＜About calculation coefficients＞

■Service factor (Sf)

For gearmotors and reducers, calculated assuming 10 operating hours per day under a light shock load. For more rigorous operating conditions, use a service factor from the following table to correct the load torque. Load status Service factor(Sf) Example application Less than 3 operating hours per day 3 to 10 operating hours per day More than 10 operating hours per day Average load 1 1 1 Conveyors (average loads), screens, mixers (low viscosity), water treatment equipment (light loads), machine tools (feed shaft), elevators, extruders, distillation machines Light shock load 1 1 1.25 Conveyors (uneven or heavy load), mixers (high viscosity), vehicle equipment, water treatment equipment (medium loads), hoists (light loads), paper manufacturing equipment, feeders, food product equipment, pumps, precision machinery, textile machinery Heavy shock load 1 1.25 1.5 Hoists (heavy loads), hammer mills, metalworking machinery, crushers, tumblers

■Correction coefficient (C)

Change the correction coefficient applied when calculating the inertia moment I {GD2} according to the operating conditions. Coupling method Startup frequency Correction coefficient If there is no backlash during straight-line operation 70 cycles/day or less 1 More than 70 cycles/day 1.5 If there is backlash when applying chain 70 cycles/day or less 2 More than 70 cycles/day 3

■Coefficient (K1,K2)

Coupling method and load position coefficients are shown respectively as K1 and K2 in the table. Coupling method K1 Chain/timing belt 1.00 Gear 1.25 V belt 1.50 Load position K2 Shaft base 0.75 Shaft center 1.00 Shaft end 1.50

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