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| | | Speed Reducers | | |
| | CbN SERIES | 2000 3000 | | |
| | | GEARMOTORS I | | |
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| | | Overhung Load Capacities | | |
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| | | When a sprocket, sheave, pulley or pinion is mounted on any shaft of a reducer, it is necessary to calculate the overhung load. This calculated load must be compared with the gearbox capacity listed to make sure the gearbox will not be overloaded. To calculate the overhung load you need to know the torque or horsepower at the take-off shaft and the location along the shaft at which the load is applied. | | Where: OHL _ Overhung load (pounds) T _ Torque (in. lbs.) r _ Radius of driving member (in.) HP _ Horsepower K _ Drive type factor LLF _ Load location factor | | |
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| | | A. If torque is known: OHL =- | | |
| | | | | | | | | | DRIVING MEMBER | VALUE OF K | | | | Chain Drive | 1.00 | | | | Pinion | 1.25 | | | | Timing Belt | 1.25 | | | | V-Belt | 1.50 | | | | Flat Belt | 2.50 | | | | | | | | | |
| | | T x K x LLF | | |
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| | | r | | |
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| | | B. If horsepower is known: OHL _ 63025 x HP x K x LLF RPM x r OHL capacities are calculated at gear capacity rounded to the closest motor HP at mid shaft. For capacity when HP is known, refer to gearmotor selection tables. | | |
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| | | | | | | | | | LOAD LOCATION | VALUE OF LLF | | | | End of shaft extension Center of shaft extension Shaft extension shoulder | 1.20 1.00 0.80 | | | | | | | | | |
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| | | Single Reduction Overhung Load (lbs.) | | |
| | | | | | | | | | | | | | | Output R.P.M. | REDUCER SIZE | | | | 0 | 1 | 2 | 3 | 4 | 5 | | | | 30 | 31 | 32 | 33 | 34 | 35 | | | | >1000 | 84 | 222 | 230 | 500 | 580 | 802 | | | | 801-1000 | 80 | 229 | 250 | 600 | 615 | 757 | | | | 551-800 | 75 | 240 | 288 | 648 | 674 | 1041 | | | | 451-550 | 54 | 320 | 360 | 668 | 874 | 1234 | | | | 351-450 | 33 | 334 | 370 | 806 | 1244 | 1495 | | | | <350 | 153 | 366 | 457 | 786 | 1560 | 1744 | | | | | | | | | | | | | | |
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| | | Multiple Reduction Overhung Load (lbs.) | | |
| | | | | | | | | | | | | | | | | | | | | | Output R.P.M. | REDUCER SIZE | | | | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | | | | 3012 | 3122 | 313X | 3242 | 325X | 336X | 337X | 34 | 35 | 26 | 27 | 28 | 29 | | | | 301-450 | - | 455 | - | 460 | - | 890 | - | 1755 | 1983 | 4200 | 6500 | - | - | | | | 201-300 | - | 469 | - | 557 | - | 1200 | - | 1829 | 2065 | 4400 | 7000 | 9000 | - | | | | 151-200 | 129 | 591 | 619 | 670 | 699 | 1233 | 1233 | 2013 | 2065 | 4670 | 7500 | 12000 | - | | | | 101-150 | 138 | 603 | 649 | 685 | 692 | 1296 | 1296 | 2015 | 2163 | 4900 | 7500 | 12000 | - | | | | 51-100 | 388 | 701 | 714 | 850 | 856 | 1305 | 1305 | 2472 | 2213 | 5800 | 9000 | 12000 | 14000 | | | | 31-50 | 600 | - | 1030 | - | 1105 | - | 1305 | 3424 | 3733 | 6000 | 11000 | 12000 | 20000 | | | | 16-30 | 600 | - | 1297 | - | 1357 | - | 1905 | 3670 | 4580 | 6000 | 11000 | 12000 | 20000 | | | | <15 | 600 | - | 1345 | - | 1610 | - | 1905 | 4340 | 4580 | 6000 | 11000 | 12000 | 20000 | | | | | | | | | | | | | | | | | | | | | |
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| | | I___I___I_I_----_I_I_----_I_I_----_I__I__I_----_I_---- ■_----Minimum OHL capacity based on minimum recommended sheave diameter and unit driven by maximum motor HP. | | |
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| | | 237 | | |
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