I280 Series




• One-piece iron housing
• Standard ratios is 50:1—right or left hand
• 1.25″ input and 2″ hollow output shaft is standard
• Tapered roller bearings provide increased load capacity and bearing life
• Serviced with 85W140 gear lubricant, run and leak tested before shipment
• The I280 weighs approximately 100/110 lbs. including 88 oz of lubricant

I280 Drawing

I280 Drawing

Rotation Options

Rotation Selection

Ratings Chart

I280 Series

RatioInput RPM
Power & Torque1004001200

1 Thread Worm

50 Tooth Bronze Gear


Input HP1.283.575.64
Output Torque*227711872211293
Input kW0.952.664.21
Output Torque**257321151276


Input HPNA1.872.51
Output Torque*NA90574696
Input kWNA1.391.87
Output Torque**NA1023531
All ratings specified with the #1 shaft as the input.                      *Torque measured in inch-lbs    **Torque measured in N-m

LIMITATIONS ON HORSEPOWER AND TORQUE RATINGS:The horsepower and torque ratings given here are generalizations.  Different conditions for various applications may result in higher or lower horsepower capacities.  Under certain conditions the maximum indicated RPM may be exceeded.  For these reasons the ratings cannot be guaranteed for any application.  Prototype testing should be conducted for each application before production.