Morse Taper -2Threads-3/8 x 24 UNF
Drill Chuck Arbors are used to mount a drill chuck or anyother tool which has a female taper shank onto a machinesuch as a drilling machine which has a female taper shanksocket in its workhead.
Precision grinding to very close tolerance with cocentricitycontrolled to within 0.0004 (10 microns) and accuratelygauged self locking tapers ensure close tolerance fit.