WPDZ Single Speed Cast Iron Worm Gearbox — WP Series

Flange-mounted drives with top-entry input are excellent for vessel nozzles and column mounting — but combining them with a direct IEC motor connection eliminates one more potential failure point and speeds up installation. The WPDZ Single Speed Cast Iron Worm Gearbox builds on the WPZ’s Z-type flange housing and T-type input by adding the D-type IEC motor flange for direct overhead motor mounting. This triple combination — flange housing (Z), direct top-entry IEC motor (D), horizontal output shaft — is the most specified configuration for motorised vessel-top agitator drives, column-mounted process drives, and compact panel-mount industrial equipment in Australia and globally.

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■ Z+D Combination: Flange Housing + IEC Motor Direct Mount

The WPDZ achieves direct motorised vessel-top drive in the most compact format available: Z-type flange base + D-type IEC motor overhead + horizontal output shaft = complete motorised drive, no adaptor, no coupling.

■ Compact Size 50–135: Ideal for Small Vessel Agitators

The WPDZ size range (50–135 mm centre distance) targets the large installed base of small-to-medium industrial vessels, reactors, and mixing tanks — covering the 6 Nm to 690 Nm output torque range used by the majority of agitator applications.

■ D-Split Housing for Flange-Mount In-Situ Service

On a vessel-mounted drive, the D-split cover removal allows worm wheel inspection while the gearbox remains bolted to the vessel nozzle and the motor remains mounted. No crane required for routine maintenance access.

■ IEC Motor Frames 56–200 Accepted (Sizes 50–135)

The WPDZ IEC flange accepts motors from M8 (frame 56) to M16 (frame 200) flange bolts across the size 50–135 range — covering 0.18 kW to 4.0 kW motor ratings used in small vessel agitator applications.

■ Oil System Calibrated for Z-Mount + T-Input Geometry

The WPDZ oil channels and fill specification are specifically validated for the Z-mounting + T-input orientation, ensuring proper worm mesh lubrication throughout the compact housing geometry.

■ Anti-Corrosion Paint — Chemical Environment Rated

Standard epoxy primer + polyurethane topcoat provides chemical resistance appropriate for the processing vessel mounting environment typical of WPDZ applications.

⚒ Motorised Vessel Agitator Top-Entry Drives

The WPDZ is the gold-standard for top-entry motorised vessel agitators: Z-flange bolts to the vessel nozzle, D-IEC flange accepts the motor overhead, and the output shaft drives the agitator directly — a complete, clean, 3-bolt installation.

⚔ Chemical Plant Compact Process Drives

Compact process equipment in chemical plants uses the WPDZ for its combination of vessel-flange compatibility, direct motor mount, and split-housing maintainability — all in a small cast iron housing (sizes 50–135 mm).

⚊ Laboratory & Pilot Plant Equipment

Laboratory-scale mixing and processing equipment with standard vessel connections and IEC fractional-horsepower motors use the WPDZ for its standardised, compact direct-mount solution.

☵ Pharmaceutical Vessel Drives

Pharmaceutical manufacturing vessels require gearbox designs that minimise external surface interfaces (contamination risk) and are easy to clean. The WPDZ’s flush flange mount and direct IEC motor connection minimises exposed coupling hardware.

⚛ Compact Column & Tower Equipment

Industrial column internals and tower-mounted compact drives use the WPDZ for the smallest possible motorised drive footprint on structural flanges.

✎ ISO 9001:2000 Certified

We hold ISO 9001:2000 International Quality System Certification — the first in our industry category to achieve this standard. Every WPDZ 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.

“WPDZ is our standard top-entry vessel agitator drive specification. The Z-flange mates with our standard nozzle pattern, the motor mounts on the D-flange above, output shaft down — done. We’ve installed over 200 units across our client projects in 10 years. Zero housing failures.”

“Our GMP vessel agitators use WPDZ exclusively. The flange-mount + direct motor connection minimises external surface area — critical for CIP cleaning validation. D-split housing means we can inspect and swap the worm wheel without removing the vessel from service.”

“WPDZ on all our sulphuric acid dilution vessel agitators. Despite the aggressive environment, the cast iron with our epoxy coating has outlasted the stainless steel shafts we use. The direct IEC motor mount eliminated the coupling that previously corroded and required quarterly replacement.”

“WPDZ drives our beverage mixing vessel agitators. The compact flange-mount design fits our small vessel head dimensions perfectly. IEC motor direct mount eliminated our coupling alignment issues — a very practical engineering improvement for our maintenance team.”