3 flex coupler cnc mill stepper shaft ball screw

What is for sale: 3 flex coupler cnc mill stepper shaft ball screw

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*************************** Brand New Never Installed ********************************************
Lot of three Flexible Couplers.( 1/4, 5/16, 3/8 or 6mm,7mm,8mm,9mm,and 9.5mm)
Prefered design as they do not damage the shafts
Absolutely no backlash and no need for lubricating.
It accepts a precision 1/4" motor shaft for stepper or servo motors.
You can bore existing 1/4" hole up to 3/8" and the coupler will operate perfectly.
For Metric application it will accept originally 6mm and can be bore up to 9.5mm
Static break torque 10 newton meter = 1 416.119 322 781 ounce inch
Replaceable Acetal disk if worn out (will be fine for 5-10 years depending on usage).
Expensive when bought at a specialized store or through company.