Re: I need help with a drill press chuck taper.
dca...@krl.org
> What I need is a 3/8" or larger capacity chuck for some end mills I have.
> Thanks for any help,
> Thor
It sounds as if you are wanting to do some light milling using your
drill press. That does not work well. With side loads on a drill
chuck, it will loosen and come off the spindle.
Assuming that you are going to try milling in your drill press, I
would advise you to buy a minature end mill with a shank diameter of
3/16. One will cost about $10 from MSC. This will be a cheaper way
to find out that milling with a drill press does not work very well.
You might find minature end mills on Ebay or Craigslist at a cheaper
price.
Dan
Robert Swinney
of Socket - 0.475";
Depth of Hole - 2 5/32".
Wild_Bill
generally Jacobs tapers (JT), not morse tapers (MT). Both of these tapers
are measured in inches.
http://www.tools-n-gizmos.com/specs/Tapers.html#JT
Male Jacobs tapers are short for fitting into the backs of drill chucks,
Morse are long for fiting into spindles.
It appears that your 6mm capacity chuck may have a JT1 taper, which would be
about right for a chuck with a capacity of approximately 1/4".
The eBay ad info isn't conclusive, since it isn't a MT1 chuck if no arbor is
supplied. The seller probably doesn't know the difference, so there is
probably not much point in asking.
The eBay chuck's spindle taper is more likely to be a JT33 (or threaded),
and will not be adaptable to your drill press spindle.
Large capacity chucks aren't generally made for small Jacobs tapers.
If you search for a 3/8" (~10mm) capacity chuck with a JT1 mount, I think
you'll discover that they aren't as common as 1/4" (~6mm) chucks.
As it has already been suggested, placing side loads (milling) on chucks
that are mounted with tapers will cause the chuck to release, which can
cause serious injury.
--
WB
.........
metalworking projects
www.kwagmire.com/metal_proj.html
"Thor" <Th...@nospam.net> wrote in message
news:n2aqm5576d5m4ec6q...@4ax.com...
>I have a micro drill press made by who knows who. It says model T-6M and
>MADE IN
> CHINA on the plastic top cover. Now this isn't one of the HF type drill
> presses,
> it is a micro press from ebay and is smaller than the HF table top
> presses. It
> is also green in color if that matters. I got it off of ebay several years
> ago
> and the seller is long gone.
>
> The chuck it came with has a little elephant on it(India?) and says
> 0.6-6mmD
> (little elephant) /99/ , that D isn't a typo. The chuck is a press fits to
> an
> arbor. The arbor taper on the drill press measures about 9mm on the bottom
> and
> about 10mm on the top, diameters, and the ground taper length looks to be
> 13ish
> mm long with clear , unground 10mm shank above that.
>
> I got a PDF from http://www.jacobschuck.com/pdf/Technical-Information.pdf
> and I think this is a morse taper #1. Can anyone help me confirm this?
>
> What I need is a 3/8" or larger capacity chuck for some end mills I have.
> Right
> now on ebay there is a made in India chuck...
> http://cgi.ebay.com/DRILL-CHUCK-1-2-13mm-CAPCITY-1-MORSE-TAPER-DRILL-PRESS_W0QQitemZ360126799128QQcmdZViewItemQQptZBI_Tool_Work_Holding?hash=item53d93add18
> or item #360126799128.
> They are saying this is a #1 taper 1.5 to 13mm capacity for $34. Is this a
> "good" price for made in India stuff? Will it even work on this press?
>
> Keep in mind hobby grade and light airgun stuff.
Ned Simmons
>
>To sum it all up, I need to drill a flat bottomed hole max .250" deep in the
>side of a round brass valve and what I have to work with is this micro drill
>press, end mills that have shanks that are too large and soon will have 63 #29
>bits. Oh, I get pretty much one shot at this.
Drill the hole as far as you dare with a normal drill, then grind a
drill like the one in these photos and square up the bottom.
http://www.suscom-maine.net/~nsimmons/news/FlatDrill1.JPG
http://www.suscom-maine.net/~nsimmons/news/FlatDrill2.JPG
http://www.suscom-maine.net/~nsimmons/news/FlatDrill3.JPG
You may want to break the front edges of the regular drill to prevent
it self-feeding in the brass. You're unlikely to have trouble with the
flat drill digging in.
http://yarchive.net/metal/brass_drilling.html
A prudent man would test the tools on a piece of scrap brass.
--
Ned Simmons
DoN. Nichols
> length is 0.482"
What you have is probably either a Jacobs taper (the hole in the
back of the drill chuck) or perhaps the European version which has
somewhat different dimensions. Look up Jacob's Taper in _Machinery's
Handbook_ to get the measurements.
The eBay auction is calling the taper on the chuck by the wrong
name. The Morse Taper is usually the other end of the arbor, which plugs
into a socket in the drill press spindle.
I suspect that a 3/8" chuck is too heavy to work well with the
spindle of your little high-speed drill press.
Good Luck,
DoN.
--
Email: <dnic...@d-and-d.com> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
Gunner Asch
>On Sat, 6 Feb 2010 06:24:48 -0800 (PST), "dca...@krl.org" <dca...@krl.org>
>wrote:
>Thanks for the reply.
>
>I am drilling into the side of a valve in an air gun(pellet) and I need a flat
>bottomed hole for an 8-32 screw. The total hole depth is .250". The point on a
>regular drill bit would go through the wall and not leave me with enough
>threads, two bad things. I have a mess of #29 bits on the way , I am not sure of
>the cutting angle on the bits.
>
>While this press is fairly accurate it does not take much side pressure at all,
>it tends to bend the frame.
>
>To sum it all up, I need to drill a flat bottomed hole max .250" deep in the
>side of a round brass valve and what I have to work with is this micro drill
>press, end mills that have shanks that are too large and soon will have 63 #29
>bits. Oh, I get pretty much one shot at this.
>
>
>Thor
Take it to a machine shop with a dozen donuts from the bakery and ask em
to do it for you. Likely they will put it on a mill and do it right.
Hell..I did something similar yesterday for a guy and didnt charge him a
cent.
Gunner
Whenever a Liberal utters the term "Common Sense approach"....grab your
wallet, your ass, and your guns because the sombitch is about to do
something damned nasty to all three of them.
DoN. Nichols
> On Sat, 6 Feb 2010 16:44:05 -0500, "Wild_Bill" <wb_wi...@XSPAMyahoo.com>
> wrote:
>
>>The taper fit between drill chucks and drill press spindle male tapers are
>>generally Jacobs tapers (JT), not morse tapers (MT). Both of these tapers
>>are measured in inches.
[ ... ]
> I am thinking this is a bastard taper, they just ground it till it works.
More likely a European taper (I forget the name, but it is a bit
different from the standard Jacobs taper in the US.
> The
> idea of finding a 3/8 chuck that fits on a 1/4 shaft is pretty much out of my
> mind now. I was hopeful by skeptical that a 1/2" chuck would fit. Well, the 1/2"
> chuck will fit, there will just be a LOT of play and it will fall off the arbor
> instantly<G>.
>
> My intent is to drill a flat bottomed hole in brass, more info in my reply to
Might I suggest that you drill it to almost the needed depth
with a standard drill (with the point "dubbed" (the rake eliminated) for
use in brass.) Then holding the end mill in a hand-held chuck, rotate
it just enough to flatten the bottom.
Of course -- have you considered that you may be drilling bronze
instead of brass? Bronzes are typically a lot tougher. And if it is
expected to work in contact with water, bronze is to be preferred.
Wild_Bill
some info that refers to them as Bxx series tapers (B10, 12, 16, 18, 20, 22,
24).
The actual standard may be DIN 238, but I'm not sure about that.
Rohm has a chart that includes the B-sizes, and a Jacobs Chuck technical PDF
refers to them as a DIN standard size, with the D10-D24 sizes shown.
http://www.gpsystem.com/rohm/product1/pic09.htm
The Jacobs literature states that the DIN series is actually identical to a
short length of some standard Morse tapers (cut down MT length).
http://www.jacobschuck.com/pdf/Techn...nformation.pdf
This link may not work, as it was just copied and pasted, but I was able to
get the pdf with a Save Target from the original link.
--
WB
.........
metalworking projects
www.kwagmire.com/metal_proj.html
"DoN. Nichols" <dnic...@d-and-d.com> wrote in message
news:slrnhmv5b0....@Katana.d-and-d.com...
>
> More likely a European taper (I forget the name, but it is a bit
> different from the standard Jacobs taper in the US.
>
Michael A. Terrell
Wild_Bill wrote:
>
> I was curious about a European standard for drill chuck tapers, and found
> some info that refers to them as Bxx series tapers (B10, 12, 16, 18, 20, 22,
> 24).
> The actual standard may be DIN 238, but I'm not sure about that.
>
> Rohm has a chart that includes the B-sizes, and a Jacobs Chuck technical PDF
> refers to them as a DIN standard size, with the D10-D24 sizes shown.
> http://www.gpsystem.com/rohm/product1/pic09.htm
>
> The Jacobs literature states that the DIN series is actually identical to a
> short length of some standard Morse tapers (cut down MT length).
>
> http://www.jacobschuck.com/pdf/Techn...nformation.pdf
> This link may not work, as it was just copied and pasted, but I was able to
> get the pdf with a Save Target from the original link.
http://www.jacobschuck.com/pdf/Technical-Information.pdf is the valid
link.
--
Greed is the root of all eBay.
sta...@prolynx.com
> I was curious about a European standard for drill chuck tapers, and found
> some info that refers to them as Bxx series tapers (B10, 12, 16, 18, 20, 22,
> 24).
> The actual standard may be DIN 238, but I'm not sure about that.
>
> Rohm has a chart that includes the B-sizes, and a Jacobs Chuck technical PDF
>
> The Jacobs literature states that the DIN series is actually identical to a
> short length of some standard Morse tapers (cut down MT length).
>
> http://www.jacobschuck.com/pdf/Techn...nformation.pdf
> This link may not work, as it was just copied and pasted, but I was able to
> get the pdf with a Save Target from the original link.
>
> --
> WB
> .........
Someone a few years back was looking for a replacement chuck on his
Chinese iron and that's what it was imported with for a drill chuck
taper. Finding a chuck to match may be a problem, though, they're not
exactly hot items in the US market.
Stan
DoN. Nichols
> I was curious about a European standard for drill chuck tapers, and found
> some info that refers to them as Bxx series tapers (B10, 12, 16, 18, 20, 22,
> 24).
> The actual standard may be DIN 238, but I'm not sure about that.
[ ... ]
> http://www.jacobschuck.com/pdf/Techn...nformation.pdf
> This link may not work, as it was just copied and pasted, but I was able to
> get the pdf with a Save Target from the original link.
The main problem with the above is that your news server, in the
interests of protecting privacy, have snipped the middle out of the
last part of the URL. I was able to guess (on the second try) what it
should be:
<http://www.jacobschuck.com/pdf/Technical-information.pdf>
or if that gets compressed, replace the last part of the original quoted
above with "Technical-information.pdf".
Interesting -- the tapers of the DIN B series chuck mounting
tapers match that of a very truncated section of a Morse taper instead
of using the Jacobs tapers.
Enjoy,
Wild_Bill
European UK? MSC/J&L website searches list chucks with Bxx mounts by Bison,
Rohm and a *value* source (China/India, possibly).
The Enco and MSC USA sites don't seem to recognize B10 (etc) as a drill
chuck feature/parameter.
Actually, the Jacobs link was already abbreviated where I found it (in a web
forum discussion), and I figgered most of the readers here would be able to
decipher the link or find the document, if the link didn't work.
This hack/spit MS Vistablows machine has so many security protections, I
can't even view a PDF in the browser from a link.
I'm unable to even save PDFs from links that are posted in RCM. For links to
PDFs in the Dropbox (for example), I have to navigate to the Dropbox, then
find the PDF, then use the Save Target function.
I was actually surprised when I could retrieve (Save Target) the Jacobs PDF
from an abbreviated link.
I don't care about trying to fix these things, it's just bothersome.
--
WB
.........
metalworking projects
www.kwagmire.com/metal_proj.html
"DoN. Nichols" <dnic...@d-and-d.com> wrote in message
news:slrnhn1e4g....@Katana.d-and-d.com...