Can someone tell me the difference between the type of drill bits, i.e.
Gold, Cobalt, Titanium, and Black-Oxide.
Also what does Metal index mean?

thanks for your help

john

Coltrane wrote:
| Can someone tell me the difference between the type of drill bits,
| i.e. Gold, Cobalt, Titanium, and Black-Oxide.
| Also what does Metal index mean?

A drill index is a small "rack" that holds drill bits. It may be a
hinged box, or it may just be a bar with holes in it. A metal index is
a drill index made out of sheet metal (the alternative is plastic)
with a (typically) hinged lid.

Those aren't really types of drill bits - the adjectives refer to
coatings or finishes applied to drill bits. If the bits are for
woodworking, my recommendation would be to not spend extra for any of
them. If they're for metalworking, I'd suggest asking over in
rec.crafts.metalworking

Types of woodworking bits include spade, Forstner, brad-point,
tapered, and standard twist bits. If you browse a catalog sales web
site (like www.leevalley.com), you can see photos and find a bit about
the attributes of each.

HTH

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/solar.html

"Coltrane" wrote in message
ps.com...
Can someone tell me the difference between the type of drill bits, i.e.
Gold, Cobalt, Titanium, and Black-Oxide.
Also what does Metal index mean?

thanks for your help

john


The difference in the types of coatings is how hard the surface is and
generally how long the bit will remain sharp. Typically when all types are
brand new you will not see a difference in how they cut.
Additionally these types bits, as Morris has pointed out, are for cutting
metals.
You want wood bits for more precision and cleaner cuts in wood.

Thanks for everyone's feedback.
I guess I did mean coating rather than type. I just kept seeing Gold,
Titanium, etc, and I didn't know the difference. Now I understand that
for wood working I do not have pay extra for these type of coatings.

well I'm off to the store

cheers

Leon wrote:
"Coltrane" wrote in message
ps.com...
Can someone tell me the difference between the type of drill bits, i.e.
Gold, Cobalt, Titanium, and Black-Oxide.
Also what does Metal index mean?

thanks for your help

john


The difference in the types of coatings is how hard the surface is and
generally how long the bit will remain sharp. Typically when all types are
brand new you will not see a difference in how they cut.
Additionally these types bits, as Morris has pointed out, are for cutting
metals.
You want wood bits for more precision and cleaner cuts in wood.

On Tue, 16 Jan 2007 06:34:33 -0800, Coltrane wrote:

Thanks for everyone's feedback.
I guess I did mean coating rather than type. I just kept seeing Gold,
Titanium, etc, and I didn't know the difference. Now I understand that
for wood working I do not have pay extra for these type of coatings.

well I'm off to the store

cheers

Leon wrote:
"Coltrane" wrote in message
ps.com...
Can someone tell me the difference between the type of drill bits, i.e.
Gold, Cobalt, Titanium, and Black-Oxide.
Also what does Metal index mean?

thanks for your help

john


The difference in the types of coatings is how hard the surface is and
generally how long the bit will remain sharp. Typically when all types are
brand new you will not see a difference in how they cut.
Additionally these types bits, as Morris has pointed out, are for cutting
metals.
You want wood bits for more precision and cleaner cuts in wood.

I would be very surprised if the titanium nitride coated Forstners that
Woodcraft had reduced to 10 bucks a set around Christmas were intended for
use on metal.

--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)

funny,

john was

jprok at eye be em dot net


J. Clarke wrote:
On Tue, 16 Jan 2007 06:34:33 -0800, Coltrane wrote:

Thanks for everyone's feedback.
I guess I did mean coating rather than type. I just kept seeing Gold,
Titanium, etc, and I didn't know the difference. Now I understand that
for wood working I do not have pay extra for these type of coatings.

well I'm off to the store

cheers

Leon wrote:
"Coltrane" wrote in message
ps.com...
Can someone tell me the difference between the type of drill bits, i.e.
Gold, Cobalt, Titanium, and Black-Oxide.
Also what does Metal index mean?

thanks for your help

john


The difference in the types of coatings is how hard the surface is and
generally how long the bit will remain sharp. Typically when all types are
brand new you will not see a difference in how they cut.
Additionally these types bits, as Morris has pointed out, are for cutting
metals.
You want wood bits for more precision and cleaner cuts in wood.

I would be very surprised if the titanium nitride coated Forstners that
Woodcraft had reduced to 10 bucks a set around Christmas were intended for
use on metal.

--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)

funny,

john was

jprok at eye be em dot net


J. Clarke wrote:
On Tue, 16 Jan 2007 06:34:33 -0800, Coltrane wrote:

Thanks for everyone's feedback.
I guess I did mean coating rather than type. I just kept seeing Gold,
Titanium, etc, and I didn't know the difference. Now I understand that
for wood working I do not have pay extra for these type of coatings.

well I'm off to the store

cheers

Leon wrote:
"Coltrane" wrote in message
ps.com...
Can someone tell me the difference between the type of drill bits, i.e.
Gold, Cobalt, Titanium, and Black-Oxide.
Also what does Metal index mean?

thanks for your help

john


The difference in the types of coatings is how hard the surface is and
generally how long the bit will remain sharp. Typically when all types are
brand new you will not see a difference in how they cut.
Additionally these types bits, as Morris has pointed out, are for cutting
metals.
You want wood bits for more precision and cleaner cuts in wood.

I would be very surprised if the titanium nitride coated Forstners that
Woodcraft had reduced to 10 bucks a set around Christmas were intended for
use on metal.

--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)

I much prefer to buy HSS (High Speed Steel) when it comes to wood working
drill bits.
Today, it is a little hard to buy HSS bits and cutters. Most big Boxes
stores offer mild steel coated with cobalt and titanium.
To learn the difference I made tests with HSS bits from Lee Valley and
titanium coated bits from Busy Bees.
It like day and night. Carbide bits are good for concrete. When buying
router bits quality carbide is superior to HSS.
FWIW

"Coltrane" wrote in message
oups.com...
funny,

john was

jprok at eye be em dot net


J. Clarke wrote:
On Tue, 16 Jan 2007 06:34:33 -0800, Coltrane wrote:

Thanks for everyone's feedback.
I guess I did mean coating rather than type. I just kept seeing Gold,
Titanium, etc, and I didn't know the difference. Now I understand that
for wood working I do not have pay extra for these type of coatings.

well I'm off to the store

cheers

Leon wrote:
"Coltrane" wrote in message
ps.com...
Can someone tell me the difference between the type of drill bits,
i.e.
Gold, Cobalt, Titanium, and Black-Oxide.
Also what does Metal index mean?

thanks for your help

john


The difference in the types of coatings is how hard the surface is and
generally how long the bit will remain sharp. Typically when all
types are
brand new you will not see a difference in how they cut.
Additionally these types bits, as Morris has pointed out, are for
cutting
metals.
You want wood bits for more precision and cleaner cuts in wood.

I would be very surprised if the titanium nitride coated Forstners that
Woodcraft had reduced to 10 bucks a set around Christmas were intended
for
use on metal.

--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)