supply of procurement of synchronous shaft,sqrs brake blocks etc., for the use of track machines.procurement of synchronous shaft,sqrs brake blocks etc., for the use of track machines.,synchronous shaft-ii big as per simplex part no c100000113-090-02-00s; make - simpl ex or its equivalent. ] , synchronous shaft-i small as per simplex part no. c100000113-090-01-00s, make- sim plex or its equivalent ] , sqrs brake blocks (material : grey cast iron) as per simplex part no. c100000113 160 2 3 00s, , make : simplex or equivalant ] , centraflex coupler for driving pump as per simplex part no. mms 100 hk, art no:110 00800510003, make- simplex or its equivalent ]