ER40 Square Collet Chuck
grabcad
I bought one of these on ebay:https://www.ebay.com/itm/SQUARE-ER-40-COLLET-BLOCK-3900-5125/232821017621?epid=697445375&hash=item363536cc15:g:yyAAAOSw~etbMXTb:sc:USPSPriorityFlatRateBox!35640!US!-1:rk:3:pf:0and modeled it in Mastercam for use in simulation.
Download Model from grabcad
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