[Jewelry making - Article 00602] - Re: [Orchid] Instruction Guild for Rolling Mills

[Durston Rolling Mills]

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


>          Don't know what kind of mill you have but Cavallin recommends
>     that both rollers be reconditioned at the same time. You can take
>     them to a machine shop and ask that both rollers be ground exactly
>     the same amount, then case-hardened to 0.040"  (40 thousandths). 

    Elaine, Noel and all, If you were to take your rollers to a machine
    shop, give them specific instructions that main part of roll must run
    true with bearing journals. Normally between 1 and 10 thou taken off
    will clean up all marks and as Elaine advised both rolls need to be
    done so that the diameters are the same. However, with respect, you
    would not need to re-harden the rolls after taking this small amount
    off. 

    You would not be able to re-harden after grinding in any case - roll
    will turn black, roll will distort, roll will probably crack. Plus
    the fact that special hardening processes is involved (will not go
    into it now) and it would be very difficult to find a company to do
    this even if it were possible. (would possibly cost more than a
    Rolling Mill). Also, a hardness depth of 0.040" would not be deep
    enough to protect the much softer sub surface, which would collapse
    under pressure. 

    Sara has asked me to mention (as Janice did last week) that we now
    have our detailed instruction manual for Rolling Mills on our website
    www.durston.com. This can be viewed online or can be downloaded in
    pdf format. One reason we put this online is due to the large
    response we had from Orchid earlier on in the year, offering our
    instruction manual via post. Also included in this is some techniques
    of jewellery manufacturing which we have reproduced by kind
    permission of Sandra Noble Goss. 

Craig Martin
Technical Division

____________________________________________________________________
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
____________________________________________________________________