Model:C6136F C6236F C6140F C6240F C6150F,C6250F GUIDEWAYS GROUD 45 TO ENSURE HIGH ACCURACY. GERS IN HEADSTOCK PRECISELY GROUND TO REDUCE NOISE. KINDS OF THREADS. ELECTROMAGNETIC BRAKE CAN BE AMOUNTED WHEN NEEDED,AND COLOR AT USER,SOPTION. 1.SPINDLE BORE DIA 52MM AND THE NOSE CONFORMS TO ISO-C6 2.TAILSTOCK LOCKED BY THREAD AND CAMIOCK. 3.APRONCASE WITH OVERLOAD PROTECTION,WELL SEALED AGAINST LEAKAGE. 4.GUIDEWAY ADOPTIONG UITRASONIC FREQUENCY QUENCHING TO ENSURE A LONG SERIVCE LIFE.