Not exactly the same. I have a Tormach CNC mill and use the quick change TTS system, which uses a modified 3/4" collet. I also use the same system on the Bridgeport for small endmills and drilling. To fit my coaxial indicator and edge finder I simply bought two TTS 10mm to 3/4" side screw holders. Initial tests showed that with the Bridgeport properly trammed the flat end of the spindle wasn't square. I used an insert toolholder in the machine vice to skim the spindle face and no problems since.
Actually that's not quite true. I've had one major problem with the co-axial indicator and one with the edge finder. The co-axial indicator problem turned out to be the mill had been knocked out of tram. Which just confirms that the Bridgeport isn't the most rigid of mills. The problem with the edge finder was that the indicating ball had come partially unscrewed.
Andrew
