I just got some TTS ER20 chucks from cncmachinetool on eBay. I’ve ordered before and have been satisfied. These latest ones need a 24mm wrench for the body. The old ones (and Tormach’s) are 22mm across the flats on the body. Are the flats on the body supposed to be a standard? I looked on line and all I see are specs for the nut.
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