Formulas & Conversions
| Imperial / SI ( Metric ) Conversions | ||||
| Multiply Value By | ||||
| Imperial | SI | IMP > SI | SI > IMP | |
| Power | HP | KW | 0.7457 | 1.341 |
| Torque | LB. IN. | NM | 0.113 | 8.851 |
| Mass | LB | KG | 0.454 | 2.205 |
| Length | IN | MM | 25.4 | 0.0394 |
| Horse Power & Torque | Horse Power & Torque | |||
| Torque Expressed in Lb. Ft. | Torque Expressed in Lb. In. | |||
| HP = | RPM x Torque | HP = | RPM x Torque | |
| 5252 | 63024 | |||
| Torque = | HP X 5252 | Torque = | HP X 63024 | |
| RPM | RPM | |||
| Weights of Steel Plate & Bar | ||||
| Round Bar | 2.67 X Diameter in Inches squared X Length in Feet | |||
| Plate | .2833 X Thickness in Inches X Width in Inches X Length in Inches | |||
| Or | 41 Lbs / Sq. Ft. per inch of thickness , + – | |||
| Overhung Loads | ||||
| An overhung load is a bending force acting on a shaft due to the torque transmitted typically by belt or chain drives | ||||
| O.H.L. = | 126000 X HP | X F X LF | ||
| N X D | ||||
| O.H.L. | Overhung Load in Pounds | |||
| HP | Horse Power | |||
| N | Shaft RPM | |||
| D | Diameter in Inches of Pulley or Sprocket | |||
| F | Service factor | LF | Load Factor | |
| 1.0 For Chain or Gear Drive | 2.0 For drives with severe shock Loads | |||
| 1.5 for Timing Belt Drive | or High Inertia is present | |||
| 2.5 for V Belt Drives | i.e. , Reciprocating Compressors | |||
| 3.5 for Flat Belt Drives | Crushers, Chippers | |||