Ray Brandes' <>; Doug Bucci <>
Cc: <>
Date: Tuesday, March 23, 1999 12:41 PM
Subject: RE: 1/4-20 thread?

>i doubt you'll be satisfied with the result making this thread directly.
> other than with sanders and maybe actua, you will have a hard time
>creating this thread in any rp machine.
>you didn't say if it was male or female, but either way, i would recommend
>a secondary process. if it's female, model in a pilot hole, then drill and
>tap post-build. sls nylon materials machine very well, so you should have
>no problem.
>will pattison
>product development engineer
>4d design
>-----Original Message-----
>From: Ray Brandes
>Sent: Tuesday, March 23, 1999 9:49 AM
>To: Doug Bucci
>Subject: Re: 1/4-20 thread?
>I assume it is a 60deg V thread, but is it male or female? What class?
>Make the male body .25" diameter to the theoretical sharp point then
>remove .001 to .002 from the diameter.
>Make the female the same .25" to the theoretical sharp but add .001 to
>.002 to this.
>Does it have to fit an existing part? Can you make it heavy and then run
>a tap or die on it?
>Doug Bucci wrote:
>> Hello, I need to create a 1/4-20 thread in SLS can anyone provide me
>> with the minimum tolerances for creating this? Thank you,Douglas Bucci
> << File: ATT00002.html >>

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