WPEO Double Speed Cast Iron Worm Reducer — WP Series

Where applications demand both vertical upward output shaft direction and ultra-low output speeds — fermentation vessel agitators, sludge mixers, and slow-speed batch processors — a single-stage WPO covers ratios only to 1/60. The WPEO extends this to 1/900+, combining the O-type vertical upward output with two tandem worm stages in a single FC20+ cast iron housing. Output speeds below 2 rpm from a standard 4-pole motor are achievable without VFD controls — simplifying the drive system and eliminating inverter maintenance.

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■ O-Type Vertical Upward + Double Stage — Direct Agitator Connection at Ultra-Low Speed

The WPEO output shaft exits vertically upward and achieves ratios from 1/200 to 1/900+, delivering output speeds well below 10 rpm from a standard motor. Connects directly to slow-speed agitator shafts without a right-angle bracket or VFD speed control.

■ Same 6,050 Nm Output Torque as WPEA — O Output Does Not Reduce Capacity

O-type vertical output direction does not affect the worm gear torque ratings. WPEO size 155–250 delivers the same 6,050 Nm as WPEA at equivalent ratios.

■ Oil Volume Calibrated for O-Type Vertical Orientation

With output shaft vertical upward, the worm wheel submersion depth changes. The WPEO lubrication table specifies the correct oil volume for each size combination in O-type orientation — independent for each stage chamber.

■ Dual Independent Oil Chambers — Both Stages

Each stage chamber has its own fill, gauge, and drain. Monitor and service each independently on the 2,500-hour interval.

■ Bilateral Horizontal Input — Standard Motor Coupling

The horizontal bilateral input shaft accepts standard motor coupling connections from either side regardless of the O-type output orientation.

■ FC20+ Dual-Chamber Cast Iron — Process Environment Suitable

Cast iron housing resists the moisture and process fluid splash common in agitator and mixing vessel environments.

⚔ Ultra-Slow Agitator Drives

WPEO achieves output speeds below 2 rpm for fermentation vessels, sludge digesters, and slow-speed chemical reactors — eliminating the VFD that a single-stage WPO would require to reach comparable speeds.

☵ Vertical Batch Mixer Drives

Bottom-entry vertical mixer shafts connect directly to the WPEO upward output at extreme low speeds for viscous product mixing in food, cosmetics, and pharmaceutical batch processing.

⚒ Vessel Agitator Infrastructure Drives

Water treatment clarifier and aeration basin agitators requiring output speeds below 5 rpm use WPEO double-stage reduction — standard motor, vertical shaft output, no speed controller.

⚊ Slow-Speed Lift Mechanisms

Vertical lift and winch mechanisms requiring ultra-low output speed with high torque from a compact drive unit use WPEO for ratios that no single-stage O-type reducer can provide.

■ ISO 9001:2000 — Dual-Stage Assembly Certified

Both worm stage assemblies are manufactured and tested under ISO 9001:2000. Inter-stage alignment and ratio accuracy are verified before final assembly of every unit.

■ CE Marking — EU Machinery Directive 2006/42/EC

Full CE compliance for export to EU, UK, Australian, and New Zealand markets without re-certification.

■ Pre-Shipment Testing: Noise, Leak, Torque

Noise below 68 dB(A) at rated load, 30-minute pressurisation of both gear chambers, and output torque within ±5% of rated. Non-conforming units reworked before shipment.

■ FC20+ Material Certification

Both housings carry FC20 mill certificates: 220 MPa minimum tensile strength, 160–200 HB hardness. Ultrasonic testing on size combinations 135–200 and above.

“WPEO on our fermentation vessel agitators. 1/800 ratio gives us the slow paddle speed we need from a standard motor — no VFD, no speed controller. Vertical upward output connects directly to the paddle shaft.”

“Used WPEO-80–135 on our sludge digester drives. Output speed of 2.4 rpm at 1/600 ratio — exactly what we specified. Vertical output shaft connects directly to the agitator without a right-angle gear head.”

“WPEO on our batch mixer drives. Double-stage reduction to 1/500 from a standard 4-pole motor. Vertical shaft output. Eliminated the VFD we previously used for speed reduction — significant cost saving.”

“Good double-stage O-type unit. WPEO-70–120 on our process vessel agitators. Ultra-low speed directly from motor, vertical output. Would appreciate a combined O+K variant for shaft-bore agitator connections.”