Type VRC4 Accessories Close Coupled Alignment-Free Drive Sizes 237-277 / Dimensions — Inches A VRC CLOSE COUPLED ALIGNMENT-FREE DRIVE/DIMENSIONS DRIVE DIMENSIONS - REFER TO PAGES 227 THRU 228 STANDARD ARRANGEMENTS AVAILABLE TO SUIT: NEMA TD Flange, NEMA TC C-FACE or IEC B5 Flange Motors as shown below Falk Steelflex (T10) Grid Couplings, Falk Wrapflex (R10) Elastomeric Couplings, or Rexnord Omega (E) Elastomeric Couplings B Y Consult the Factory for non-standard arrangements and non-Falk-branded couplings. D B A Y C D 4 SLOTS FOR LIFTING DRIVE (MOTOR END ONLY) MB - MOTOR REGISTER 4 SLOTS FOR LIFTING DRIVE (MOTOR END ONLY) VRC CLOSE COUPLED ALIGNMENT-FREE DRIVE/DIMENSIONS E MA MA E MB - MOTOR REGISTER MC - NO. OF HOLES MD - DIA. TAPPED ME - DEPTH MF - BOLT CIRCLE PD PE PA MC - NO. OF HOLES MD - DIA. TAPPED ME - DEPTH MF - BOLT CIRCLE PD PE PA SOLID LOW SPEED SHAFT, VRC H K SOLID LOW SPEED SHAFT, VRC H G K M G F P M PH PG PJ Loads Generated / Torque Arm Forces, Low-Speed Shaft Forces Max Loads at Drive SizeH 237 243, 247 253, 257 263, 267 273, 277 Torque Arm Force R (lb) 131,933 140,285 153,025 185,635 218,082 Max End of Shaft, VRC † Radial Force F (lb) 133,856 136,092 156,778 190,385 227,993 Bending Moment M (in-lb) 5,158,810 5,502,210 6,790,042 8,559,694 10,898,065 R PH PG Maximum Motor Weight PJ (lb)R 6,800 6,800 6,800 6,800 6,800 NEMA 447-449T 447-449T 447-449T 447-449T 447-449T Available Motors to Suit Adapter IEC 315S-400L 315S-400L 315S-400L 315S-400L 315S-400L Siemens 5011, 588, 5810 5011, 588, 5810 5011, 588, 5810 5011, 588, 5810 5011, 588, 5810 H The loads generated are based on a combination of the most unfavorable conditions of rotation, speed, selection horsepower, motor weight, and a 200% start factor. † Values for R, F, and M are the maximum loads at the position shown during start-up. The loads may NOT be acting in the direction of the arrows. Use the worst case loading condition when designing the driven equipment. Bending Moment is for torque arm located farthest from driven equipment. Crompton 585, 586, 587SDZ 585, 586, 587SDZ 585, 586, 587SDZ 585, 586, 587SDZ 585, 586, 587SDZ Brook & F P 4-HOLES DIA. PF ALTERNATE INSPECTION COVER C 4-HOLES DIA. PF ALTERNATE INSPECTION COVER 284 Catalog 171-110
