[Lab] ideas for small spindle for small cnc

Wed Feb 9 22:06:40 EST 2011

That freedom link looks like a great 1/8th chuck. 16.00 bucks. I went to
grab one but they wanted 20.00 for shipping and handling for an item that
fits in an envelope. I'll check back again later to see if there is a
minimum order or something that's happening there.

On Wed, Feb 9, 2011 at 9:54 PM, Andrew Plumb <andrew at plumb.org> wrote:

> Busy Bee Tools may have something:
> http://www.busybeetools.com/categories/Hand-Tools/Chucks/Drill-Chucks/
>
> Foredom carries some micro chucks that might work:
> http://www.foredom.net/colletadpatersmicrochucks.aspx
>
> Lee Valley Tools has started carrying some of the Foredom line, so they may
> be able to order one in for you.
>
>
> Andrew.
> <http://www.busybeetools.com/categories/Hand-Tools/Chucks/Drill-Chucks/>
> On 2011-02-09, at 8:50 PM, Darcy Whyte wrote:
>
> I suspect that standard drill chuck is much too large to mount small
> endmills like 1/64 or 1/32 and turn them at 20,000 rpm. There has to be
> something more the size of a dremel chuck out there. Ideally I think direct
> drive is the way to go and a belt if I can only find a chuck with a shaft.
>
>
>
> On Wed, Feb 9, 2011 at 8:48 PM, Paul (Maker Engineering) <
> paul at makerengineering.com> wrote:
>
>> Oh and not sure about that one in particular but most drill press chucks
>> are friction fit. (very slightly tapered hole and you pound it on)
>>  On 2011-02-09 8:31 PM, "Richard Guy Briggs" <rgb at tricolour.net> wrote:
>> > On Wed, Feb 09, 2011 at 07:38:42PM -0500, Paul (Maker Engineering)
>> wrote:
>> >> Something like this:
>> >>
>> http://www.canadiantire.ca/AST/browse/6/Tools/PowerToolAccessories/Chucks/PRD~0545561P/Mastercraft%252B3%25252B8-in.%252BChuck%252BWith%252BKey.jsp?locale=en
>> >>
>> >> <
>> http://www.canadiantire.ca/AST/browse/6/Tools/PowerToolAccessories/Chucks/PRD~0545561P/Mastercraft%252B3%25252B8-in.%252BChuck%252BWith%252BKey.jsp?locale=en
>> >probably
>> >> designed to fit on a standard shaft (like 8mm, or 6mm rod cut to
>> length,
>> >> maybe turned down a bit).
>> >
>> > How does it attach to the shaft?
>> >
>> >> Mount a pulley on that, to drive it by belt
>> >>
>> >> Then drive it with one of these:
>> >>
>> http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8480
>> >>
>> >> <
>> http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8480
>> >Capable
>> >> of 40,000 RPM at 12V, and at max power (which you would have a hard
>> time
>> >> sourcing the amps for), it can put out half a horsepower (in it's
>> optimal
>> >> power band).
>> >
>> > Holy crap! that's barely larger than a cubic inch!
>> >
>> >> Power the motor with something like one of these guys:
>> >>
>> http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9299
>> >>
>> >> <
>> http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9299
>> >with
>> >> a small fan on it (or hell mount a fan on the shaft of the motor before
>> the
>> >> pulley and use the backwash to cool the motor and the ESC). Feed it
>> direct
>> >> 12V from your PSU, and feed it a pwm servo signal to accurately control
>> >> speed of the spindle.
>> >
>> > A PC AT or ATX power supply modded should be easily able to supply that.
>> >
>> >> Simple, effective, and affordable. :)
>> >>
>> >> - Paul
>> >>
>> >> On Wed, Feb 9, 2011 at 6:51 PM, Darcy Whyte <darcy at siteware.com>
>> wrote:
>> >>
>> >> >
>> >> > Great idea.
>> >> >
>> >> > I could run the spindle chuck from a belt or I could try and find a
>> chuck
>> >> > that could mount on the shaft. Nothing shows up in ebay but I don't
>> know
>> >> > what to search for. I'll keep fishing around...
>> >> >
>> >> > Darcy
>> >> >
>> >> >
>> >> > On Wed, Feb 9, 2011 at 6:21 PM, Paul (Maker Engineering) <
>> >> > paul at makerengineering.com> wrote:
>> >> >
>> >> >> I would say get a shaft that fits a stock chuck (drill press chuck
>> for
>> >> >> example)
>> >> >>
>> >> >> Mount a pulley drive on it, and drive it from an RC Brushless DC
>> Motor,
>> >> >> with an RC Speed controller. You can send it simple servo signals
>> (pwm) to
>> >> >> control the speed accurately and easily, and the whole thing would
>> be quite
>> >> >> high torque, and fairly cheap. And no fancy electronics to power the
>> motor,
>> >> >> just feed it raw 12VDC from your main PSU.
>> >> >>
>> >> >> - Paul
>> >> >>
>> >> >> On Wed, Feb 9, 2011 at 6:15 PM, Darcy Whyte <darcy at siteware.com>
>> wrote:
>> >> >>
>> >> >>> Hi,
>> >> >>>
>> >> >>> I want to make a couple small CNC mills for fun. I decided the
>> Mantis is
>> >> >>> too small so I am doing other designs. I want to use it for cutting
>> balsa
>> >> >>> wood and the other for more general purpose.
>> >> >>>
>> >> >>> I am looking for ideas for the spindle for cutting balsa wood. I
>> think if
>> >> >>> it had an 1/8th chuck so I could use my 1/64th end mill that would
>> be cool.
>> >> >>>
>> >> >>> Any ideas what to use for the spindle??
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>>
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>> >> >>>
>> >> >>
>> >> >
>> >
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>> >
>> > slainte mhath, RGB
>> >
>> > --
>> > Richard Guy Briggs -- ~\ -- ~\ <hpv.tricolour.net>
>> > <www.TriColour.net> -- \___ o \@ @ Ride yer bike!
>> > Ottawa, ON, CANADA -- Lo_>__M__\\/\%__\\/\%
>> > Vote! -- <greenparty.ca
>> >_____GTVS6#790__(*)__(*)________(*)(*)_________________
>>
>
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