[Jewelry making - Article 00315] - Re: [Orchid] What the Rolling Mill is About

[Gary]

========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

>     ...snip but the rolling mill lets me start with just the right size
>     for the job I'm doing - not just 10 gauge, 12 gauge, etc., but
>     12.23456mm by 8.3984785mm - just exactly what I want. 

    Are you serious? Apart from making jewellery I also do model
    engineering with precision machine tools. If I try really hard I can
    almost achieve an accuracy to 3 decimal places of mm (eg. 12.123mm),
    but no chance at all at 4. 

    I believe I'm right (somebody correct me if I'm not) in saying that
    a 2" diam 12" long steel bar, when held horizontally by one end, the
    other end will sag approx 0.0001" under its own weight. 

    A 1" gold rod at room temperature will change its length by
    0.000014" for each temperature change of 1 degree C. 

    Since 0.00001mm = 0.00000039", do you really think you can work to
    at least half a millionth of an inch, with a rolling mill? :-) 

Regards, Gary Wooding
____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________