WPEO Double Speed Cast Iron Worm Gearbox — WP Series

Ultra-slow vertical agitation — vessel agitators, crystalliser mixers, and reactor paddle drives rotating at 1–5 RPM — requires simultaneously a vertical upward output shaft and reduction ratios far beyond 1/60. A single-stage WPO delivers maximum 1/60. The WPEO Double Speed Cast Iron Worm Gearbox combines O-type vertical upward output with double-stage worm reduction (1/200–1/900) in a single precision-machined cast iron housing, delivering vertical output shaft speeds as low as 1.67 RPM from a standard motor — no additional gearbox stages required.

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■ O-Type Vertical Upward Output + Double-Stage: Ultra-Slow Vertical Drive

WPEO combines O-type vertical upward output (purpose-built geometry, vertical-rated seals and bearings) and double-stage worm reduction (1/200–1/900). No right-angle head adaptor or additional stage required.

■ Vertical Output Bearings Rated for Axial Hanging Load at Double-Stage Torque

Output shaft bearings rated for full double-stage output torque (up to 6,050 Nm) in vertical upward orientation, with axial load capacity certified for hanging agitator assemblies.

■ O-Type Output Oil Seals — Vertical-Rated Double-Lip

Vertical upward output shaft oil seals are double-lip premium seals rated for hydrostatic head pressure in vertical orientation — identical specification to the single-stage WPO.

■ Dual Oil Chambers — Both Optimised for O-Type + Double-Stage

Two oil chambers configured for the specific submersion requirements of the double-stage housing in O-type output orientation. WPEO-specific fill quantities from the installation guide for this configuration.

■ Multiple Shaft Direction Configurations (A–E) Available

Multiple shaft direction variants are available covering different input shaft angular positions for diverse vessel installation geometries.

■ Full WPE Size Range: 40–250 Combined Centre Distance

Covers output torques from 250 Nm (size 40–70 at 1/200) to 6,050 Nm (size 155–250 at 1/900) for the complete spectrum of ultra-slow vertical drive applications.

☵ Ultra-Slow Vessel Agitators — Vertical Output

Chemical, food, and pharmaceutical vessel agitators requiring 1–5 RPM with vertical output shaft are the primary WPEO application. Double-stage provides the required extreme ratio while O-type delivers the vertical shaft orientation directly.

⚔ Slow Vertical Screw Conveyor Drives

Vertical screw conveyors at very low speeds (2–10 RPM) for precise bulk material feed control use the WPEO for combined vertical output and extreme reduction ratio.

⚒ Crystalliser & Precipitation Tank Drives

Crystallisers rotating at 1–3 RPM with vertical agitator shafts — common in salt, sugar, and API crystallisation — represent a core WPEO application where both vertical output and extreme ratio are simultaneously required.

⚊ Rotary Vessel Top-Entry Vertical Drives

Rotary vessels requiring vertical drive entry with very slow rotation (1–5 RPM) use the WPEO to achieve both the vertical shaft orientation and extreme ratio in a single compact housing.

⚛ Precision Vertical Axis Slow Positioning

Heavy equipment positioning and vertical axis slow rotation systems requiring both vertical output and ratios above 1/60 use the WPEO for the required output geometry at extreme ratios.

✎ ISO 9001:2000 Certified

Every WPEO is manufactured, assembled, and tested under the ISO 9001:2000 quality management framework. We were among the first in our industry category to achieve this certification.

✎ CE Marking

Full CE marking confirms compliance with EU Machinery Directive 2006/42/EC — covering safety, design standards, and manufacturing quality for mechanical power transmission equipment including double-stage worm gearboxes.

✎ Pre-Shipment Testing (Every Unit)

Noise test (below 72 dB(A) at rated load), oil leak test (30-minute pressurisation, both chambers), torque transmission test (output torque within ±5% of rated). Failed units are reworked — not shipped.

✎ Matched-Pair Manufacturing

Both worm wheel sets for each double-stage unit are manufactured in the same production batch, ensuring tooth profile consistency between primary and secondary stages. This matched-pair quality assurance is unique to our double-stage production process.

“WPEO double-stage on our crystalliser agitators at 1.8 RPM. Vertical output at extreme ratio in one unit is exactly what crystalliser design requires. Zero oil leaks from the vertical output shaft seal in 26 months of continuous pharmaceutical operation.”

“WPEO-100/155 on our precipitation reactor agitators. Vertical output and 1/800 ratio combination from one unit replaced a two-gearbox cascade. Noise level is significantly lower than our previous arrangement. Highly recommended.”

“WPEO drives our crystallisation tank agitators at 2 RPM vertical output. Double-stage vertical output combination is unique in the standard catalogue — we searched extensively. Unit performance matches the specification data precisely and has been completely reliable.”

“WPEO on our polymer reactor vertical drives at 3 RPM. Cast iron durability in the aggressive chemical environment is excellent. The double-stage ratio and vertical output is exactly our engineering requirement. Suggestion: more detailed dual oil fill instructions for the O-type orientation.”