Anyone know how to slow down a drill press without adding a jack shaft?

Alex

AAvK said:


Anyone know how to slow down a drill press without adding a jack shaft?

What kind of drill press? Does it already have a pulley arrangement
to change speeds? A smaller motor pulley, and/or a bigger quill
pulley. And there is also replacing the motor with a slower model.
You generally only have two choices, 1725 and 3450 RPM.

What WON'T work - a light dimmer.

FWIW,

Greg G.

What kind of drill press? Does it already have a pulley arrangement
to change speeds? A smaller motor pulley, and/or a bigger quill
pulley. And there is also replacing the motor with a slower model.
You generally only have two choices, 1725 and 3450 RPM.
What WON'T work - a light dimmer.


Yeah the dining room light dimmer, let's rip it out and put it on the motor! WEEEEEE!!!
Sounds like it could be advice from Mad magazine.

It is a cheapy Chinese mini DP, $40 at the Homier traveling tool show. Something like
4 1/2" center-to-column and with a 4 speed set of pulleys on top. Very standard and low-
end, can't lock the quill in place. The motor is 1700 rpm (not 1725). Works well but the
lowest speed has this tacky chafing sound first time I ran it, so, must be some runout.

I imagine one could place a larger single gulley wheel on the front spindle, or something
like that...? I know a variable speed DC motor and control board would be really expensive,
after all the searching I've done.

Alex

"AAvK" wrote in message
news:r9t8d.12370$mS1.5494@fed1read05...

What kind of drill press? Does it already have a pulley arrangement
to change speeds? A smaller motor pulley, and/or a bigger quill
pulley. And there is also replacing the motor with a slower model.
You generally only have two choices, 1725 and 3450 RPM.
What WON'T work - a light dimmer.


Yeah the dining room light dimmer, let's rip it out and put it on the
motor! WEEEEEE!!!
Sounds like it could be advice from Mad magazine.

It is a cheapy Chinese mini DP, $40 at the Homier traveling tool show.
Something like
4 1/2" center-to-column and with a 4 speed set of pulleys on top. Very
standard and low-
end, can't lock the quill in place. The motor is 1700 rpm (not 1725).
Works well but the
lowest speed has this tacky chafing sound first time I ran it, so, must be
some runout.

I imagine one could place a larger single gulley wheel on the front
spindle, or something
like that...? I know a variable speed DC motor and control board would be
really expensive,
after all the searching I've done.

Almost anything you try to do to this animal is going to cost almost as much
as you paid for the whole thing to begin with. IMHO, you'd be better off to
"cut your losses" and maybe look he

http://www.grizzly.com/products/item...000&sort=price

--
Nahmie
The law of intelligent tinkering: save all the parts.

"AAvK" wrote in message

It is a cheapy Chinese mini DP, $40 at the Homier traveling tool show.
Something like
4 1/2" center-to-column and with a 4 speed set of pulleys on top. Very
standard and low-
end, can't lock the quill in place. The motor is 1700 rpm (not 1725).
Works well but the
lowest speed has this tacky chafing sound first time I ran it, so, must be
some runout.

I imagine one could place a larger single gulley wheel on the front
spindle, or something
like that...? I know a variable speed DC motor and control board would be
really expensive,
after all the searching I've done.

Pretty soon you'll be up to the cost of a good drill press. Donate it to
some charity run thrift shop and get a decent 12" model. This one sounds
like just more heartache in the future.

AAvK wrote:


What kind of drill press? Does it already have a pulley arrangement
to change speeds? A smaller motor pulley, and/or a bigger quill
pulley. And there is also replacing the motor with a slower model.
You generally only have two choices, 1725 and 3450 RPM.
What WON'T work - a light dimmer.


Yeah the dining room light dimmer, let's rip it out and put it on the
motor! WEEEEEE!!! Sounds like it could be advice from Mad magazine.

It is a cheapy Chinese mini DP, $40 at the Homier traveling tool show.
Something like 4 1/2" center-to-column and with a 4 speed set of pulleys
on top. Very standard and low- end, can't lock the quill in place. The
motor is 1700 rpm (not 1725). Works well but the lowest speed has this
tacky chafing sound first time I ran it, so, must be some runout.

I imagine one could place a larger single gulley wheel on the front
spindle, or something like that...? I know a variable speed DC motor and
control board would be really expensive, after all the searching I've
done.

Larger pulley on the front, smaller on the motor. If you want to have fun
you could play with a couple of variable-pitch pulleys, but then you would
have to set up some means of monitoring the RPM.

Best bet if you're in the US would be to get thee to Lowes before all the
closeout Deltas are gone.

Alex

--
--John
Reply to jclarke at ae tee tee global dot net
(was jclarke at eye bee em dot net)

Speed comes from the number of windings and the clock at the electric
company, regardless of the nameplate.

Dumb question, but are the pulley cones installed properly? Other than
that, check to see if you can get a cone with larger diameters for the
front.

"AAvK" wrote in message
news:r9t8d.12370$mS1.5494@fed1read05...

It is a cheapy Chinese mini DP, $40 at the Homier traveling tool show.
Something like
4 1/2" center-to-column and with a 4 speed set of pulleys on top. Very
standard and low-
end, can't lock the quill in place. The motor is 1700 rpm (not 1725).
Works well but the
lowest speed has this tacky chafing sound first time I ran it, so, must be
some runout.

On Tue, 5 Oct 2004 08:02:27 -0400, "George" george@least wrote:

Speed comes from the number of windings and the clock at the electric
company, regardless of the nameplate.

Broadly so, but the difference between 1700 and 1725 is down to motor
design. A motor that runs at significantly less than this theoretical
limit is likely to be less efficient, run hotter, fail sooner, and be
cheaper to buy.

(The term your search should be looking for is "slip")


--
Die Gotterspammerung - Junkmail of the Gods

Nifty, but not germane. Inductive slip, belt slip, loading - as stated, a
guess for the nameplate, not the RPM, since none are constant.


"Andy Dingley" wrote in message
...
On Tue, 5 Oct 2004 08:02:27 -0400, "George" george@least wrote:

Speed comes from the number of windings and the clock at the electric
company, regardless of the nameplate.

Broadly so, but the difference between 1700 and 1725 is down to motor
design. A motor that runs at significantly less than this theoretical
limit is likely to be less efficient, run hotter, fail sooner, and be
cheaper to buy.

(The term your search should be looking for is "slip")


--
Die Gotterspammerung - Junkmail of the Gods

On Mon, 4 Oct 2004 23:54:03 -0700, "AAvK" wrote:


Anyone know how to slow down a drill press without adding a jack shaft?

Alex



take away it's car keys?

Pretty soon you'll be up to the cost of a good drill press. Donate it to
some charity run thrift shop and get a decent 12" model. This one sounds
like just more heartache in the future.


"I know", but I am poorer than that, sorry to say, health conditions. The one I want
is a larger benchtop type, 12 speeds and 14" swing if that is 7" center to column.
As Norman suggested, the Grizz G7943 is the idea, and other generic Asian ones
are the same. The Grizz gets down to 140rpm, pretty cool!

Alex

Larger pulley on the front, smaller on the motor. If you want to have fun
you could play with a couple of variable-pitch pulleys, but then you would
have to set up some means of monitoring the RPM.
Best bet if you're in the US would be to get thee to Lowes before all the
closeout Deltas are gone.


yeah but ain't no Loew's near me. there is an HF about 40 miles south. Still
can't afford it.
Alex

On Tue, 5 Oct 2004 06:50:28 -0400, "Norman D. Crow"
calmly ranted:

Almost anything you try to do to this animal is going to cost almost as much
as you paid for the whole thing to begin with. IMHO, you'd be better off to
"cut your losses" and maybe look he

http://www.grizzly.com/products/item...000&sort=price

Yeah, the G9746 and G9747 look pretty nice.


--
Strong like ox, smart like tractor.
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