supply of operational work stores , supply of operational work stores , provision of 01 x 21 ton heavy duty tracked hydraulic excavator fitted with 1 . 20 cum gp bucket with compatible piping kit , with min 5 . 68 m boom , 2 . 22 m arm & 20600 kg . in addition to that provision of 01 x rock breaker compatible with 21 ton hydraulic excavator & max 50 kw hydraulic input , is to be included in the scope of wk . the main frame of excavator shall be strong & of rigid constr . the main frame shall be made of fabricated steel . the stress shall be evenly distributed on steel structure . the frame shall be robust to withstand extreme working stress through out the life span of machine . the frame shall be mounted on tracks fitted with track rollers , idlers , sprockets & tensioned device to avoid slack in track . . each track shall be rotated through high torque pneumatic or hydraulic motor trough planetary reduction gear . the track shall be able to counter rotate for reversing & turning . the end use of the machine is extensive use for road constr / mining / drilling . it shall be used for quarry operations & road formation cutting by breaking the rocks , drilling with suitable attachments & filling the tippers / trucks with buckets . complete equipment warranty for 2 years from date of supply . ( brief tech specification as per mentioned in rfp ) make : tata hitachi / jcb / l&t komatsu / hyundai