EP-SYF-3M Center-Drive Steel Gear Motor — Six-Pole Ultra-Slow Option

EP-SYF-3M Center-Drive Steel Gear Motor — Product Overview

Maximum Efficiency, Maximum Torque, Integrated Motor

The EP-SYF-3M is the flagship center-drive gear motor in Korea Ever-Power’s irrigation range — the only product that combines 90% steel-gear efficiency, 1,130 Nm torque capacity, and a factory-integrated AC motor in a single turnkey unit. It delivers the energy savings and torque advantages of the EP-SYF-3 steel gearbox without requiring separate motor sourcing, coupler installation, or alignment verification. Bolt it to the tower frame, connect three-phase power, attach the driveline, and irrigate.

The Only Gear Motor with a 6-Pole Option

Every other Korea Ever-Power irrigation gear motor uses standard 4-pole motors (1,740 rpm at 60 Hz). The EP-SYF-3M offers an exclusive fourth variant — the EP-SYF-3M-40-6P — equipped with a 6-pole motor that runs at approximately 1,160 rpm. Combined with the 40 : 1 ratio, this produces just 28 rpm output: the slowest available output speed in Korea Ever-Power’s entire irrigation catalog. This ultra-slow mode enables precision low-application-rate irrigation for arid-climate water conservation, drip-supplement pivot systems, and chemigation applications where uniform, slow distribution is critical.

Ratio-Matched Motor Selection

Korea Ever-Power pairs each ratio with an optimally sized motor: 1½ HP for the 20 : 1 fast-advance ratio, 1 HP for the 30 : 1 standard ratio, ¾ HP for the 40 : 1 standard 4-pole variant, and ½ HP for the 6-pole ultra-slow variant. This precision matching means every motor operates at its most efficient load point — no oversizing waste, no undersizing risk.

Complete Specification — Four Variants Including 6-Pole

Exclusive 6-Pole Motor Option — 28 RPM Ultra-Slow Precision Irrigation

The EP-SYF-3M-40-6P is available only in the EP-SYF-3M range — no other Korea Ever-Power irrigation gear motor offers a 6-pole configuration. Understanding when 28 rpm matters clarifies this variant’s unique value:

The Highest-Torque Gear Motor in the Irrigation Range

1,130 Nm + Integrated Motor = Turnkey Heavy-Duty

The EP-SYF-2M worm gear motor delivers 510 Nm. The EP-SYF-3M delivers 1,130 Nm — 2.2× more torque from an integrated unit that is ready to install. For irrigation companies building heavy-duty pivot systems with long spans and heavy towers, the EP-SYF-3M eliminates both the torque limitation of worm-gear motors and the installation complexity of separate gearbox-and-motor assemblies. One unit, one shipment, one installation step.

90% Efficiency Carries Through to the Motor

The integrated motor is factory-matched to the steel gearbox’s efficiency characteristics. Because only 10% of input power is lost in the gear mesh (versus 40–60% in worm gear motors), the EP-SYF-3M’s motor can be smaller for the same output performance. Smaller motors draw less current, generate less heat, and require less electrical infrastructure. The 2.3 AMP full-load draw at rated voltage is identical to the worm-gear EP-SYF-2M — but the EP-SYF-3M delivers 2.2× more output torque from that same current.

Four Motor-Ratio Combinations

The EP-SYF-3M offers four variants where the EP-SYF-2M worm motor offers six. The trade-off is deliberate: the steel gear architecture covers the 20 : 1 to 40 : 1 range where heavy-duty performance matters most, and adds the exclusive 6-pole variant that no worm-gear motor can match. For ratios above 40 : 1 (50, 58, 60 : 1), the worm-gear EP-SYF-2M remains the appropriate choice.

EP-SYF-3M vs. EP-SYF-2M — Steel Gear Motor or Worm Gear Motor?

Field Application Scenarios

Commercial Long-Span Pivot Systems

Large commercial pivots with 400+ meter spans and heavy galvanized steel towers are the EP-SYF-3M’s primary market. The 1,130 Nm torque handles the driveline loads that long outermost spans generate, and the 90% efficiency reduces the electricity cost of running these large systems thousands of hours per season. The pre-integrated motor eliminates the motor-selection guesswork that large-scale irrigation companies face when specifying separate gearboxes and motors for global deployment.

Arid-Climate Precision Irrigation (6-Pole)

In water-scarce regions like Saudi Arabia, Central Asia, and Australia’s interior, every drop of irrigation water must be absorbed by the soil rather than lost to runoff. The EP-SYF-3M-40-6P’s 28 rpm output moves the pivot arm 35% slower than the standard 43 rpm, giving the soil more time to absorb water before the next sprinkler pass. This ultra-slow mode reduces surface runoff, improves water use efficiency, and enables lower application rates that match the soil’s infiltration capacity.

Chemigation & Fertigation Applications

Pivot systems that inject chemicals or liquid fertilizer through the sprinkler heads require uniform, controlled application rates. The 6-pole EP-SYF-3M-40-6P’s 28 rpm produces the slowest, most uniform tower advance of any Korea Ever-Power gear motor, minimizing the application-rate variability that causes chemical hot-spots and under-treated zones. For farms applying expensive crop protection chemicals through the pivot, this precision directly improves chemical efficacy and reduces waste.

Why Choose the EP-SYF-3M

Installation & Maintenance

Mounting Procedure

❶ Bolt the EP-SYF-3M to the pivot tower frame using the 5″×6″ mount pattern. The unit weighs 27 kg — use two-person lift or a hoist for safe handling.

❷ Connect three-phase power wiring to the junction box. Verify voltage setting (460V or 380V) and confirm rotation direction.

❸ Connect both output shafts to the irrigation drive shaft assemblies.

❹ If required, install external brake mechanism (steel gears do not self-lock).

❺ Verify oil level (shipped pre-filled, 2.0 L). Energize and test both rotation directions.

Maintenance Schedule

◆ Start of irrigation season — Check oil level; inspect seals and junction box; verify brake function.

◆ Every 1,500 hours / annually — Full oil change (2.0 L). Inspect motor wiring for moisture damage.

◆ Every 3,000 hours — Inspect steel gear tooth surfaces; check motor bearing noise.

◆ End of season — Top off oil; weatherproof junction box; inspect mounting bolts.

Companion Products & System Components

Steel Gearbox-Only Version

For operators who prefer to source motors separately, the EP-SYF-3 gearbox-only provides the same 90% efficiency and 1,130 Nm torque with NEMA 56-C motor compatibility. The EP-SYF-3 also includes a shock-absorbing motor coupler for field motor installation.

Agricultural Equipment

Farms with pivot irrigation also run rotary cultivator gearbox assemblies for tillage and round baler gearbox units for straw management across the farming calendar.

Frequently Asked Questions

Customer Reviews & Field Reports