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The overhung load (OHL) on a gear reducer's shaft subjects the supporting bearings and shaft to stresses. When the OHL exceeds a safe value, the bearings can fail or the shaft can break from bending fatigue.
The OHL capacity in this catalogue is based on bearing life and shaft strength.
Below is a formula that you can use to calculate the required OHL for a specific application.
| OHL Capacity = |
63025 x HP x K x LF x EFF
(D/2) X RPM
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= Lbf |
K = OHL Factor EFF = Reducer Efficiency
HP = Motor Horsepower D = Pitch Diameter of Sprocket/Pulley
LF = Load Location Factor RPM = Speed of Sprocket or Pulley
| OVERHUNG MEMBER |
K FACTOR |
| Sprocket
Pinion
V-Belt Pulley / Sheave
Flat Belt Pulley |
1.00
1.25
1.50
2.50 |
The calculated OHL capacity must be equal to or less than the allowable OHL (radial & axial) values listed on page 25.
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