Spindle recomendations

[aarggh]

oh easy.
regarding the pump, its any small water pump (fish thank?)

Generally one of the submerged small pond pumps works a treat, they're about the $20-$25 range.

And I'd recommend not using water, just undiluted coolant so you don't have to worry about scale build-up or other nasties over time.

cheers, Ian

[ger21]

Some of those spindles are for "woodworking" and some for "Metal" What makes that difference?

If you read the description of the "metalworking" ones, it says they have more midrange torque and less high end torque. They also need a VFD capable of 800Hz, rather than the typical 400Hz.

[KH0UJ]

On my opinion I adapt to what`s available, if the available spindle is let`s say 12K RPM (mid RPM torque), I just double the flute of my bit and adjust my CAM programming higher passes with lower feed /plunge rate of course, if it`s on 24K (high RPM torque) I use a single flute and a finer pass, but I think the most practical and economical option is the 24K spindle because I only need a single flute bit, easy to make (blank carbide bits are cheap) and easy to resharpen if it gets dull, unlike the lower RPM spindle you need to by a multi flute bit which is a bit pricey, not to mention if it gets dull sometimes you need a special grinder to re sharpen it, so yes im on the 24K spindle if it`s a lower watt 24K spindle then I adjust again the cam programming to a finer pass for it not to be over stressed. I always run the spindles on it`s safest mode.

[KH0UJ]

Are you guys pump inline? Can someone please post a pic of their setup. I'm looking for the most simplistic.

Note the drive PC is not the actual unit, It`s somewhat wish list I just put it there because I got lazy drawing the actual drive unit

[FoxCNC1]

I know I have abandoned this for a while, but after some difficulties with some finishes on parts, I think its time to make the investment.
I did a little more researching and was told the air cooled spindles at least those of GMT brand have stronger bearings that their water cooler counter parts. Could this be true ?

I really don't want dust blowing all over the place (water) , but at the same time if I am going to upgrade I want to go with something that will let me cut alum. with ease (albeit at shallow passes)

[ger21]

If the collets are the same size, than the bearings are likely the same size (and strength). If you want "stronger bearings", get a spindle with an ER25 collet.

[FoxCNC1]

If the collets are the same size, than the bearings are likely the same size (and strength). If you want "stronger bearings", get a spindle with an ER25 collet.

Well you mention "stronger" bearings - in reality this is making the assumption that the larger bearings are stronger.
Overall I think the consensus is (and correct me if I am wrong) that a spindle will be stronger and have less run out than a Bosch router and hence produce better cuts and better finishes? What are you thoughts Ger?