[Jewelry making - Article 00402] - Re: [Orchid] Drilling investigated

[Neilthejeweler]

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

>     Is it "better" to drill holes in metal that is hard or annealed? 

    Its better to use a sharp drill 

>     Are there any dangers, such as structural failure, when drilling a
>     piece of metal numerous times? 

    There's a variable point beyond which lies heartache. 

>     Which method is better when enlarging a drilled hole: drill again,
>     using a larger drill bit or using a needle file? 

    Depends. On thin sheet with a really large hole I'd suggest drill
    again slightly under finished size and follow with a suitable bur.
    On thick stock, drill. 

>     Does the same drill bit behave differently with different metals
>     (copper, silver, gold)? 

    Softer metals tend to encourage drifting so a properly done
    centerpunch is essential for a well placed, well formed hole.
____________________________________________________________________
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
____________________________________________________________________