Model Numbers:
SYF-1-20=87rpm(20:1 ratio)
SYF-1-30=58rpm(30:1 ratio)
SYF-1-40=43rpm(40:1 ratio)
SYF-1-50=35rpm(50:1 ratio)
SYF-1-58=30rpm(58:1 ratio)
SYF-1-60=29rpm(60:1 ratio)
(When input quickness is 1740 rpm)
Introduction:
This kind of worm gear box has been widely used on the driveline (drive train) of the center pivot irrigation system and the linear move (later move) irrigation system on THE UNITED STATES, Gear Box Of Irrigation System European area and Middle East. It employs aluminum alloy case and major transmission parts are produced from high power alloy. By use 
of lot sealing and dust-proof devices it features light in weight, long service life and good tightness aswell.
Performance:
1. Torque capacity: 4,500 lb.in (510 N.m).
2. Ratio: 20:1,?30:1,?40:1,?50:1,?58:1, 60:1 (others offered).
3. Accepts NEMA 56-C encounter motors with 0.625”shafts, 2” long with 0.19” key slot.
4. Multiple attach bolt patterns 5”×6”, 3.38”×6.38”fit all pivots.
5. High strength aluminium bronze worm gear.
• Multiple ratios available
• Aluminum gearbox housing.
• Includes keyway coupling for the motor to gearbox connection.
• Contains 2-seal savers for the output shafts.
• High strength aluminium bronze bull gear.