flat bottom forstner bits
 

saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

flat bottom forstner bits
 

On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.

flat bottom forstner bits
 

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


That's exactly what I've done when I need a totally flat bottom hole.


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com

---remove "DOT" ^^^^ to reply

flat bottom forstner bits
 

On 3/28/2016 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


Actually a true Forster bit has no saw teeth and does not require a
center brad point to guide it. I have drilled numerous quarter circle
holes with only 1/4 of the bit cutting into the wood. The perimeter of
the bit does the guiding. This is all done however with a DP, not a
hand held drill.

flat bottom forstner bits
 

Electric Comet wrote:

saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder

Yes true Forster bits drill flat bottom holes. They also leave a small
dimple and often an indention around the perimeter of the bottom of the
hole, but the bottom is flat.

flat bottom forstner bits
 

-MIKE- wrote in :

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


That's exactly what I've done when I need a totally flat bottom hole.

I'm curious why you would need a totally flat bottomed hole.

flat bottom forstner bits
 

On Tuesday, March 29, 2016 at 12:09:23 AM UTC-4, Leon wrote:
On 3/28/2016 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


Actually a true Forster bit has no saw teeth and does not require a
center brad point to guide it. I have drilled numerous quarter circle
holes with only 1/4 of the bit cutting into the wood. The perimeter of
the bit does the guiding. This is all done however with a DP, not a
hand held drill.

Like this one...no center point.

http://www.jamestowndistributors.com...=Forstner+Bits

flat bottom forstner bits
 

On 3/29/2016 6:12 AM, Doug Miller wrote:
-MIKE- wrote in :

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


That's exactly what I've done when I need a totally flat bottom hole.

I'm curious why you would need a totally flat bottomed hole.



If you are using a bolt/nut/screw and flat washer in that hole the
washer makes better contact with the bottom of the hole.

flat bottom forstner bits
 

On 3/29/2016 9:40 AM, Leon wrote:
On 3/29/2016 6:12 AM, Doug Miller wrote:
-MIKE- wrote in :

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit.
Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


That's exactly what I've done when I need a totally flat bottom hole.

I'm curious why you would need a totally flat bottomed hole.



If you are using a bolt/nut/screw and flat washer in that hole the
washer makes better contact with the bottom of the hole.

But the emphasis (as I read it) was why a TOTALLY flat bottomed hole? I
understand what you're saying, Leon, but if I'm using ANY Forstner bit
to drill say, a 1" hole in a board so I can insert a small fender washer
and a bolt or screw what difference will that slight pip in the dead
center make? If it's a screw the pilot hole will be there, if it's a
bolt, there will be a hole rather than the pip.

flat bottom forstner bits
 

On Tuesday, March 29, 2016 at 10:40:57 AM UTC-4, Leon wrote:
On 3/29/2016 6:12 AM, Doug Miller wrote:
-MIKE- wrote in :

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


That's exactly what I've done when I need a totally flat bottom hole.

I'm curious why you would need a totally flat bottomed hole.



If you are using a bolt/nut/screw and flat washer in that hole the
washer makes better contact with the bottom of the hole.

....or a thrust bearing. BTDT

http://www.vxb.com/v/vspfiles/photos/F3-8-2.jpg

There's one at the bottom of the steering shaft for this
Soap Box Derby car:

http://tinyurl.com/DerbySteer

Full Link

http://i440.photobucket.com/albums/q...psi9pjxbgv.jpg

However, I think we have a slight disconnect here. Doug used the word
"totally" in his post. Your flat washer (and my bearing) will both work
in the hole created by a Fortsner bit with a center point, which does not
create a totally flat hole. (I believe that that is what EC is actually
asking about)

The only reason I can think of for a totally flat bottomed hole would be
for decorative purposes.

flat bottom forstner bits
 

On Tue, 29 Mar 2016 07:13:30 -0700, DerbyDad03 wrote:

On Tuesday, March 29, 2016 at 12:09:23 AM UTC-4, Leon wrote:

Actually a true Forster bit has no saw teeth and does not require a
center brad point to guide it. I have drilled numerous quarter circle
holes with only 1/4 of the bit cutting into the wood. The perimeter of
the bit does the guiding. This is all done however with a DP, not a
hand held drill.

You're right, Leon. But I would add one caution. If you're drilling a
full round hole, the force of the bit is equal in all directions. If
you're drilling half a hole, the force is all in one direction. If you
don't have the work secured, the bit can pull the work (and your hand)
into it - DAMHIKT!


Like this one...no center point.

http://www.jamestowndistributors.com...ow_product.do?
pid=12353&familyName=Forstner+Bits

They're really fond of those bits aren't they? Four times or more the
price of a Freud or Bosch with a center point!


--
Nobody expects the Spanish Inquisition!

flat bottom forstner bits
 

On 3/29/16 6:12 AM, Doug Miller wrote:
-MIKE- wrote in
:

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet
wrote:
saw flat bottom forstner bits advertised and first thing i
thought of was all forstner bits are flat bottom but i wonder
if that is true

It's not true. I would guess that most Forstner bits are *not*
flat bottomed, as shown here. The center brad is used to get the
bit started without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2
Forstner bits to get a flat bottom hole. Grind the center brad
off of one bit. Start the hole with the center brad of the "full"
bit and when the hole gets deep enough to hold the other one
centered, switch bits and finish the hole.


That's exactly what I've done when I need a totally flat bottom
hole.

I'm curious why you would need a totally flat bottomed hole.


I'm letting some coffee work on my brain to fire up the correct synapses
in order to recollect the past projects I've needed them.

However, on a recent cabinet rehab, the client wanted cup hinges on her
existing doors which were abnormally thin. Not only did I have to scour
the globe/google to find euro-hinges with the shallowest cups, but I had
to grind off the pilot point on my 35mm forstner to keep it from
piercing the outer edge of the cabinet.

Yes, it was a butt-pucker job as there was less than 1/16" outer veneer
left after the cup holes were drilled. Client wants, client gets. :-)


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com

---remove "DOT" ^^^^ to reply

flat bottom forstner bits
 

On 3/29/16 9:56 AM, Unquestionably Confused wrote:
On 3/29/2016 9:40 AM, Leon wrote:
On 3/29/2016 6:12 AM, Doug Miller wrote:
-MIKE- wrote in :

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit
started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner
bits
to get a flat bottom hole. Grind the center brad off of one bit.
Start the
hole with the center brad of the "full" bit and when the hole gets
deep
enough to hold the other one centered, switch bits and finish the
hole.


That's exactly what I've done when I need a totally flat bottom hole.

I'm curious why you would need a totally flat bottomed hole.



If you are using a bolt/nut/screw and flat washer in that hole the
washer makes better contact with the bottom of the hole.

But the emphasis (as I read it) was why a TOTALLY flat bottomed hole? I
understand what you're saying, Leon, but if I'm using ANY Forstner bit
to drill say, a 1" hole in a board so I can insert a small fender washer
and a bolt or screw what difference will that slight pip in the dead
center make? If it's a screw the pilot hole will be there, if it's a
bolt, there will be a hole rather than the pip.



I'm trying to find some pictures for one project I did.
It's more for looks than purpose. I needed semi-cylindrical shapes,
think: round mortise.
Except these would show. I could think of no easier or accurate way to
cut the shapes I needed. I experiment with a hole saw, first. But they
don't exactly cut clean holes, then there's the task of removing the
core that's still attached on a non-through bore. That means having
chisel out a clean, flat bottom inside a semi-circle. Not easy.

So that gets us to the subject of this thread. :-)


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com

---remove "DOT" ^^^^ to reply

flat bottom forstner bits
 

On 2016-03-29, Trenbidia wrote:

They're really fond of those bits aren't they? Four times or more the
price of a Freud or Bosch with a center point!

.....and to what advantage!?

So, a center point leaves a little dimple at the bottom of the cut.
How is this detrimental to the flat bottom? I could see the added
expense of pointless bits if the bit point left a protruding dimple on
the bottom, but it does not. A flat washer will lay jes as flat with
a negative dimple under it as without. Or am I missing something? ;)

nb

flat bottom forstner bits
 

On 3/29/2016 9:56 AM, Unquestionably Confused wrote:
On 3/29/2016 9:40 AM, Leon wrote:
On 3/29/2016 6:12 AM, Doug Miller wrote:
-MIKE- wrote in :

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit
started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner
bits
to get a flat bottom hole. Grind the center brad off of one bit.
Start the
hole with the center brad of the "full" bit and when the hole gets
deep
enough to hold the other one centered, switch bits and finish the
hole.


That's exactly what I've done when I need a totally flat bottom hole.

I'm curious why you would need a totally flat bottomed hole.



If you are using a bolt/nut/screw and flat washer in that hole the
washer makes better contact with the bottom of the hole.

But the emphasis (as I read it) was why a TOTALLY flat bottomed hole? I
understand what you're saying, Leon, but if I'm using ANY Forstner bit
to drill say, a 1" hole in a board so I can insert a small fender washer
and a bolt or screw what difference will that slight pip in the dead
center make? If it's a screw the pilot hole will be there, if it's a
bolt, there will be a hole rather than the pip.



Totally flat does not mean every spot on the bottom is solid, it simply
means that the bottom is flat. Even though pegboard has holes in it, it
is flat.


If there is any portion that is not flat the washer will not make full
contact, if the bottom funnels toward the center the fastener head can
deflect the washer and then only the edge/perimeter of the fastener head
is making contact. Why is this a problem? The fastener can loosen over
time. Now this is all being picky but flat bottom for these type flat
washers and fasteners need to be flat for the same reasons that you use
a tapered type countersink with flat head screws. It simply distributes
the load of the fastener more evenly.

And just to add a touch for the benefit if a flat bottom hole is when
you are drilling 35mm/1-3/8" diameter holes for Euro hinges. These
style hinges require a 1/2" deep hole. If you drill a 1/2" deep hole in
a 3/4" thick cabinet door with a spade bit or a huge twist type bit you
will certainly drill through the opposite surface of the stile.

flat bottom forstner bits
 

On 3/29/2016 10:02 AM, DerbyDad03 wrote:
On Tuesday, March 29, 2016 at 10:40:57 AM UTC-4, Leon wrote:
On 3/29/2016 6:12 AM, Doug Miller wrote:
-MIKE- wrote in :

On 3/28/16 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


That's exactly what I've done when I need a totally flat bottom hole.

I'm curious why you would need a totally flat bottomed hole.



If you are using a bolt/nut/screw and flat washer in that hole the
washer makes better contact with the bottom of the hole.

...or a thrust bearing. BTDT

http://www.vxb.com/v/vspfiles/photos/F3-8-2.jpg

There's one at the bottom of the steering shaft for this
Soap Box Derby car:

http://tinyurl.com/DerbySteer

Full Link

http://i440.photobucket.com/albums/q...psi9pjxbgv.jpg

However, I think we have a slight disconnect here. Doug used the word
"totally" in his post. Your flat washer (and my bearing) will both work
in the hole created by a Fortsner bit with a center point, which does not
create a totally flat hole. (I believe that that is what EC is actually
asking about)

The only reason I can think of for a totally flat bottomed hole would be
for decorative purposes.


Actually I believe Mike mentioned totally flat. And I thought Doug was
just wondering about a flat bottom hole, NOT necessarily devoid of a
perimeter indention or center point.

My mistake if I misunderstood Doug.

flat bottom forstner bits
 

notbob wrote in :

On 2016-03-29, Trenbidia wrote:

They're really fond of those bits aren't they? Four times or more the
price of a Freud or Bosch with a center point!

....and to what advantage!?

So, a center point leaves a little dimple at the bottom of the cut.
How is this detrimental to the flat bottom? I could see the added
expense of pointless bits if the bit point left a protruding dimple on
the bottom, but it does not. A flat washer will lay jes as flat with
a negative dimple under it as without. Or am I missing something? ;)

nb

Unlike other bits, a Forstner can easily be used to drill multiple
overlapping holes. If a router won't work for some reason, you can make
pockets with a Forstner and a chisel. The little divots left by the
Forstner bit would be very unappealing in that case.

Puckdropper

flat bottom forstner bits
 

On 3/29/2016 11:22 AM, Trenbidia wrote:
On Tue, 29 Mar 2016 07:13:30 -0700, DerbyDad03 wrote:

On Tuesday, March 29, 2016 at 12:09:23 AM UTC-4, Leon wrote:

Actually a true Forster bit has no saw teeth and does not require a
center brad point to guide it. I have drilled numerous quarter circle
holes with only 1/4 of the bit cutting into the wood. The perimeter of
the bit does the guiding. This is all done however with a DP, not a
hand held drill.

You're right, Leon. But I would add one caution. If you're drilling a
full round hole, the force of the bit is equal in all directions. If
you're drilling half a hole, the force is all in one direction. If you
don't have the work secured, the bit can pull the work (and your hand)
into it - DAMHIKT!

Yes! and why I mentioned doing this on a DP. ;~)







Like this one...no center point.

http://www.jamestowndistributors.com...ow_product.do?
pid=12353&familyName=Forstner+Bits

They're really fond of those bits aren't they? Four times or more the
price of a Freud or Bosch with a center point!



Good Forstner bits are not cheap. Cheap Forstner bits can be cheap.

With out a center spur the bit has to be well made and sharpened to keep
it on track. FWIW I would choose a Fuller bit over a Bosch or Freud if
I needed to accomplish an excellent result repeatedly hundreds of times.

flat bottom forstner bits
 

On 3/29/2016 9:13 AM, DerbyDad03 wrote:
On Tuesday, March 29, 2016 at 12:09:23 AM UTC-4, Leon wrote:
On 3/28/2016 8:16 PM, DerbyDad03 wrote:
On Monday, March 28, 2016 at 7:24:38 PM UTC-4, Electric Comet wrote:
saw flat bottom forstner bits advertised and first thing i thought of
was all forstner bits are flat bottom but i wonder if that is true

It's not true. I would guess that most Forstner bits are *not* flat
bottomed, as shown here. The center brad is used to get the bit started
without wandering.

https://www.pennstateind.com/graphic...x/PKFB2732.jpg

I have heard of (but never seen) the technique of using 2 Forstner bits
to get a flat bottom hole. Grind the center brad off of one bit. Start the
hole with the center brad of the "full" bit and when the hole gets deep
enough to hold the other one centered, switch bits and finish the hole.


Actually a true Forster bit has no saw teeth and does not require a
center brad point to guide it. I have drilled numerous quarter circle
holes with only 1/4 of the bit cutting into the wood. The perimeter of
the bit does the guiding. This is all done however with a DP, not a
hand held drill.

Like this one...no center point.

http://www.jamestowndistributors.com...=Forstner+Bits


BUT not even that bit creates a "totally" flat bottom hole, it still
creates an indentation around the perimeter of the bottom of the hole,
and typically about as deep as the spur center on those that have them.

The Forstner bit requires the perimeter of the hole to be cut first,
like a brad point bit and then the flutes cutting edges cut out the
center and leave a flat surface.

flat bottom forstner bits
 

On 3/29/2016 11:44 AM, notbob wrote:
On 2016-03-29, Trenbidia wrote:

They're really fond of those bits aren't they? Four times or more the
price of a Freud or Bosch with a center point!

....and to what advantage!?

So, a center point leaves a little dimple at the bottom of the cut.
How is this detrimental to the flat bottom? I could see the added
expense of pointless bits if the bit point left a protruding dimple on
the bottom, but it does not. A flat washer will lay jes as flat with
a negative dimple under it as without. Or am I missing something? ;)

nb



Ascetics if the hole will not be filled.

flat bottom forstner bits
 

On 2016-03-29, Leon lcb11211@swbelldotnet wrote:


if the bottom funnels toward the center the fastener head can
deflect the washer and then only the edge/perimeter of the fastener head
is making contact. Why is this a problem?

No one but yerself is positing that it even IS a problem.

You say, "if". What "if" it is NOT a problem? I suspect good
forstner bits are jes as flat as those pricey pointless bits, with
only the "point" extending beyond the flat cutter arms. In fact,
if one has a drill press and good HSS bits, what's to prevent one from
grinding down the "point".

According to Wiki, the main advantage to forstner bits was not the
flat bottom:

"Originally the Forstner bit was very successful with gunsmiths
because of its ability to drill an exceedingly smooth-sided hole."

https://en.wikipedia.org/wiki/Drill_bit#Forstner_bits

Yes, I saw the comment about the flat bottom:

"(and incidentally spoils the otherwise flat bottom of the hole)".

Again, I say, who cares? Some anal purist, no doubt, but what with
all those power tools in the mix, it's pretty silly. Besides, don't
washers have a hole in the middle?

I'm rapidly beginning to suspect woodworking is merely yet another
reason for men to buy/hoard a whole buncha specialized tools. I've
got a 1/4" socket paring chisel coming tomorrow, which is amazing only
due to the fact that I have no clue how I'm gonna use it w/o that
necessary wooden mallet.

Yeah, I know. I'm already hooked. ;)

nb

flat bottom forstner bits
 

On 2016-03-29, Puckdropper puckdropper wrote:

The little divots left by the Forstner bit would be very unappealing
in that case.

So, grind the point off!

I know the next power tool I buy will probably be some sorta drill
press. My last DP was too heavy to move from CA to CO. :(

Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact! And, with a drill press,
pilot holes are no longer so important.

nb

flat bottom forstner bits
 

notbob wrote in news:dlvtvuFmn1iU5
@mid.individual.net:

So, grind the point off!

I know the next power tool I buy will probably be some sorta drill
press. My last DP was too heavy to move from CA to CO. :(

Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact! And, with a drill press,
pilot holes are no longer so important.

nb


I put my Forstners in the handheld drill without a second thought. They
do just fine and show very little tendency to grab or do anything crazy.
And hole saws are often used in places where a handheld drill is the only
way to make them work. Even if you could put a door under the drill
press, you'd have to stand on it or something to reach the handles...

I have taken to drilling with the drill/driver clutch set to one notch
below the maximum position. It does help in case of a catch. If I need
more torque, it's easy to flip it over to maximum.

Puckdropper

flat bottom forstner bits
 

On Tuesday, March 29, 2016 at 1:57:22 PM UTC-4, notbob wrote:
On 2016-03-29, Puckdropper puckdropper wrote:

The little divots left by the Forstner bit would be very unappealing
in that case.

So, grind the point off!

I know the next power tool I buy will probably be some sorta drill
press. My last DP was too heavy to move from CA to CO. :(

Things like forstner bits and hole saws should NOT be used with a hand
held drill motor.

May I offer a hardy "Not true!"?

There are so many projects that require the use of a hole saw or
Forstner bit that simply can't be brought to the drill press.

I could list 5 or 6 recent projects that I've done by using
both Forstner bits and hole saws in hand held drills.

flat bottom forstner bits
 

On 3/29/2016 1:57 PM, notbob wrote:


Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact! And, with a drill press,
pilot holes are no longer so important.

nb


Depends on how accurate you want to be. The pin point on the bit makes
it easier to line up with the pencil dot on the board for dead center.
But it does not make a difference in making the hold.

flat bottom forstner bits
 

On 2016-03-29, Puckdropper puckdropper wrote:

I put my Forstners in the handheld drill without a second thought.

The larger the diameter, the greater the problem. Yer arm, yer
choice.

Apparently, I'm still thinking old school metalworking.
I have a 1/2" drive Milwaukee drill motor. Max 400 rpm, so
it's high torque and no clutch. I was cutting concrete with a
homemade 1-1/2" bore cutter bit. The cutter hit an I-beam and the
drill motor tore itself outta my hands (trigger lock on) and didn't
stop until the drill motor had wrapped itself in its own power cord
and ripped the cord completely off the unit.

I have taken to drilling with the drill/driver clutch set to one notch
below the maximum position.

Using a hole saw to make a doorknob hole ina door. I see yer point
about using the hole saw in wood. Never happen in metal. And using a
drill motor with a clutch? Never thought of that, until you mentioned
it. I have a DeWalt portable drill motor w/ clutch, so great tip.
Thnx. ;)

nb

flat bottom forstner bits
 

On 3/29/2016 12:22 PM, notbob wrote:
On 2016-03-29, Leon lcb11211@swbelldotnet wrote:


if the bottom funnels toward the center the fastener head can
deflect the washer and then only the edge/perimeter of the fastener head
is making contact. Why is this a problem?

No one but yerself is positing that it even IS a problem.

What is that again?




You say, "if". What "if" it is NOT a problem? I suspect good
forstner bits are jes as flat as those pricey pointless bits, with
only the "point" extending beyond the flat cutter arms. In fact,
if one has a drill press and good HSS bits, what's to prevent one from
grinding down the "point".

I am talking about a Forstner bit vs. a regular twist bit, or brad point
bit which do not leave flat bottoms.



According to Wiki, the main advantage to forstner bits was not the
flat bottom:

Well leave it to Wiki to be the end all answer site. ;~)



"Originally the Forstner bit was very successful with gunsmiths
because of its ability to drill an exceedingly smooth-sided hole."

Shickingly I can't say that I have ever had issue with a non smooth side
unless using a spade type bit. Standard twist and brad point bits leave
very smooth sides. Forstner bits mostly do exceptionally well at
drilling into a surface at an angle and or cutting non full circle arc's
indention or half circles.


https://en.wikipedia.org/wiki/Drill_bit#Forstner_bits

Yes, I saw the comment about the flat bottom:

"(and incidentally spoils the otherwise flat bottom of the hole)".

Again, I say, who cares? Some anal purist, no doubt, but what with
all those power tools in the mix, it's pretty silly. Besides, don't
washers have a hole in the middle?

Hummmmmmmmm. One poster asked and the question was answered. Now you
are becoming all anal about your point of view.




I'm rapidly beginning to suspect woodworking is merely yet another
reason for men to buy/hoard a whole buncha specialized tools. I've
got a 1/4" socket paring chisel coming tomorrow, which is amazing only
due to the fact that I have no clue how I'm gonna use it w/o that
necessary wooden mallet.

Yeah, I know. I'm already hooked. ;)

nb



Like trolling, do you?

flat bottom forstner bits
 

On 3/29/2016 12:57 PM, notbob wrote:
On 2016-03-29, Puckdropper puckdropper wrote:

The little divots left by the Forstner bit would be very unappealing
in that case.

So, grind the point off!

I know the next power tool I buy will probably be some sorta drill
press. My last DP was too heavy to move from CA to CO. :(

Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact! And, with a drill press,
pilot holes are no longer so important.

nb



You might want to talk to a plumber or door installer about hole saws
and hand drills.

flat bottom forstner bits
 

On 3/29/2016 1:35 PM, Ed Pawlowski wrote:
On 3/29/2016 1:57 PM, notbob wrote:


Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact! And, with a drill press,
pilot holes are no longer so important.

nb


Depends on how accurate you want to be. The pin point on the bit makes
it easier to line up with the pencil dot on the board for dead center.
But it does not make a difference in making the hold.


Precicely!

flat bottom forstner bits
 

On Tuesday, March 29, 2016 at 2:48:43 PM UTC-4, notbob wrote:
On 2016-03-29, Puckdropper puckdropper wrote:

I put my Forstners in the handheld drill without a second thought.

The larger the diameter, the greater the problem. Yer arm, yer
choice.

Apparently, I'm still thinking old school metalworking.
I have a 1/2" drive Milwaukee drill motor. Max 400 rpm, so
it's high torque and no clutch. I was cutting concrete with a
homemade 1-1/2" bore cutter bit. The cutter hit an I-beam and the
drill motor tore itself outta my hands (trigger lock on) and didn't
stop until the drill motor had wrapped itself in its own power cord
and ripped the cord completely off the unit.

I have taken to drilling with the drill/driver clutch set to one notch
below the maximum position.

Using a hole saw to make a doorknob hole ina door. I see yer point
about using the hole saw in wood. Never happen in metal.

Are you saying you would never use a hole saw with a hand held drill
in metal?

Man, you must really subscribe to the old school methods.

Here, take a lesson.

https://www.youtube.com/watch?v=aj12WdVhOCc

flat bottom forstner bits
 

On 2016-03-29, Leon lcb11211@swbelldotnet wrote:

Like trolling, do you?

No. Do you? ;)

nb

flat bottom forstner bits
 

On 2016-03-29, Leon lcb11211@swbelldotnet wrote:

You might want to talk to a plumber or door installer about hole saws
and hand drills.

Yes. Perhaps I was a bit too fast outta that gate. ;)

nb

flat bottom forstner bits
 

On Tue, 29 Mar 2016 11:57:27 -0500, Leon wrote:

If you
don't have the work secured, the bit can pull the work (and your hand)
into it - DAMHIKT!

Yes! and why I mentioned doing this on a DP. ;~)

It was a drill press where I found out about the problem - the hard way!
I had the work up against a fence and a stop - the stop should have been
on the other end!



--
Nobody expects the Spanish Inquisition!

flat bottom forstner bits
 

On 3/29/2016 4:30 PM, notbob wrote:
On 2016-03-29, Leon lcb11211@swbelldotnet wrote:

You might want to talk to a plumber or door installer about hole saws
and hand drills.

Yes. Perhaps I was a bit too fast outta that gate. ;)

nb



;~) Perhaps. Been there, done that, before myself.

flat bottom forstner bits
 

On 3/29/2016 12:57 PM, notbob wrote:

Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact!

"FACT": know what you're talking before showing your ignorance.

--
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Wood Shop: www.e-WoodShop.net
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http://www.custommade.com/by/ewoodshop/
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KarlCaillouet@ (the obvious)

flat bottom forstner bits
 

On 3/29/2016 12:22 PM, notbob wrote:

According to Wiki, the main advantage to forstner bits was not the
flat bottom:

FACT: Speak from personal experience, and not what you parrot from
googlefu ...

Bon jour ...

--
eWoodShop: www.eWoodShop.com
Wood Shop: www.e-WoodShop.net
https://www.google.com/+eWoodShop
https://plus.google.com/+KarlCaillouet/posts
http://www.custommade.com/by/ewoodshop/
https://www.facebook.com/eWoodShop-206166666122228
KarlCaillouet@ (the obvious)

flat bottom forstner bits
 

On 2016-03-30, Swingman wrote:
On 3/29/2016 12:57 PM, notbob wrote:
Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact!

"FACT": know what you're talking before showing your ignorance.

I apologize fer applying my knowledge of metalworking to your world of
woodworking. I spoke too soon and spoke from having very little
real-world knowledge of woodworking. Obviously, they are not the same
and I was wrong. But, I am trying to learn. Patience, please.

As fer "showing ... ignorance", hey, I can stand proud with the best
of 'em. ;)

nb

flat bottom forstner bits
 

On Wednesday, March 30, 2016 at 12:40:58 PM UTC-4, notbob wrote:
On 2016-03-30, Swingman wrote:
On 3/29/2016 12:57 PM, notbob wrote:
Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact!

"FACT": know what you're talking before showing your ignorance.

I apologize fer applying my knowledge of metalworking to your world of
woodworking. I spoke too soon and spoke from having very little
real-world knowledge of woodworking. Obviously, they are not the same
and I was wrong. But, I am trying to learn. Patience, please.

As fer "showing ... ignorance", hey, I can stand proud with the best
of 'em. ;)

nb

The problem is that your statement does not apply to metal working either.

You said:

"Using a hole saw to make a doorknob hole ina door. I see yer point
about using the hole saw in wood. Never happen in metal. "

I have used hole saws in a hand held drill to bore holes in metal countless
times. I even posted a video of a guy using a cordless drill to bore a hole
in a fairly thick piece of steel.

The only "fact" we can state is that not everything can be brought to
a drill press. Some work must be done on site regardless of whether
it's wood, metal, glass, plastic, whatever.

flat bottom forstner bits
 

On 2016-03-30, DerbyDad03 wrote:

The problem is that your statement does not apply to metal working either.

Sorry, but I gotta disagree on that one.

Not only can the drill press be brought to the work, I've done it
dozens of times. It's called a magnetic drill press and all one needs
is to provide a sheet of megnetic metal near the drill point. No
doubt you have a great collection of clamps.

https://www.milwaukeetool.com/power-...corded/4270-20

Any volunteers to cut a doorknob hole using this anda hand drill
motor?:

http://tinyurl.com/zqsws54

I've used one ona Bridgeport and it still wasn't pretty, but I got it
to work at molasses-in-Jan feeds/speeds.

I'd love to see anyone here try and cut a 1-1/2" dia hole in 2 inches of
T6 alum or acrylic plastic with a hand drill motor and a hole saw.
Bring yer own EMT. ;)

nb

flat bottom forstner bits
 

On 3/30/2016 3:09 PM, DerbyDad03 wrote:
On Wednesday, March 30, 2016 at 12:40:58 PM UTC-4, notbob wrote:
On 2016-03-30, Swingman wrote:
On 3/29/2016 12:57 PM, notbob wrote:
Things like forstner bits and hole saws should NOT be used with a hand
held drill motor. That I know, for a fact!

"FACT": know what you're talking before showing your ignorance.

I apologize fer applying my knowledge of metalworking to your world of
woodworking. I spoke too soon and spoke from having very little
real-world knowledge of woodworking. Obviously, they are not the same
and I was wrong. But, I am trying to learn. Patience, please.

As fer "showing ... ignorance", hey, I can stand proud with the best
of 'em. ;)

nb

The problem is that your statement does not apply to metal working either.

You said:

"Using a hole saw to make a doorknob hole ina door. I see yer point
about using the hole saw in wood. Never happen in metal. "

I have used hole saws in a hand held drill to bore holes in metal countless
times. I even posted a video of a guy using a cordless drill to bore a hole
in a fairly thick piece of steel.


Actually so has the automotive industry. Hole saws were used with a
hand held drill to add AC systems to vehicles as a retrofit many years
ago. Refrigerant lines had to be run from under the hood through the
firewall into the evaporator unit.