GEAR COUPLING; TYPE: TOOTHED - TOOTHED; MAXIMUM RATED TORQUE: 52000 NM; LENGTH: 246 MM; MAXIMUM OUTER DIAMETER: 317.5 MM; MAXIMUM SPEED: 3600 RPM; BOTH TOOTHED HUBS; COUPLING FLANGE/FLANGED SLEEVE ACCORDING TO ANSI/AGMA 9008-B00 STANDARD (AGMA 516.01 REVISION) SIZE 4 SERIES 1000; BOLT CENTER DIAMETER: 279.40 MM; BOLT HOLE DIAMETER: 19.050 MM; QUANTITY OF BOLT HOLES: 8; FLANGE WIDTH AT MIDDLE COUPLING: 27 MM; FLANGES AND HUBS MADE OF FORGED SAE 4140 NITRIDED STEEL; BOTH HUBS MUST BE SUPPLIED WITH THE MINIMUM HOLE BUT DESIGNED TO BE MACHINED FOR A MAXIMUM SHAFT DIAMETER OF 150 MM; FLANGES WITH O'RING TYPE CLOSURE IN VIT ON MATERIAL; LUBRICATION HOLES PLACED BETWEEN THE FLANGE AND THE COVER TEETH, OR IN THE FLANGE (IN THIS CASE CONCEALED/RECESSED); THREADED HOLES FOR HUB REMOVAL; EXPOSED SCREWS CALIBRATED WITH UNF THREAD (PREFERABLY), SAE GRADE 5 (CLASS 8.8) OR EQUIVALENT MATERIAL STANDARD; HEXAGON NUTS (PREFERABLY SELF-LOCKING) WITH UNF THREAD (PREFERABLY), SAE GRADE 5 (CLASS 8.8) O