- No machining required on the trapezoidal leadscrew - Bearing block to support LFM102,LFM184 and LFM245 leadscrews - No lubrication or maintenance required - Low friction - Precise, low backlash - Materials : Anodised aluminium Drylin® coating Steel locking collar (on fixed bearing) Assembly It is necessary to machine the end of the screw (diam d1), for SLS184 and SLS245