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).
Data sheet listing specifications for 'Shrunk-on' and 'Bolt-on' Flywheel Ring Gears for various vehicle types.
| Identifier | ExFiles\Box 130\3\ scan0034 | |
| Date | 16th December 1938 guessed | |
| "Shrunk-on" and "Bolt-on" Flywheel Ring Gears. BRITISH Passenger Car Types. Name and Model, No. of Teeth, Turn Diam., Outside Diam. A.J.S. 14/75, 11.9, E 121 FR, 14.250, 15.290 Armstrong (Siddeley) 12/50, E 116 F, 13.750, 14.640 " Silver Eagle, E 116 R, 13.750, 14.640 " 14 1937/38, E 116 b'on, 13.750, 14.640 Armstrong (Itshol) 12h.p. 1931, D 124 FR, 14.500, 15.545 " 12h.p. 1931, B 143 FR, 13.234, 14.500 " 12/15 h.p., D 108 FR, 12.520, 13.680 " 15, D 132 R, 15.625, 16.670 " 20, D 148 R, 17.582, 18.625 " 20 h.p., D 156 R, 18.665, 19.685 " 20/15, D 124 R, 14.375, 15.605 " S.29, D 124 R, 14.378, 15.250 " 30, D 164 R, 19.628, 20.625 " ", D 114 R, 13.155, 14.391 Aston Martin, E 96 F, 11.145, 12.175 " ", E 96 R, 11.145, 12.175 Austin 7, A 80 BOH, 9.011 o/d, 10.062 " 7, A 80 flywheel, 9.062 " " 1933, A 80 F, 9.010, 10.052 " 10/4 1932/3, A 93 R, 10.320, 11.375 " 10/4, 1933/4, A 99 R, 11.020, 12.420 " 10/4, 1933/4 AS, A 99 F, 11.020, 12.420 " 10, C 98 R, 11.312, 12.405 " 12, 6-cyl., C 114 R, 13.000, 13.328 " 12/4, 12/6, 1931/4, E 110 R, 12.828, 13.923 " 12/6, 12/4, E 110 F, 12.445, 13.923 " 12/6 1929/30, E 110 R, 13.750, 14.805 " 16/6, 16/4, 18/6, 16/6 †, E 116 R, 13.750, 14.640 " 16/6, 18/6, 1934/5 †, E 116 R, 14.500, 15.525 " 18, 1935, G 118 R, 13.125, 14.325 " 20/6 1929/32, E 119 R, 14.000, 15.020 " 20/6 1936, E 119 FR, 13.882, 14.930 " Taxi, E 126 B b'on, 13.015, 14.500 " 20/4, E 127 R, 14.859, 15.989 " Taxi (nickel st'l), As the Bob, 13.800, 14.672 Beardmore, 100 BOH, b'on, 12.700 Bentley, B 104 F, 15.750, 16.930 B.S.A. 14, G 90 FR, 10.520, 11.428 " 1931 FWB, G 88 R, 10.074, 11.180 " ", G 87 R, 9.895, 11.055 Clyno, D 105 FR, 12.122, 13.305 " ", D 105 ROC, b'on, 11.180 Crossley 14, 5.6, E 113 F, 13.234, 14.300 Crossley 21h.p. 15.6, E 113 FR, 13.234, 14.300 Crossley 19.6, E 113 R, 13.234, 14.300 " 15.7, 1931, E 113 FR, 11.660, 12.680 Daimler (fluid), E 152 R, 17.625, 19.105 " ", F 124 BOH, b'on, 15.640 Daimler 18, 1928, F 135 F, 13.000, 14.180 " 20, 1927, F 124 FR, 13.020, 14.180 Daimler 25, D 135 R, 17.020, 18.000 " ", D 145 R, 17.020, 18.305 " 25, D 137 R, 16.020, 17.255 Daimler AD 23, F 114 R, 13.234, 14.414 Ford 8/10 h.p., F 90 R, 9.035, 10.180 Hillman Wizard Minx, E 98 R, 11.260, 12.180 " 14, 1937-8, E 110 FR, 12.730, 13.680 " ", E 90 R, b'on, 13.700 Humber 14, 1937-8, B 108 BOH, b'on, 14.200 " ", E 108 R, 12.730, 13.680 Humber 12, E 110 FR, 11.200, 12.180 Humber Snipe 80, E 108 R, 12.730, 13.680 " " 1935, S 108 R, 12.730, 13.680 " " 16/60, E 108 FR, 12.730, 13.680 Humber 16/60, E 122 FR, 14.445, 15.430 Humber 10/40, E 122 FR, 14.445, 15.430 Humber 16/60, E 122 R, 14.445, 15.430 " Light 6, E 112 R, 13.300, 14.180 " Snipe 20, 1936, SF 112 R, 13.300, 14.180 Jowett, B 116 R, 13.750, 14.660 " " 7, E 79 R, 9.175, 10.040 Lagonda, E 104 R, 12.122, 13.150 " " 6, 1931/2, E 104 FR, 12.825, 13.875 Lea Francis 12, E 108 FR, 12.730, 13.680 Lea Francis, B 108 BOH, b'on, 13.700 " 14, 1929-30, D 108 R, 12.520, 13.680 " Meadows, D 108 FR, 12.520, 13.680 Lanchester, F 124 FR, 14.715, 15.680 " (fluid), F 124 BOH, b'on, 15.640 " ", E 102 R, 10.951, 12.865 Meadows 11.9, E 108 FR, 12.730, 13.680 " 14/40, E 118 R, 13.582, 14.555 Morgan Runabout, C 83 R, 9.382, 10.545 " ", E 98 R, 9.895, 10.680 Morris Isis, E 84 R, 13.000, 13.930 " " 1931, S 83 II, 9.359, 10.545 Morris Minor, B 110 R, 11.838, 12.850 " Ten, † 6, 1934, C 110 R, 11.245, 12.065 " Oxid. Mir., AE 184 R, 11.212, 12.180 " G Major, E 95 F, 10.990, 11.910 " " 10, 1935, A 80 R, 8.995, 10.166 " 12 Series 2, SB{Mr Bull/Mr Bannister} 104 R, 12.208, 13.180 " 12, Series 2, SB{Mr Bull/Mr Bannister} 98 R, 11.660, 12.680 M.G. "G" 1931, E 104 FR, 10.990, 11.910 Riley 1924/28, C 98 R, 10.990, 12.410 " ", C 98 F, 11.312, 12.405 " 9, 1928/9, AF 108 R, 12.687, 13.680 " 11.9, 12h.p., D 89 R, 12.730, 13.680 " 6, Alpine, E 95 FR, 10.990, 11.910 " 6, Alpine, E 94 R, 10.884, 12.000 Riley 14 h.p., C 95 R, 10.884, 12.000 " 15/6,1936, sd 95 R, 11.115, 11.930 Rolls Royce 20, E 118 F, 13.582, 14.930 Rover 8/9 & 10/25, E 97 R, 11.441, 12.305 " 12, E 108 R, 12.730, 13.680 " Le Mans 8h.p., E 110 FR, 12.730, 13.680 " 16, E 110 R, 13.200, 13.930 " 10, 1935, C 83 R, 9.359, 10.545 Singer 1929, C 83 R, b'on, 10.180 " Junior early, E 92 R, 9.778, 10.645 " late, E 92 R, 10.645, 11.680 " Le Mans,8h.p, SE 92 R, 10.937, 11.680 " Sp{Mr Spinney}'ts'9/10 1933, SE 92 R, 10.937, 11.680 " 9, Sports, E 88 R, 10.012, 11.680 " 10, F 89 R, 10.513, 11.285 " 10 1931, F 89 R b'on, 11.180 " 6, 10/16, F 89 R, 10.513, 11.285 " 12, 1933, SE 88 R, 10.012, 11.332 " 14, SE 88 R, 10.513, 11.555 " 14/16, 1934, SE 91 R, 10.645, 11.535 " 1935, 14/18, SE 91 R, 10.513, 11.535 Standard 9, E 89 R, 10.520, 11.428 " 18/36, 11.6, E 89 R, 11.441, 12.305 Standard 13.9, G 120 BOH, b'on, 15.200 " 9, 15, G 80 FR, 10.520, 11.428 " 12 1934, C 87 FR, 11.441, 12.305 " 9, 16, 1935, C 87 R, 11.441, 12.305 " 20 h.p., 1935/6, C 89 R, 10.308, 11.305 " 12/6, 12/4, C 97 R, 11.411, 12.305 Star SS{S. Smith}, Stan'd.{John DeLooze - Company Secretary} 20, SF 112 F, 12.300, 13.300 Sunbeam 14/4, SF 112 R, 13.300, 14.180 " ", F 112 R, 13.300, 14.180 " ", F 134 FR, 15.250, 16.980 " 20/21 h.p., F 134 R, 15.250, 16.980 Swift 10 h.p., E 114 FR, 13.234, 14.414 " ", E 100 R, 11.660, 12.680 Swift 12, 1929, E 110 R, 12.860, 13.980 Talbot 8/10 h.p., C 95 R, 10.884, 12.000 Triumph 9, D 88 R, 10.074, 11.180 " 12.6, C 100 R, 11.660, 12.680 " 14,60, 1938, E 94 FR, 10.990, 11.910 " 8, 6, 7, 11.9, C 84 R, 9.895, 10.680 " Gloria, B 88 R, 10.145, 11.180 " Gloria (14/6) 1934/5, SB{Mr Bull/Mr Bannister} 94 R, 10.575, 11.555 Trojan, E 126 R, 15.052, 16.175 " ", E 126 FR, 13.234, 14.414 Vauxhall 23/60, E 104 R, 12.208, 13.180 " Cadet, E 104 FR, 12.208, 13.180 " ", B 104 FL, b'on, 13.180 " Light 6, D 112/10 F, 14.750, 15.925 " ", D 112/10 R, 13.010, 15.930 " ", E 110 FR, 10.308, 11.325 Wolseley 6, 16/11,22, E 128 FR, 15.052, 16.175 " 12 Hornet, E 83 R, 11.441, 12.305 " 18, 16/50, E 89 R, 11.441, 12.555 " ", E 128 FR, 15.052, 16.175 " 14 1936, C 89 R, 10.308, 11.305 MARINE SECTION. Brooke Motor Boat, H 224, 26.200, 28.165 American and Continental Vehicle Types. Name and Model, No. of Teeth, Turn Diam., Outside Diam. Alfa Romeo, D 90/3 R, 9.625, 10.845 Auburn 1927/30, E 97 FR, 11.441, 12.305 " 8-63, 6-66, E 121 FR, 14.250, 15.290 " 8-66A, F 108 FR, 12.730, 13.680 " 77, 88, 90, 95, 98, 100, F 97 FR, 11.441, 12.305 Bianchi, E 116 F, 13.750, 14.660 Berliet, E 126 F, 14.750, 15.928 Breda 4, G 136 F, 14.750, 15.928 " 6, E 126 FR, 14.750, 15.928 Bugatti, A 104/3 R, 10.990, 12.500 Buick 1924/28, E 126 FR, 14.445, 15.550 " 1924/28, B 146/10 F, 13.582, 14.640 " All 1934, E 126 FR, 14.750, 15.928 Cadillac 1913/28, E 126 FR, 14.750, 15.928 " 1931, E 123 R, 13.845, 15.550 Chandler 1927-8, F 112 R, 13.000, 14.180 " Royal 8, F 112 FR, 13.000, 14.180 Citroen 11/4 12/24, 120/24 ROC, b'on, 12.000 " 1927/30, 120/24 ROC, b'on, 12.103 " 6r 1929, 120/24 ROC, b'on, 12.103 " 6, ", E 106 F, 12.020, 13.410 " 11.4, 1933, E 98 R, 11.045, 12.450 " ", B 104 F, 11.015, 12.430 " 6, 12/20, D 106 F, 12.027, 13.440 Chevrolet 4, D 110 h'vy, 13.000, 13.930 " 4, D 110 R light, 12.953, 13.930 " 6, D 110 R h'vy, 12.953, 13.930 " 6, B 104 F h'vy, 11.954, 13.180 " 6, B 104 F light, 12.208, 13.180 Chrys'r 80,70,72,75, E 115 FR, 13.582, 14.555 " 58, 50, 52, F 111 R, 13.000, 14.005 " 80, Imp.8, E 124 FR, 14.715, 15.680 " 60, 62, 65, B 114 R, 13.234, 14.414 " Richmond, B 146/10 F, 13.582, 14.640 Airflow (Croydon), Kew, Dodge Sen., Plymouth, Airflow Heston, Royal, B 146/10 F, 13.582, 14.640 Cord 1931/34, E 146/10 F, 13.000, 14.180 C'ler D'ge 1938, D 112 FR, 12.950, 14.180 C'ler C'D 1938, CF 146 SF, 13.562, 14.622 Continental Motors 7Z, 26L, E 97 FR, 11.441, 12.305 " 20L, 28L, F 108 FR, 12.730, 13.680 " 9, 14, 15, 18, 19L, F 120 FR, 13.000, 14.180 " 8S,14S,16S, E 120 FR, 13.987, 15.175 " 12E, E 86 R, 11.200, 12.180 " " 15E, F 105 FR, 12.122, 13.305 " " 20F, D 105 FR, 12.122, 13.305 " " A,W,5,6,Y,7U, E 126 R, 14.180 " " V7,8U,W10, 11U, F 112 FR, 13.000, 14.180 " 12C,12K,12Z,14U, F 112 F, 13.000, 14.180 " 15C,15U,15Z,18U,48U, F 112 FR, 13.000, 14.180 " 22A,25A,26B, F 112 R, 13.000, 14.180 " AC, E 136 FR, 15.582, 16.555 " CE, C4, E4, K4, L4, G 115 FR, 14.555, 17.180 " 6H, E7, 7H, E 126 F, 15.750, 17.180 " C2, 6N, N, R, S, E 126 R, 14.750, 15.928 " C, J, G1, 6T, H2, E 126 F, 14.750, 15.928 " 7N, 7R, 7W, 8R, E 126 R, 14.750, 15.928 " 9A, 9N, 9W, 10N, E 126 F, 14.750, 15.928 " 18R, 20R, 30R, E 126 R, 14.750, 15.928 " 31R, 33R, 35B, E 126 R, 14.750, 15.928 " 6A, F 118 R, 14.000, 14.930 " S, F 132 FR, 15.498, 16.670 Delage, E 114 FR, 13.234, 14.414 De Soto 1928/9, F 115 FR, 13.582, 14.555 " 1929/30, B 146/10 F, 13.582, 14.640 Dodge 6/8,1927/30, F 115 R, 13.582, 14.555 " ", D 122 R, 12.122, 13.305 Dodge 1928/33, B 146/10 F, 13.582, 14.640 " Graham 1930/31, B 122 R, 14.715, 15.680 " 1932/4, B 146/10 F, 13.582, 14.640 Erskine 1924/9, D 105 R, 12.122, 13.305 Essex 1930/1, A 100 R, 11.660, 12.640 " 1924/26, A 100 R, 11.660, 12.680 " Aeroplane 1932/3, A 107 R, 12.510, 13.555 " 6, A 107 FR, 12.310, 13.555 Fargo Truck, B 114 FR, 13.000, 14.005 " ", F 115 FR, 13.582, 14.555 Frizer Nash, AB 104 R, 11.441, 12.305 Fiat Balilla, S 106/3 F, 11.427, 12.577 " 5-14, 5-21C, S 86/3 F, 10.246, 11.465 " 12/25, S 82/3 F, 8.910, 9.880 Ford A, AA{D. Abbot-Anderson}, S 84/2 F, 7.715, 8.405 Franklin 1922/31, E 120 FR, 13.987, 15.175 G.M.C. 1928/30, E 126 FR, 14.750, 15.805 Graham 1930, D 118 F, 14.000, 14.930 " 1930, F 118 R, 14.000, 14.930 Graham Paige, E 114 R, 13.234, 14.414 " 1926/9, E 114 FR, 14.000, 14.930 Hudson 1926/9, F 118 F, 14.000, 14.930 " ", F 118 R, 12.510, 13.555 Hupm'le 6, 1925/31, B 115 R, 13.582, 14.555 Hupm'le 8, 1925/31, F 113 R, 13.234, 14.300 International, F 112 F, 13.000, 14.180 " 1926/30, E 100 R, 11.441, 12.305 " 1926/30, F 121 FR, 14.250, 15.290 " 1923/30, G 136 FR, 14.250, 15.290 " HS{Lord Ernest Hives - Chair}152/151, G 136 FR, 15.750, 17.180 Itala, E 126 FR, 14.750, 15.805 " ", G 136 FR, 14.750, 15.805 Lycoming Motor, F 97 FR, 14.250, 15.290 " ", F 97 R, 11.441, 12.305 La{L. A. Archer} Salle 1926/30, E 112 FR, 13.000, 13.930 Marmon 1927/9, E 96 R, 12.730, 13.680 Marmon 1930/1, E 96 R, 11.200, 12.180 " 41, E 115 FR, 17.495, 18.670 Mercedes-Benz, E 114 R, 13.234, 14.414 Metallurgique, E 126 R, 14.582, 17.960 Oakland 1930, R 117 FR, 13.750, 14.805 Overland 1924/6, E 104 R, 12.122, 13.150 " 6, 96, 98A, A 100 R, 11.660, 12.680 " Calaline, A 100 R, 11.660, 12.680 Opel 10/12 Cadet, Olympic, B 115 10 F, 9.885, 11.295 Packard, F 134 R, 15.750, 16.930 " 1929/31, F 115 R, 13.582, 14.555 Peugeot, D 80/3 R, 9.359, 10.180 " ", E 97 R, 10.180, 11.582 Plymouth 1928/9, F 111 FR, 13.000, 14.005 " 1929, F 115 R, 13.582, 14.555 " 1932/4, E 115 FR, 13.582, 14.555 Renault, F 120 FR, 13.000, 14.180 Reo 1927/30, E 96 R, 12.987, 15.175 " 1927/31, F.G. 120 R, 13.200, 14.180 Studebaker 1921/30, H 136 FR, 15.750, 17.187 " ", H 136 R, 15.687, 17.187 " 1932/33, F 112 FR, 13.000, 14.180 " 1933/34, B 106 FR, 12.122, 13.305 " 1933, B 106 R, 12.122, 13.305 Stewart Truck, E 121 FR, 14.250, 15.290 " ", E 121 R, 14.250, 15.290 Unic Taxicab, E 122/3 R, 13.520, 14.626 Whippet 1926/7, A 99 F, 11.441, 12.555 " ", E 99 R, 11.660, 12.680 " 96A 1926/7, E 99 R, 11.441, 12.555 " 77, B 99 R, 11.320, 12.415 Willys Knight, D 96 R, 11.441, 12.555 " 6, 1932/33, D 96 R, 11.441, 12.555 " Truck 1931, B 105 R, 12.122, 13.150 Knight 1931, B 104 R, 13.000, 14.180 Willys 1930/31, F 112 FR, 12.122, 13.150 BRITISH Commercial Vehicle Types. Name and Model, No. of Teeth, Turn Diam., Outside Diam. A.D.C. and G.M., G 182 F, 21.155, 23.180 A.E.C. Regent, G 138 FR, 15.750, 17.180 " " (nickel steel), G 138 FR, 15.750, 17.180 Albion Victor, B 104 FL, 12.208, 13.180 Bedford 6, '31/33, B 104 FL, 12.208, 13.180 " ", E 112 F, 10.510, 11.555 " 12cwt. 1935, E 112/10 F, 14.750, 15.928 Bean 30 cwt., E 124 FR, 14.715, 15.680 " ", F 132 FR, 15.498, 16.670 Commer B30, E 124 R, 12.730, 13.680 Commer Invader, E 108 BOH, b'on, 13.680 " ", H 116 ROC, b'on, 14.700 " ", H 108 FR, 12.562, 13.680 " ", H 108 FR, 12.730, 13.680 " 8 cwt. 1937/8, A 90 FR, 10.020, 10.875 C'sley Mancunian, F 152 ROC, b'on, 19.200 Daimler, F 152 R, 17.625, 19.105 " CP6, A 164 R, 18.235, 20.155 " CP6, 164 BOH, b'on, 20.105 Daimler CF6, F 152 FR, 18.375, 20.051 Dennis 4 cyl., E 126 F, 14.750, 15.928 Dennis 30 cwt., F 111 FR, 13.000, 14.005 " ", F 111 R, 13.000, 14.005 Foden, H 139 F, 16.375, 17.559 Ford, see models, A 115 R, 12.750, 14.180 " 1928-34, F 112 F, 13.000, 14.180 Ford V8, '29/'36, E 112 R, 12.442, 13.145 Gilford, G 121 R, 14.750, 15.290 " ", E 122 FR, 14.445, 15.430 Guy 30cwt. 29/36, E 122 FR, 14.445, 15.430 " 3 ton, F 118 R, 13.000, 14.005 " Meadows, F 125 BOG, b'on, 15.820 Gardner, G 175, 20.015, 22.075 Halley, Foden, H 136 R, 16.375, 17.555 " ", H 136 FR, 17.555 Leyland Titan, G 136 FR, 15.750, 17.180 " Cub, G 136 F, 15.750, 17.180 " Cub, G 158 F, 18.532, 20.928 " Cub, G 158 R, 18.375, 20.051 M'chester Truck, E 121 R, 14.250, 15.290 M'chester, F 116 R, 14.000, 14.930 Morris Dict. 1934, E 144 BOH, 18.080 Morris 30 cwt., E 108 FR, 13.000, 13.680 Morris 25 cwt., E 110 FR, 13.000, 13.930 " S, C. 1934, G 122 R, 14.445, 15.430 " ", G 122 R, b'on, 15.430 " ", E 141 R, b'on, 17.825 Scammel, G 108 FR, 13.000, 13.680 Thornycroft, G 136 FR, 15.750, 17.180 " ", G 115 FR, 15.582, 16.555 Vulcan B 1926, F 115 FR, 15.235, 16.430 " ", E 130 FR, 15.052, 16.175 " 30 cwt. Victor Engine, E 128 FR, 15.052, 16.175 " ", E 128 F, b'on, 15.820 INSTALLATION—The Flywheel should be machined to the exact turn diameter, which is clearly marked on the face of every ring gear and to such a depth into the face of the Flywheel equal to the depth of the Ring Gear, which is case-hardened all over. Do not attempt to turn the Flywheel to size by caliper measurements. BOLT-ON TYPE GEARS—These Gears are produced in two types:— (a) Ready for immediate fitting. In exact accordance with Bendix recommendations. Many of the Steel Rings have the "flat 45° angle" chamfer in accordance with Bendix practice. These gears being adaptable to either front or rear pinion entry but not reversible on application. (b) Some Gears produced after stripping a broaching reading of 200/250 (40/45 tons tensile). These gears before fitting must be heat treated to 280°/290°C. and shrunk on the flywheel. No attempt must be made to fit these gears without carrying out this procedure. N.B. In future these gears will only be serviced in the hardened state for arrangement with customers who agree to proceed accordingly. DETERMINING PROPER APPLICATION—Care must be exercised to positively identify the correct replacement Gear. (a) If Pinion enters from the front or Engine side of Flywheel, use "F" chamfer. (b) If Pinion enters from the rear or Clutch side of Flywheel, use "R" chamfer. TO AVOID MISAPPLICATION—Note that chamfers are always on the pre-pressure side of the Flywheel Ring Gear teeth, the Ring Gear must be so installed that pinion pressure in cranking the Engine is on the full face, not on the chamfer of Ring Gear Teeth. TO EXPAND THE GEAR BEFORE FITTING—Heat slowly from 260°C. to 287°C. taking about 15 minutes to get uniform heat. Let cool naturally—slowly, in place on flywheel. Gears must not be shrunk or coped with water. To estimate the heat accurately, polish a piece of the gear and take out of the muffle when Brown starts to turn Purple. At correct heat the gear will easily slip over the flywheel with 1/64" to 1/32" to spare. Rapid and irregular heating may scrap the gear. The heating colours are:— Brown at 265°C. Light Purple at 276°C. Full Purple at 287°C. CAUTION—When undertaking the actual work of fitting, be sure to determine that the gear selected is the size most suitable for the Flywheel. Special attention being given to the external diameter and width of the original teeth in the event of two different width gears are needed. Apply for blue print of Special FITTING INSTRUCTIONS. N.B. Diesel Engines must be fitted with our special alloy steel gears, prices on request. N.B.—New sizes are constantly added to production N.B.—We offer a service of rough and machined blanks only where required to suit a variety of applications, made to print or sample. When ordering a new Ring Gear, please state No. of Teeth on flywheel, name of car, and whether bendix pinion enters from (clutch) or front (engine) side of flywheel. | ||