WPDO Single Speed Cast Iron Worm Gearbox — WP Series

Processing vessels, large mixers, and vertical conveyor drives that require both a vertical upward output shaft and a direct IEC motor flange connection face a specific engineering challenge: achieving both features without custom fabrication or multi-component adaptor chains. The WPDO Single Speed Cast Iron Worm Gearbox resolves this precisely — the D-type split housing integrates an IEC motor flange while the O-type output delivers the vertical upward shaft. The result is a complete motorised vertical drive in a single, maintainable cast iron unit, covering output torques from 20 Nm (size 40 at 1/5) to 3,025 Nm (size 250 at 1/60).

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■ D+O Combination: IEC Flange Input + Vertical Upward Output

The WPDO achieves what two separate products achieve separately: D-type IEC motor flange for direct motor mounting and O-type vertical upward output shaft for vertical drive applications — in one compact cast iron housing.

■ Split Housing for Vertical Drive In-Situ Maintenance

The D-split housing separation allows top-cover removal without disconnecting the motor or the agitator shaft. For vertically-mounted agitator drives, this in-situ access is enormously valuable — no crane lift required for routine maintenance.

■ O-Type Output Shaft: Axial Load Certified

The WPDO vertical output shaft bearings and seals are identically specified to the WPO, carrying the same axial load certification and vertical-rated lip seal design.

■ Input Power Range: 0.12–15 kW

The WPDO motor flange system covers the complete power range from size 40 (M8 flange bolts, 0.12 kW) to size 250 (M16 bolts, 15 kW), accommodating the full spectrum of commercial agitator motor sizes.

■ Anti-Corrosion Coating System for Wet Environments

Standard epoxy primer/polyurethane topcoat provides resistance to the process chemicals, cleaning agents, and moisture typical of food, pharmaceutical, and chemical processing environments.

■ Bilateral Input Shaft on IEC Flange

The D-type IEC flange is centrally located; the input bore is accessible from both sides, allowing motor positioning on either the left or right of the overhead assembly.

☵ Motorised Agitator Assemblies

The WPDO is the standard specification for complete motorised agitator assemblies in chemical, food, and pharmaceutical manufacturing — IEC motor direct-mounts to the D-flange, agitator shaft to the O-output, no external components.

⚒ Cement & Mining Vertical Screw Drives

Heavy-duty vertical screw conveyors in cement and mining operations require motorised vertical drives that can be serviced in position. The WPDO D-split housing provides the required field-service access without dismantling the entire drive assembly.

⚔ Wastewater Treatment Drives

Wastewater treatment paddle mixers and clarifier drives require corrosion-resistant motorised vertical drives. The WPDO cast iron housing and sealed IEC motor flange resist the aggressive wastewater environment far better than aluminium alternatives.

⚊ Bulk Solids Vertical Mixing

Cement blenders, lime mixers, and mineral conditioning tanks all use motorised vertical agitator drives. The WPDO’s direct IEC motor mount eliminates the coupling component most susceptible to corrosion and misalignment in dusty mineral processing environments.

⚛ Paper Mill Chest Agitators

Paper mill stock chests and pulping vessels use vertical agitator drives continuously. The WPDO’s split housing allows worm wheel inspection during planned shutdowns without full agitator strip-down — critical for minimising planned maintenance windows.

✎ ISO 9001:2000 Certified

We hold ISO 9001:2000 International Quality System Certification — the first in our industry category to achieve this standard. Every WPDO is manufactured, assembled, and tested under this quality framework.

✎ CE Marking

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

✎ Pre-Shipment Testing

Every unit undergoes: Noise test (below 68 dB(A) at rated load), Oil leak test (30-minute pressurisation), and Torque transmission test (output torque within ±5% of rated). Failed units are reworked — not shipped.

✎ FC20+ Material Certification

Housing castings are verified by material test certificates for FC20 grade (220 MPa minimum tensile strength). Hardness testing (160–200 HB) and ultrasonic testing for internal defects are performed on size 135 and above.

“WPDO units are our standard specification for all mixing vessel drives. The IEC flange and vertical output in one unit eliminates two components from every vessel assembly. In 8 years of projects across food, dairy, and chemical plants, these units have been completely reliable.”

“Our clarifier paddle drives use WPDO gearboxes in a highly corrosive seawater environment. The cast iron housing with proper coating has outlasted aluminium alternatives by 3:1 in service life. The split housing means we can inspect the worm wheel during annual shutdown without crane hire.”

“WPDO on our sugar crystallisation mixer drives. The IEC direct mount eliminated the coupling misalignment problems we had with the previous external coupling design. After three years and multiple product cycles, zero gearbox failures in our entire mixer fleet.”

“We standardised on WPDO for our mineral conditioning tank agitators. Split housing has been invaluable for the quarterly inspections our plant maintenance schedule requires. Excellent cast iron durability in an aggressive mineral slurry environment.”