Planetary Reducers - Browning - #101

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D-7 ® Overhung Load Scoop Reducers OVERHUNG LOAD When a sprocket, sheave, pulley, or pinion is mounted on the output 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 output shaft and the location along the shaft at which the load is applied. A. If torque is known: OHL = B. If horsepower is known: OHL = T x K x LLF r 63025 x HP x K x LLF RPM x r 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 Output Shaft Overhung Load Capacity (lbs.) DRIVING MEMBER VALUE OF K Chain Drive 1.00 Pinion 1.25 V-Belt 1.50 Flat Belt 2.50 LOAD LOCATION VALUE OF LLF End of shaft extension 1.20 Center of shaft extension 1.00 Shaft extension shoulder 0.80 Output R.P.M. SIZE 21 22 23 24 25 26 27 28 151-185 1700 1700 4675 4675 6800 11100 - - 121-150 1820 1820 5000 5000 7280 11875 - - 91-120 1970 1970 5330 5330 7750 12700 21750 27500 71-90 2170 2170 5850 5850 8600 14000 23200 30500 56-70 2330 2330 6240 6240 9075 14850 24450 33250 41-55 2515 2515 6675 6675 9700 15875 27100 35150 34-40 2775 2775 7300 7300 10600 17200 29000 38600 28-33 3000 3000 7800 7800 11350 18400 30350 41250 24-27 3225 3225 8350 8350 12150 19850 32650 43000 18-23 3400 3400 8750 8750 12725 20850 34750 45750 15-18 3650 3650 9350 9350 13600 22200 38000 49300 12-15 3950 3950 10000 10000 14550 23750 40600 52000 9-11 4350 4350 10900 10900 15875 25950 43450 57150 5-8 4800 4800 11350 11350 16900 27800 44750 60025 3-4 6000 6000 11350 11350 16900 34850 43200 60025 <3 7265 7265 11350 11350 16900 34850 43200 60025