4 inch*60 inch precision shaft, grinding parts. turned parts 1) 4 inch * 60 ... roll industry5) Metric ,inch thread on shaft shoulder can be choose6) Step shaft , shaft with slot can be choose7) Producer under ... lathe , 20 Set grinder allow we achieve complet crankcase,shaft ,precision fitting ,heteromorphism parts maching service base on customer ... range0.005 mm/ 0.0002inch 60inch long precision shaft