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Squirrel-cage motors Technical information Mechanical design 2 ■ Maximum cantilever forces Maximum cantilever forces, basic design The values for the maximum cantilever force F Q (N) with a radial load are based on the assumption that the line of force F Q (i.e. the centreline of the pulley) is still within the free shaft extension (dimension x). M1-5180 x Dimension x (mm) is the distance from the shoulder of the shaft to the line of action of the force F Q . Dimension x max. is thus the length of the shaft extension. The pretensioning factor c is an empirical value determined by the belt manufacturer. It can be approximated as follows: For normal flat leather belts with an idler pulley c = 2; for V-belts c = 2 to 2.5; for special synthetic belts (depending on the type and load) c = 2 to 2.5. The peripheral force F u (N) can be calculated from the following equation u 2 10 7 P F ¸ n¸D F u P n D Peripheral force in N Motor rated output (transmitted power) in kW Motor rated speed in rpm Belt pulley diameter in mm Total cantilever force F Q = c · F u Standard belt pulleys conforming to DIN 2211, Sheet 3. The maximum cantilever forces for 60 Hz are approx. 80% of the 50 Hz values (please enquire). Maximum cantilever forces for 50 Hz, basic version Valid is: x 0 values for x = 0 and x max. values for x = l (l = shaft extension) For motors Max. cantilever force at x 0 Max. cantilever force at x max. Size Type Type 56 M 2 4 6 63 M 2 4 6 71 M 2 4 6 8 80 M 2 4 6 8 90 S 90 L No. of poles 2 4 6 8 100 L 2 4 6 8 112 M 2 4 6 8 132 S 132 M 160 M 160 L 180 M 180 L 2 4 6 8 2 4 6 8 2 4 6 8 200 L 2 4 6 8 225 S 225 M 2 4 6 8 1LA5 1LA7 1LA9 1MA6 1MA7 1LA6 1LG4 1LG6 1MJ6 1MJ7 1LA5 1LA7 1LA9 1MA6 1MA7 1LA6 1LG4 1LG6 N N N N N N 270 350 415 270 350 415 415 530 630 690 485 625 735 815 725 920 1090 1230 1030 1310 1550 1720 1010 1270 1520 1690 1490 1940 2260 2500 1540 2040 2330 2660 2000 2350 2800 3050 2550 3350 3900 4150 3050 3750 4550 4850 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 1780 2240 2550 2860 2380 3050 3500 3800 2820 3500 4050 4500 – – – – – – 415 530 630 – 485 625 735 – 725 920 1090 1230 1030 1310 1550 1720 1680 1960 2140 2450 2250 2720 3100 3400 2800 3330 3750 3750 2000 2350 2800 3050 2550 3350 3900 4150 3050 3750 4550 4850 240 305 360 240 305 360 355 450 535 585 400 515 605 675 605 775 910 1030 840 1060 1250 1400 830 1040 1240 1380 1180 1530 1780 1980 1210 1590 1820 2080 1550 1950 2250 2500 2100 2750 3200 3450 2550 2950 3600 3900 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – 1410 1820 2120 2330 1930 2530 2930 3210 2290 2760 3240 3500 1MJ6 1MJ7 – – – – – – 355 450 535 – 400 515 605 675 605 775 910 1030 840 1060 1250 1400 1490 1580 1720 1950 1820 2170 2420 2700 2250 2600 2900 2900 1550 1950 2250 2500 2100 2750 3200 3450 2550 2950 3600 3900 Maximum cantilever forces for 50 Hz, basic version Valid is: x 0 values for x = 0 and x max. values for x = l (l = shaft extension) For motors Max. cantilever force at x 0 Max. cantilever force at x max. Size Type Type 250 M 2 4 6 8 280 S 280 M 315 S 315 M No. of poles 2 4 6 8 2 4 6 8 315 L 2 4 6 8 315 to 450 2 to 8 1LG4 1LG6 1MA6 1MJ6 1MJ7 1LG4 1LG6 1MA6 N N N N N N 3190 4000 4700 5200 4000 8400 9700 10750 4750 9100 10700 11600 4000 8400 9700 11100 1LA8 see diagrams page 2/38 3650 4400 5350 5700 3350 8400 10000 11000 3950 9900 12100 13300 3100 8800 11400 12500 1MJ8 1MJ1 1 ) 1) Data for 1MJ1 available soon 3650 4400 5350 5700 8100 9700 11700 12800 9000 13100 15600 16900 8800 24000 25000 26000 2530 3350 3900 4400 3250 7000 8100 9000 3890 7300 8700 9600 3280 7500 9100 10200 1LA8 see diagrams page 2/38 2950 3600 4350 4700 2800 7200 8900 9850 3350 8100 9900 10900 2700 7450 9600 10500 1MJ8 1MJ1 1 ) 1MJ6 1MJ7 2950 3600 4350 4700 6700 8050 9700 10600 7600 10800 12800 13900 7600 12000 12000 12000 For 1LA8 motors with horizontal design, the permitted cantilever forces are given in dependence on the axial forces. Please note that in the case of the IM B 6, IM B 7, IM B 8, IM V 5, and IM V 6 types of construction, the belt tension is only allowed to act parallel to or towards the mounting plane and the feet must be braced. Both feet must be secured for foot-mounting types of construction. Refer to pages 2/37 to 2/39 if the cantilever forces are higher than those listed above. 2/36 Siemens M 11 · 2003/2004
■ Maximum cantilever forces (continued) Bearings for increased cantilever forces Maximum cantilever forces for 50 Hz for type 1LA, 1MA, and 1MJ motors Deep-groove bearings at drive-end (DE) – Order Code K20 For motors Max. cantilever force at F Q Size Type Number of at at 1LA5 . . . poles x 0 x max. 1LA6 1LA7 . . . 1LA9 . . . 1MA6 . . . 1MA7 1MJ6 . . . 1MJ7 . . . N N 100 . . . . 10 . 2 4 6 8 112 . . . . 113 2 4 6 8 132 . . . . 13 . 2 4 6 8 160 . . . . 16 . 2 4 6 8 180 . . . . 18 . 2 4 6 8 200 . . . . 20 . 2 4 6 8 1680 1960 2140 2450 1680 1960 2140 2450 2250 2720 3100 3400 2800 3330 3750 3750 3700 4450 5100 5550 5200 6450 7300 7900 1490 1580 1720 1950 1490 1580 1720 1950 1820 2170 2420 2700 2250 2600 2900 2900 3000 3600 4150 4500 4300 5350 6100 6550 F Q M1-5180 x Squirrel-cage motors Technical information Mechanical design Maximum cantilever forces for 50 Hz for type 1LA, 1MA, and 1MJ motors Parallel roller bearings at drive-end (DE) – Order Code K20 For motors Max. cantilever force at F Q Size Type Number of at at 1LA5 . . . poles x 0 x max. 1LA6 . . . 1MA6 . . . 1MJ6 . . . 1MJ7 . . . . N N 225 . . . . 22 . 2 4 6 8 250 . . . . 25 . 2 4 6 8 8100 9800 11200 12200 9600 11600 13200 14400 6800 7800 8800 9700 7900 9600 10800 11800 280 1 ) . . . . 28 . 2 10000 8400 315 S 1 ) . . . . 310 2 12000 10200 315 M 1 ) . . . . 313 315 L 1 ) . . . . 316 2 11800 10200 . . . . 317 (horizontal motors) Please note that in the case of the IM B 6, IM B 7, IM B 8, IM V 5, and IM V 6 types of construction, the belt tension is only allowed to act parallel to or towards the mounting plane and the feet must be braced. 2 Maximum cantilever forces at 50 Hz for type 1LG motors Parallel roller bearings at drive-end (DE) – Order Code K20 Valid is: x 0 values for x = 0 and x max. values for x = l (l = shaft extension) For motors Max. cantilever force at F Q Size Type Number of at at 1LG4 . . . poles x 0 x max. 1LG6 . . . N N 180 M 180 L . . . . 18 . 2 4 6 8 200 L . . . . 20 . 2 4 6 8 225 S 225 M . . . . 22 . 2 4 6 8 250 M . . . . 25 . 2 4 6 8 280 S 280 M 315 S 315 M 4550 5650 6350 6950 6600 8200 9300 10100 7500 9150 10400 11300 9100 11300 12800 14100 3600 4050 4050 4050 5350 6850 6300 7400 6250 7200 7400 7350 7300 9300 10500 10500 . . . . 28 . 2 11400 9350 . . . . 310 . . . . 313 2 14700 12300 315 L . . . . 316 . . . . 317 2 14600 12700 1) Does not apply to 1MJ motors with frame sizes 280 to 315 (standard design). Maximum cantilever forces at 50 Hz for type 1LG motors Deep-groove bearings strengthened on both sides DE/NDE – Order Code K36 Valid is: x 0 values for x = 0 and x max. values for x = l (l = shaft extension) For motors Max. cantilever force at F Q Size Type Number of at at 1LG4 . . . poles x 0 x max. 1LG6 . . . N N 180 M 180 L . . . . 18 . 2 4 6 8 200 L . . . . 20 . 2 4 6 8 225 S 225 M . . . . 22 . 2 4 6 8 250 M . . . . 25 . 2 4 6 8 280 S 280 M 315 S 315 M 3280 4150 4750 5250 4350 5550 6350 7000 4850 6100 7050 7750 5800 7400 8500 9350 . . . . 28 . 2 – – . . . . 310 . . . . 313 315 L . . . . 316 . . . . 317 2600 3430 3950 4050 3500 4550 5350 5900 3950 4850 5650 6150 4600 6050 7050 7850 2 5650 4650 2 5350 4650 Siemens M 11 · 2003/2004 2/37
Page 1 and 2: Catalogue M 11 • 2003/2004 MOTORS
Page 3 and 4: Low-Voltage Motors Catalogue M 11 2
Page 5 and 6: 1/3 Siemens M 11 · 2003/2004 1/3
Page 7 and 8: Squirrel-cage motors Introduction L
Page 9 and 10: Squirrel-cage motors Technical info
Page 43: Squirrel-cage motors Technical info
Page 59 and 60: ■ Brakes (continued) Performance
Page 69 and 70: Squirrel-cage motors 1LA and 1LG se
Page 71 and 72: Squirrel-cage motors 1LA · Alumini
Page 81 and 82: Squirrel-cage motors 1LA/1LG · Cas
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Page 85 and 86: Squirrel-cage motors 1LG · Cast ir
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Squirrel-cage motors 1LA/1LG · Spe
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Squirrel-cage motors 1MA¼increased
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Squirrel-cage motors 1MJ¼explosion
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Rated output Size Order No. Order N
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Squirrel-cage motors Dimensions Dim
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Squirrel-cage motors Dimensions 1LA
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, Squirrel-cage motors Dimensions
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Squirrel-cage motors Accessories an
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Squirrel-cage motors Repair parts 1
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Squirrel-cage motors Appendix Envir
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Squirrel-cage motors Appendix Overv
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At www.siemens.com/ automation/part
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Squirrel-cage motors Appendix · Se
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Page A A&D in the WWW A/6 A&D Mall
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Squirrel-cage motors Appendix Order
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Squirrel-cage motors Appendix Notes
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Catalogs of the Automation and Driv
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Low-Voltage Motors Catalogue M 11
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