Specification‎:‎ Rolling Block Material‎:‎ bearing steel Total length‎:‎270mm Features‎:‎ Screw are used in TBI screw‎,‎ good finish‎,‎ uniform hardness‎,‎ high accuracy‎.‎ Between the feed screw nut having a spiral groove provided with a ball ‎(‎as intermediate transmission member‎)‎‎,‎ to reduce friction‎.‎ High transmission efficiency‎,‎ high positioning accuracy‎,‎ long service life‎,‎ transmission reversibility‎.‎ Caution‎:‎ Do not unscrew the screw nut ‎(‎‎(‎to prevent detachment screw‎)‎