WPEDO Double Speed Cast Iron Worm Gearbox — WP Series

Motorised ultra-slow vertical agitator drives — IEC motor bolt-on, vertical upward output shaft, and reduction ratio far beyond 1/60 — require a gearbox combining three capabilities that no single-stage product addresses cleanly. The WPEDO Double Speed Cast Iron Worm Gearbox integrates IEC motor flange (D-type), vertical upward output (O-type), and double-stage worm reduction in a single D-split cast iron housing. Motor bolts to IEC flange, output shaft drives the vertical agitator, double-stage ratio achieves the required ultra-low speed — one unit, no adaptors, no coupling, no additional stages.

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■ D-IEC Flange + O-Vertical + Double-Stage: Complete Motorised Slow Vertical Drive

WPEDO achieves the full motorised vertical slow agitator drive specification in one unit. Motor bolt-on IEC flange. Output shaft vertical upward. Extreme ratio. Three requirements, one catalogue number.

■ D-Split Housing — Service Without Agitator Removal

In a vessel-top installed WPEDO, the D-split cover removal allows worm wheel inspection while motor remains on IEC flange and agitator shaft remains connected to output. This in-situ service capability is critical for minimising agitator maintenance downtime.

■ Vertical Output Axial Load Rated for Direct Motor + Hanging Agitator

Vertical output bearings rated for the combined axial load of: agitator hanging weight and axial component of mixing reaction torque. Sizing tables account for the motor weight on the IEC flange and its structural contribution.

■ Output Torques up to 9,066 Nm (Size 155–250 at 1/900)

The WPEDO delivers the same high output torques as WPEA/WPEDA through the vertical O-type output shaft — providing the torque capacity required by large vessel agitators handling viscous process media.

■ IEC Motor Compatibility: Full Frame Range

From 0.12 kW fractional-horsepower (M8 flange, sizes 40–70) to 5.5+ kW industrial (M16 flange, sizes 155–250) — covering the complete motor power range for slow agitator applications.

■ Anti-Corrosion Coating for Vessel-Top Environments

Vessel-top and reactor-top mounting exposes the gearbox to process steam, chemical vapour, and cleaning agent splash. Standard epoxy/polyurethane coating provides the required chemical and humidity resistance.

☵ Motorised Ultra-Slow Vessel Agitators

Large vessel agitators requiring motorised IEC direct mount and vertical output shaft at 1–10 RPM are the definitive WPEDO application — one unit satisfies the complete motorised slow vertical agitator drive specification.

⚒ Wastewater Motorised Slow Paddle Drives

Wastewater paddle mixer and clarifier drives at very low speeds with direct IEC motor mounting and vertical output for top-entry paddle configuration use the WPEDO for their complete motorised slow vertical drive.

⚔ Pharmaceutical Crystallisation — Motorised Vertical

Pharmaceutical and food crystallisation equipment with direct motor mounting and vertical agitator drives uses the WPEDO’s D-IEC flange + O-output + double-stage combination as the standard motorised drive specification.

⚊ High-Viscosity Chemical Mixing Vessels

High-viscosity chemical mixing in polymer, rubber compound, and specialty adhesive vessels requires direct motor mounting and vertical output at very low shaft speeds — the WPEDO’s exact engineering profile.

⚛ Cement & Construction Mixing — Vertical Motor Drive

Cement slurry mixers and grout preparation vessels with direct motor drives and vertical agitator shafts at 2–8 RPM use the WPEDO as their standard motorised slow vertical drive.

✎ ISO 9001:2000 Certified

Every WPEDO 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.

“WPEDO on our pharmaceutical vessel agitators. IEC direct mount, vertical output, double-stage ratio in one unit with D-split housing is the most complete agitator drive package we have used. Quarterly inspections take 45 minutes per vessel versus 4 hours previously.”

“WPEDO is now our standard specification for all motorised slow agitator drives. Complete integration — motor direct, vertical output, extreme ratio, split housing — was previously achievable only with custom-engineered arrangements. The WPEDO makes it a standard catalogue selection.”

“Using WPEDO on 24 reactor vessels in our specialty chemicals plant. D-split housing has been invaluable — we service all 24 agitator drives during our 48-hour annual shutdown without vessel entry. Motor stays mounted, agitators stay in vessel, only the housing cover comes off.”

“WPEDO on our soap manufacturing vessel agitators. Vertical output and IEC direct motor mount simplified our drive installation significantly. The local maintenance team can service the D-split housing without specialist gearbox knowledge. Excellent practical engineering.”