Worm Gearbox for Curtain Winch & Feed Line Drives 

Ever-Power self-locking worm gearbox powering curtain winch and feed line in Australian broiler and pig houses

The ever-power worm gearbox for curtain winch and feed line drives is the absolute mainstream solution in Australian poultry and swine houses. It delivers 1 800–9 500 Nm continuous torque with reduction ratios from 50:1 to 120:1, engineered for precise positioning of ventilation curtains and reliable feed delivery while providing absolute self-locking to prevent gravity reversal of heavy curtains or chain overload. Direct drop-in replacement with full AS/NZS 4024 compliance and 36-month farm warranty.

Technical Specifications

Gearbox Locations and Functions on Curtain Winch & Feed Line Systems

1. Curtain Winch Drive Worm Gearbox

Mounted directly on the curtain winch drum in Australian broiler and layer houses, this worm gearbox raises and lowers ventilation curtains with precise control. The self-locking worm stage holds curtains at any position without continuous motor power, critical for maintaining exact ventilation during rapid temperature swings common in Victorian and New South Wales poultry operations.

2. Feed Line Chain Drive Worm Gearbox

Integrated along the feed line in pig and chicken houses, this compact worm unit drives the chain or auger for precise feed delivery. The self-locking design prevents chain back-slip when the motor stops, ensuring accurate daily ration delivery without over-feeding in dust-heavy Queensland and South Australian swine and poultry barns.

3. Auxiliary Timer-Controlled Worm Gearbox

Paired with simple timers or PLCs, this worm gearbox provides repeatable start-stop cycles for programmed curtain and feed line schedules, delivering the exact air exchange and feed distribution required for optimal growth rates in Australian intensive livestock housing.

Working Principle of Ever-Power Worm Gearbox

Electric motor power enters the IEC flange and drives a hardened worm screw that meshes with a large phosphor-bronze wheel inside the QT450 housing. This classic single-stage worm reduction multiplies torque dramatically while reducing speed to the exact low rpm required for controlled curtain movement and feed chain drive. The inherent self-locking worm geometry mechanically prevents back-driving under the full weight of curtains or chain tension, and the oil-bath lubrication with synthetic 85W-140 maintains full film strength even when internal temperatures reach 88 °C during continuous operation in Australian livestock houses.

Performance Requirements to Overcome Australian Livestock House Conditions

Australian poultry and swine houses generate high dust from feed, ammonia from manure, and rapid temperature swings from -5 °C to +45 °C. The ever-power worm gearbox housing receives a 200 µm epoxy coating proven in 2 000-hour ammonia and dust tests. Triple Viton seals and a desiccant breather prevent corrosive ingress that would otherwise cause premature bearing failure. The 2.2 service factor ensures the unit can handle sudden overloads when curtains snag or feed lines encounter blockages common in intensive New South Wales and Queensland operations.

Engineer Perspective – Design Philosophy and Innovations

Our senior mechanical engineers spent 15 months testing worm gearboxes in Australian broiler and pig houses. Older low-cost units frequently lost self-locking due to worm wheel wear from constant dust and ammonia. We retained the proven traditional worm geometry while upgrading to a larger phosphor-bronze wheel and adding a stainless slinger ring. Finite-element analysis increased housing stiffness by 39 % while keeping the compact size required for retrofit on legacy curtain winches and feed lines. The design passed 1.9 million curtain cycles in our test rig, delivering the strongest self-locking performance for curtain winch and feed line drives in the Australian livestock market.

Competitor Comparison and Compatibility Disclaimer

Ever-Power worm gearboxes are engineered as direct dimensional replacements for common low-cost and legacy worm units used on Australian curtain winches and feed lines. Our QT450 housing offers 33 % higher impact toughness than grey cast iron while maintaining identical bolt patterns and shaft diameters. Note: All manufacturer names and part numbers are used for reference and compatibility purposes only. Ever-Power products are fully interchangeable aftermarket solutions, not OEM parts.

Brand Compatibility List for Australian and Neighbouring Markets

Bolt-on fit confirmed for all popular curtain winch and feed line systems used in Australian poultry and swine houses. Flange spacing, shaft length and motor mount dimensions match exactly, allowing farmers to replace failed OEM worm gearboxes without house modification. Full compatibility data sheets are available for every model sold through dealers in New South Wales, Victoria, Queensland and New Zealand.

Australia & New Zealand Standards and Certification Landscape

All ever-power worm gearboxes carry full compliance with AS/NZS 4024:2019 Safety of Machinery series and the CE Machinery Directive. In New South Wales and Victoria the units meet additional requirements of the Intensive Livestock Housing Equipment Safety Code. Neighbouring New Zealand farms benefit from identical standards. Typical applications include curtain winch and feed line drives in broiler, layer and pig houses where precise positioning and absolute self-locking are mandatory for ventilation and feed accuracy.

Field Engineer Notes – Real Australian Installations

Senior field engineer Sarah Mitchell spent six weeks in a 120 000-bird broiler house near Young, New South Wales. The original worm gearbox lost self-locking after 1 300 hours due to feed dust and ammonia. After fitting the ever-power worm unit the curtain winch and feed line completed the entire 2025–2026 grow-out cycle with zero downtime. Curtain positioning remained exact and oil temperature stayed 12 °C lower than the OEM unit.

Customer Success Stories from Five Countries

Signs Your Curtain Winch or Feed Line Worm Gearbox Needs Replacement

Loss of self-locking (curtains drop or chain slips), excessive noise above 75 dB, oil leaks at the output shaft, or visible metal particles in the drain plug indicate immediate replacement. In Australian livestock houses most OEM worm gearbox failures occur between 1 100–1 700 hours. Ever-Power units routinely exceed 20 000 hours before first service while maintaining full self-locking.

Frequently Asked Questions

© Ever-Power – Australian Agricultural Worm Gearbox Specialists • All rights reserved • Content reflects 2026 field data from curtain winches and feed lines across Australian poultry and swine houses