Speaking of spindles

[chuck99z28]

What are the options?

Seems most people use Dremel's or other rotary tools.
Of couse there is the Wolfgang Spindle.

But, has anyone seen anything else worth looking at?

[Jay C]

Using a Bosh Colt with Precise Bits precision collet system. Posted a video in another thread. That's a 1206 SMD resistor I'm using. I also used to use a Proxxon IB/E.

[powerr]

what was the run out on the bosh colt? I am looking for something new.

[chuck99z28]

I'd like something High Tech. In the $500 range.
With zero runout and varible up to 30,000 rpms or so.
And a 1/8" collet.

That would be cool.

[rowbare]

I'd like something High Tech. In the $500 range.
With zero runout and varible up to 30,000 rpms or so.
And a 1/8" collet.

That would be cool.

It would be cool, but I think you will have to reset your expectations some. $500 can get you an honest runout under a thou at the spindle taper and if you're lucky, your collet won't introduce much more. To reliably get under a tenth at the spindle taper you are probably talking 5 figures... I saw a picture of an inspection certificate for an older Precise spindle recently. Runout at the spindle bore was .00004, with a collet, .0004. Collets for this spindle are $200 each, bearing replacement is in the 4-5k range.

bob

[stevespo]

There are a range of Chinese spindles that may meet your needs. The .8kw with an ER11 collet would do nicely for milling PCBs (and many other materials as well). The top speed is 24K. To get more RPM would require some looking around. Maybe one of the Kress models...

Steve

[chuck99z28]

Ok, in reality, how about less than 0.001" runout. Or around 0.001".
And 20,000-30,000 RPM, And electric, not pneumatic.
And about $500.

So we have commercial rotary tools and routers.
The Wolfgang Spindle.
The growing collection of Chinese spindles.

Anything else other than homemade devices?

Chuck

[ghassall]

In the process of building one of these.
http://www.rcgroups.com/forums/showp...2&postcount=26

Waiting for my motor and speed controller to arrive. Should have been here last week.
With the 890KV motor and 24V should be good for 20K RPM.
Was going to do a belt drive but the direct drive is so simple.

[Jay C]

Keep us posted. I just happen to have an extra K2 mount so who knows I might try this some day

[Drools]

ghassall, I will be following the progress of your spindle. Maybe if the project works out, we could convince someone to just sell the housing. I do not have a lathe so making one of these is out of the question. However I could put one together if I had a housing to work with.

[eSilviu]

Sorry, but you are far beyond today's technology (accesible to anyone)...

http://www.rcgroups.com/forums/showp...2&postcount=26

[ghassall]

Michael Hammer is the guy who cast and build the one in the rcgroups thread. The thread is all about the build of his router.
I took the easy way out and bought a 75mm diameter round extrusion 150mm long. It only cost A$20 which included the cutting charge. Will get two housings and so left over out of that and much simpler then casting one. Will have to try some casting one day.
I have access to large lathe and mill at work so it will be an afterhours project.
Still waiting for my motor and ESC to arrive. Been two weeks now which means it is lost somewhere. HK to Aus is normally a week, max.
I have attached two designs. A square one which will easily bolt to the Z and a round one that can be mounted in an existing router mount.

Gareth