Sturdy Rotary Axis for CNC table

[EddyCurrent]

You're talking about 3 requirements.

1. cnc 4th axis
2. Indexer
3. Lathe

From the InTurn web site;

"SPINDLE LOCK:
Custom made articulated pneumatic caliper provided over 100 ft-lbs of holding torque on 90psi shop air.
Cylinder rated for 200PSI leaving a great deal of added capacity, although so far no operations have needed more than 90psi.
DOT approved hardened and ground steel vehicle disk brake rotor is mounted on a thick steel collar and balanced.
Note, the Tail Stock II has a combined spindle damper/lock provided by an internal band brake.
CNC controlled solenoid operated pneumatic valve controls the spindle lock. The valve and a CNC compatible relay are included."

So I'm thinking about a brake disc and caliper from a car scrap yard with an air over oil actuator.

[Boyan Silyavski]

Ok, so 100ft-lbs for a big mill. 135Nm. Then it seems a bicycle hydraulic brake will be sufficient. http://www.bikeradar.com/mtb/gear/ar...-brakes-24345/
That is good.

I like the look of this one + coupled with bike brake some how.http://www.ebay.com/itm/cnc-rotary-t...item232cff456c Still have not figured the dimensions of the shaft and bearings necessary.

[EddyCurrent]

electromagnetic brake or clutch