Gem Bids For Pin-bush Type Flexible Coupling To Transmit 650 Kw @ 1000 Rpm As Per Drg. No. 4-55-810-02086. , Pin-bush Type Flexible Coupling To Transmit 1100 Kw @ 990 Rpm As Per Drg. No. 4-55-820-02087. , Pin-bush Type Flexible Coupling To Transmit 1250 Kw @ 1480 Rpm As Per Drg. No. 3-56-830-00130/01 , Pin-bush Type Flexible Coupling To Transmit 1250 Kw @ 1500 Rpm As Per Drg. No. 3-56-830-00668/02