From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Specification sheet for Medium and Heavy Duty 'David Brown' cone-ring flexible couplings.
| Identifier | ExFiles\Box 159\6\ scan0056 | |
| Date | 1st May 1938 guessed | |
| Page 5 MEDIUM DUTY TYPE [Diagram of a cone-ring flexible coupling] Labels on diagram: C, B, C, E, F, G, A DIA, D DIA DRIVING HALF DRIVEN HALF "DAVID BROWN" FLEXIBLE COUPLINGS (Cone-Ring Type) PRINCIPAL DIMENSIONS (Inches) MAXIMUM SHAFT DIAM. | ¾ | 1 | 1¼ | 1½ | 1¾ | 2 | 2¼ | 2½ | 3¼ | 3¾ | 4½ | 5¼ | 6¼ | 7½ | 8 | 9 | 10 A | 1.3 | 2 | 2.5 | 2.75 | 3.25 | 3.8 | 4.6 | 5 | 5.8 | 7 | 8 | 9 | 10 | 11.5 | 13 | 14.5 | 16 | 18 B | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 C | 1.3 | 1.6 | 1.9 | 2.2 | 2.4 | 2.7 | 3 | 3.5 | 4 | 4.6 | 5.2 | 5.8 | 6.5 | 7.4 | 8.3 | 9.3 | 10.4 | 11.5 D | 3.5 | 5 | 5.3 | 5.8 | 6.75 | 7.6 | 8.5 | 10 | 11 | 13 | 14.6 | 16.5 | 18 | 21 | 23.5 | 26 | 29 | 32.5 E | 1.0 | 1.1 | 1.1 | 1.1 | 1.4 | 1.4 | 1.4 | 2.2 | 2.2 | 2.2 | 3 | 3 | 3 | 4.1 | 4.1 | 4.1 | 5.5 | 5.5 F | 1.1 | 1.4 | 1.4 | 1.4 | 1.7 | 1.7 | 1.7 | 2.6 | 2.6 | 2.6 | 3.5 | 3.5 | 3.5 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 G | 1.1 | 1.4 | 1.1 | 0.8 | 1.1 | 1.0 | 0.7 | 2.0 | 1.7 | 1.1 | 2.1 | 1.8 | 1.1 | 2.0 | 1.1 | 0.4 | 1.7 | 0.6 No. of Pins | 3 | 2 | 3 | 4 | 3 | 4 | 5 | 4 | 5 | 6 | 5 | 6 | 7 | 5 | 6 | 7 | 6 | 7 Rings per Pin | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 TORQUE CAPACITY* MAXIMUM SHAFT DIAM. | ¾ | 1 | 1¼ | 1½ | 1¾ | 2 | 2¼ | 2½ | 3¼ | 3¾ | 4½ | 5¼ | 6¼ | 7½ | 8 | 9 | 10 Normal H.P. per 100 r.p.m. | 0.295 | 0.625 | 1 | 1.5 | 2.6 | 4.05 | 5.75 | 13.8 | 18.95 | 28.5 | 47.5 | 65 | 85 | 131.5 | 184 | 238.5 | 402.5 | 532.5 Maximum r.p.m. Cast Iron body | 6550 | 4580 | 4420 | 4000 | 3400 | 3020 | 2700 | 2300 | 2090 | 1760 | 1570 | 1390 | 1270 | 1090 | 975 | 880 | 790 | 705 * Each size is capable of 100% momentary overload. Where a drive is subject to a cyclic variation of torque, the coupling size should be based on the H.P. corresponding to the maximum torque. APPROXIMATE WEIGHTS MAXIMUM SHAFT DIAM. | ¾ | 1 | 1¼ | 1½ | 1¾ | 2 | 2¼ | 2½ | 3¼ | 3¾ | 4½ | 5¼ | 6¼ | 7½ | 8 | 9 | 10 Total Weight (lb.) | 4 | 9 | 11 | 14 | 23 | 31 | 43 | 80 | 103 | 155 | 250 | 334 | 417 | 692 | 910 | 1170 | 1723 | 2273 As improvements in design are continually being made, this specification is not to be regarded as binding in detail, and dimensions are subject to alteration without notice. Page 6 HEAVY DUTY TYPE [Diagram of a cone-ring flexible coupling] Labels on diagram: C, B, C, E, F, G, A DIA, D DIA DRIVING HALF DRIVEN HALF "DAVID BROWN" FLEXIBLE COUPLINGS (Cone-Ring Type) PRINCIPAL DIMENSIONS (Inches) MAXIMUM SHAFT DIAM. | ¾ | 1 | 1¼ | 1½ | 1¾ | 2 | 2¼ | 2½ | 3¼ | 3¾ | 4½ | 5¼ | 6¼ | 7½ | 8 | 9 | 10 A | 1.3 | 2 | 2.5 | 2.75 | 3.25 | 3.8 | 4.6 | 5 | 5.8 | 7 | 8 | 9 | 10 | 11.5 | 13 | 14.5 | 16 | 18 B | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.125 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 C | 1.3 | 1.6 | 1.9 | 2.2 | 2.4 | 2.7 | 3 | 3.5 | 4 | 4.6 | 5.2 | 5.8 | 6.5 | 7.4 | 8.3 | 9.3 | 10.4 | 11.5 D | 3.5 | 5 | 5.3 | 5.8 | 6.75 | 7.6 | 8.5 | 10 | 11 | 13 | 14.6 | 16.5 | 18 | 21 | 23.5 | 26 | 29 | 32.5 E | 1.0 | 1.1 | 1.1 | 1.1 | 1.4 | 1.4 | 1.4 | 2.2 | 2.2 | 2.2 | 3 | 3 | 3 | 4.1 | 4.1 | 4.1 | 5.5 | 5.5 F | 1.1 | 1.4 | 1.4 | 1.4 | 1.7 | 1.7 | 1.7 | 2.6 | 2.6 | 2.6 | 3.5 | 3.5 | 3.5 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 G | 1.1 | 1.4 | 1.1 | 0.8 | 1.1 | 1.0 | 0.7 | 2.0 | 1.7 | 1.1 | 2.1 | 1.8 | 1.1 | 2.0 | 1.1 | 0.4 | 1.7 | 0.6 No. of Pins | 6 | 4 | 6 | 8 | 6 | 8 | 10 | 8 | 10 | 12 | 10 | 12 | 14 | 10 | 12 | 14 | 12 | 14 Rings per Pin | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 TORQUE CAPACITY* MAXIMUM SHAFT DIAM. | ¾ | 1 | 1¼ | 1½ | 1¾ | 2 | 2¼ | 2½ | 3¼ | 3¾ | 4½ | 5¼ | 6¼ | 7½ | 8 | 9 | 10 Normal H.P. per 100 r.p.m. | 0.59 | 1.25 | 2 | 3 | 5.2 | 8.1 | 11.5 | 27.6 | 37.9 | 57 | 95 | 130 | 170 | 263 | 368 | 477 | 805 | 1065 Maximum r.p.m. Cast Iron body | 6550 | 4580 | 4420 | 4000 | 3400 | 3020 | 2700 | 2300 | 2090 | 1760 | 1570 | 1390 | 1270 | 1090 | 975 | 880 | 790 | 705 * Each size is capable of 100% momentary overload. Where a drive is subject to a cyclic variation of torque, the coupling size should be based on the H.P. corresponding to the maximum torque. APPROXIMATE WEIGHTS MAXIMUM SHAFT DIAM. | ¾ | 1 | 1¼ | 1½ | 1¾ | 2 | 2¼ | 2½ | 3¼ | 3¾ | 4½ | 5¼ | 6¼ | 7½ | 8 | 9 | 10 Total Weight (lb.) | 4 | 9 | 11 | 14 | 22 | 30 | 41 | 77 | 99 | 151 | 242 | 324 | 385 | 675 | 891 | 1160 | 1679 | 2220 As improvements in design are continually being made, this specification is not to be regarded as binding in detail, and dimensions are subject to alteration without notice. Printed in England | ||