Huot index with 8 USA HSS Silver and Deming drill bits, 1/2" shank,
9/16 to 1". All new except 3/4", which is almost new. $12.05

Union Butterfield drill bit set, 1/64 to 1/2 by 1/64", TiN plated, in
huot index, all brand new, $10.

USA made drill bit set, small sizes about up to 1/4" by 0.001 or 0.002
(I do not understand the principle), looks like all others, $5.

i

On 2010-09-27, Ignoramus24898 wrote:
Huot index with 8 USA HSS Silver and Deming drill bits, 1/2" shank,
9/16 to 1". All new except 3/4", which is almost new. $12.05

Nice!

USA made drill bit set, small sizes about up to 1/4" by 0.001 or 0.002
(I do not understand the principle), looks like all others, $5.

Are you sure that is not a number size (wire size) drill set?
60 drills ranging from something like 0.040" for the #60 up to 0.228"
for the #1.

Don't expect them to be even sized steps. The sizes essentially
fill gaps left in the fractional inch sizes, so some skip over the
fractional in size. Also -- the size of the steps varies with the
overall size of the bit. For example, the #59 is 0.0410" and the #60 is
0.0400" -- so only 0.001" step size. But at the other end, the #1 is
0.2280" and the #2 is 0.2210" -- a step size of 0.007".

I believe that the sizes are related to the formation of wire by
drawing it through successively smaller holes -- with adjustments to
skip the fractional near misses. So you wind up with 0.1285" for a #30
and 0.1200" for a #31 -- skipping the 0.1250" for a 1/8".

Anyway -- don't expect the number sizes to fit a neat formula
for calculation. It is easier to implement a look-up table in your
program.

Here are the sizes:

http://sector7.xor.aps.anl.gov/tables/number_drill.html

The number series actually goes on down to #80 (0.0135") in a
separate smaller index. If you have one of the 115 bit Huot indexes
(fractional, number, and letter sizes) you may have noticed a bent up
hook in the letter size section. It turns out that this is just right
to hold the index for the #61-#80 bits. (I discovered this almost by
accident -- never read about it anywhere, but wondered what it was for,
and since I had a Huot #61-#80 index, I tried it for fit and was quite
pleased.

Enjoy,
DoN.

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On 2010-09-27, DoN. Nichols wrote:
On 2010-09-27, Ignoramus24898 wrote:
Huot index with 8 USA HSS Silver and Deming drill bits, 1/2" shank,
9/16 to 1". All new except 3/4", which is almost new. $12.05

Nice!

USA made drill bit set, small sizes about up to 1/4" by 0.001 or 0.002
(I do not understand the principle), looks like all others, $5.

Are you sure that is not a number size (wire size) drill set?
60 drills ranging from something like 0.040" for the #60 up to 0.228"
for the #1.

Yes, it is very possibly that.

i

Don't expect them to be even sized steps. The sizes essentially
fill gaps left in the fractional inch sizes, so some skip over the
fractional in size. Also -- the size of the steps varies with the
overall size of the bit. For example, the #59 is 0.0410" and the #60 is
0.0400" -- so only 0.001" step size. But at the other end, the #1 is
0.2280" and the #2 is 0.2210" -- a step size of 0.007".

I believe that the sizes are related to the formation of wire by
drawing it through successively smaller holes -- with adjustments to
skip the fractional near misses. So you wind up with 0.1285" for a #30
and 0.1200" for a #31 -- skipping the 0.1250" for a 1/8".

Anyway -- don't expect the number sizes to fit a neat formula
for calculation. It is easier to implement a look-up table in your
program.

Here are the sizes:

http://sector7.xor.aps.anl.gov/tables/number_drill.html

The number series actually goes on down to #80 (0.0135") in a
separate smaller index. If you have one of the 115 bit Huot indexes
(fractional, number, and letter sizes) you may have noticed a bent up
hook in the letter size section. It turns out that this is just right
to hold the index for the #61-#80 bits. (I discovered this almost by
accident -- never read about it anywhere, but wondered what it was for,
and since I had a Huot #61-#80 index, I tried it for fit and was quite
pleased.

Enjoy,
DoN.

On 2010-09-27, Ignoramus24898 wrote:
On 2010-09-27, DoN. Nichols wrote:
On 2010-09-27, Ignoramus24898 wrote:
Huot index with 8 USA HSS Silver and Deming drill bits, 1/2" shank,
9/16 to 1". All new except 3/4", which is almost new. $12.05

Nice!

USA made drill bit set, small sizes about up to 1/4" by 0.001 or 0.002
(I do not understand the principle), looks like all others, $5.

Are you sure that is not a number size (wire size) drill set?
60 drills ranging from something like 0.040" for the #60 up to 0.228"
for the #1.

Yes, it is very possibly that.

In which case -- *keep* it. Usually called "number size" or
"wire size" drills.

Those sizes are the best choices as the tap drills for many
smaller taps. I like having the fractional, number, letter, *and*
metric drill sets -- so between them you can usually find something just
the size you need -- including fine tuning the tap drill size when you
are tapping long threads in tough material. As long as there is enough
length to supply the strength when you have less percentage of thread
depth.

Enjoy,
DoN.

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On 9/26/2010 8:16 PM, DoN. Nichols wrote:

If you have one of the 115 bit Huot indexes
(fractional, number, and letter sizes) you may have noticed a bent up
hook in the letter size section. It turns out that this is just right
to hold the index for the #61-#80 bits. (I discovered this almost by
accident -- never read about it anywhere, but wondered what it was for,
and since I had a Huot #61-#80 index, I tried it for fit and was quite
pleased.

I've been damned annoyed by that hook for decades, in that it allows a
few drill bits to slide forward, preventing lifting the index on that
side until they've been slid back. Now I know!

Learn something new every day....


Jon

On 2010-09-27, Jon Anderson wrote:
On 9/26/2010 8:16 PM, DoN. Nichols wrote:

If you have one of the 115 bit Huot indexes
(fractional, number, and letter sizes) you may have noticed a bent up
hook in the letter size section. It turns out that this is just right
to hold the index for the #61-#80 bits. (I discovered this almost by
accident -- never read about it anywhere, but wondered what it was for,
and since I had a Huot #61-#80 index, I tried it for fit and was quite
pleased.

I've been damned annoyed by that hook for decades, in that it allows a
few drill bits to slide forward, preventing lifting the index on that
side until they've been slid back. Now I know!

And -- if you have the #61-80 index in there it reduces the
amount of hooking that occurs there -- not totally, but a significant
improvement.

Enjoy,
DoN.

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On 27 Sep 2010 22:12:24 GMT, "DoN. Nichols"
wrote:

And -- if you have the #61-80 index in there it reduces the
amount of hooking that occurs there -- not totally, but a significant
improvement.

Enjoy,
DoN.


"hooking"? Wuzzat?????? Maybe like when the bits slide out of situ
while the case is closed, and they get caught or "hooked"?

On 2010-09-28, Brian Lawson wrote:
On 27 Sep 2010 22:12:24 GMT, "DoN. Nichols"
wrote:

And -- if you have the #61-80 index in there it reduces the
amount of hooking that occurs there -- not totally, but a significant
improvement.

[ ... ]

"hooking"? Wuzzat?????? Maybe like when the bits slide out of situ
while the case is closed, and they get caught or "hooked"?

Yep! You grab the edge of the topmost letter tray in the
115-bit set and start to lift it, and it comes up about a quarter inch
or less and then pulls out of your grip -- until you tilt the index so
the letter drill side is down and the bits are no longer protruding
under the clip (he called it a hook) designed to hold the #61-#80 index
(sort of like a thick matchbook in size).

FWIW -- while the old HUOT drill indexes were gray hammertone,
and the newer ones are something like a fine-grained gray wrinkle
finish, the #61-#80 index from HUOT is blued steel -- or at least mine
is.

Oh yes -- I also have an index for 3/4" to 1" Morse Taper 3
drills (a nice fit for my lathe's tailstock) which is olive drab -- and
the bits weigh enough so the pins on which the trays pivot tend to pop
out from time to time. :-)

Enjoy,
DoN.

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