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) 
Gear Box Of Irrigation System SYF-1-60=29rpm(60:1 ratio)
(When input velocity is 1740 rpm)
Introduction:
This type of worm gear box has been widely used on the driveline (drive train) of the guts pivot irrigation system and the linear move (later move) irrigation system on North America, European area and Middle East. It employs light weight aluminum alloy case and main transmission parts are manufactured from high strength alloy. By use of lot sealing and dust-proof gadgets it features light in weight, long service existence and good tightness as well.
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 available).
3. Accepts NEMA 56-C face motors with 0.625”shafts, 2” long with 0.19” key slot.
4. Multiple mount bolt patterns 5”×6”, 3.38”×6.38”fit all pivots.
5. High strength light weight aluminum 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 aluminum bronze bull gear.