WPEDA Double Speed Cast Iron Worm Gearbox — WP Series

OEM builders and plant engineers who need ultra-high reduction ratios AND direct IEC motor connection — without adaptor plates, without couplings — face a specification that standard single-stage catalogues cannot address. The WPEDA Double Speed Cast Iron Worm Gearbox resolves this: the D-type IEC motor flange is integrated into the double-stage housing, delivering 1/200–1/900 reduction with direct motor bolt-on in one D-split cast iron body. For slow process equipment where a clean motorised ultra-high-ratio drive is required without bespoke fabrication, the WPEDA is the definitive catalogue solution.

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■ IEC Motor Flange + Double-Stage: Complete Motorised High-Ratio Drive

The WPEDA D-type IEC motor flange is integrated into the primary stage housing, providing direct motor coupling while achieving 1/200–1/900 reduction in a single cast iron unit. No adaptor plate. No coupling.

■ D-Split Housing — Access Both Stages In Situ

The D-type split housing allows in-situ access to both worm stages. Primary and secondary wheel inspection without full system teardown — an unusually valuable maintenance advantage for double-stage units.

■ IEC Motor Frame Compatibility: Full Range M8–M16

Accepts IEC frames from M8 (size 40–70, 0.12 kW) to M16 bolts (size 155–250, 5.5+ kW) — covering all standard motor sizes for slow industrial process drives.

■ Matched-Pair Worm Stages — Consistent Inter-Stage Performance

Both worm wheel sets manufactured and matched in production, preventing the torque ripple and noise variation common when two separate single-stage gearboxes are cascaded with independently sourced components.

■ 9-Ratio Selection: 1/200 to 1/900

Nine standard ratios provide precise output speed selection from 7.5 RPM (1/200) down to 1.67 RPM (1/900) from a 1,500 RPM motor — covering the full ultra-slow drive spectrum.

■ Anti-Corrosion Coating — Process Environment Grade

Epoxy primer + polyurethane topcoat resists the process chemicals, cleaning fluids, and moisture typical of the environments where WPEDA finds most of its applications.

⚒ OEM Slow Process Machine Drives

OEM machines requiring very slow belt or drum speeds use the WPEDA to bolt the motor direct and eliminate the adaptor/coupling from the machine BOM — reducing assembly cost and alignment error simultaneously.

⚔ Plastics & Rubber Processing

Rubber mixing mills, extruder feed drives, and plastic calenders require high torque at very low speed. WPEDA’s IEC direct mount and double-stage reduction covers this demanding combination in one unit.

☵ Large Vessel Motorised Agitators

Large vessel agitators (5,000L+) where the motor mounts directly to the gearbox via IEC flange at 1–10 RPM output use the WPEDA for the cleanest motorised high-ratio agitator drive architecture.

⚊ Paper Mill Pulper Drives

Pulper chest drives require very low speeds (2–8 RPM) with consistency. WPEDA IEC direct mount eliminates the coupling misalignment that causes seal failures in wet paper mill environments.

⚛ Wastewater Slow Paddle Mixers

Wastewater clarifier drives, sludge paddle mixers, and aeration equipment use the WPEDA for high reduction ratio with direct motor mounting — minimising sealing surfaces in corrosive environments.

✎ ISO 9001:2000 Certified

Every WPEDA 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.

“WPEDA drives our clarifier paddles at 2 RPM. IEC motor bolts directly — no coupling in the wet wastewater environment. Split housing means annual inspection is fast. Outstanding build quality for a harsh environment.”

“Replaced a two-gearbox cascade with WPEDA on our pulper drives. Single housing, IEC motor direct mount, same output speed. Maintenance time reduced from 6 hours to 1.5 hours per scheduled service.”

“WPEDA on our mixer drives at 4 RPM in 45°C ambient. Cast iron housing handles the temperature far better than aluminium. Direct IEC coupling is perfect for our Class F motor spec. Zero failures in 18 months of 24/7 operation.”

“WPEDA-100/155 on our rubber compounding mill drives. Double-stage in one housing is perfect for high torque/low speed. IEC direct mount simplified our machine design. Consistent quality across multiple order batches.”