WPEDA Double Speed Cast Iron Worm Reducer — WP Series

Single-stage worm reducers achieve ratios up to 1/60. When applications demand 1/200, 1/500, or 1/900 — solar trackers, valve actuators, slow-speed conveyors, and positioning drives — a second worm stage is the engineering answer. The WPEDA places two matched worm stages in tandem in a single cast iron housing, delivering ratios from 1/200 to over 1/900 in one compact, foot-mount unit with no intermediate shafting, no external coupling between stages, and no additional mounting frame.

Integrates the IEC motor flange directly into the first stage of the dual-chamber housing. Motor bolts on in four bolts … The dual-stage architecture uses matched tin-bronze worm wheels and 20CrMnTi worm shafts at both stages, providing consistent mesh quality and noise performance across the full ultra-high ratio range.

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■ IEC Motor Flange on Dual-Stage Housing — No Adaptor

Integrates the IEC motor flange directly into the first stage of the dual-chamber housing. Motor bolts on in four bolts — no adaptor plate, no coupling, no alignment — across the full 1/200–1/900+ ratio range.

■ D-Type Split Housing — In-Situ Access to Both Stages

The D-type split line enables the housing cover to be removed without disturbing the motor or driven machine. Both worm stage chambers are accessible for inspection and service in-situ — critical for planned maintenance on installed solar or valve actuation systems.

■ Output Torque to 9,066 Nm — Size 155–250 with IEC Input

WPEDA size 155–250 delivers up to 9,066 Nm from a 5.5 kW IEC-flanged motor at the highest available ratio — the largest output torque in the WPE series.

■ Matched Dual-Stage Tin-Bronze Worm Wheels

Both reduction stages use precision-matched ZCuSn10Pb1 tin-bronze worm wheel pairs, calibrated for consistent inter-stage ratio accuracy across the 1/200–1/900+ range.

■ One Unit Replaces Reducer + IEC Adaptor — Fewer BOM Items

WPEDA replaces the gearbox plus the IEC motor adaptor plate. In OEM ultra-high-ratio drive systems, eliminating the adaptor reduces component count, installed length, and assembly time.

■ FC20+ Dual-Chamber Housing — Thermally Stable at 95°C

The single-cast dual-chamber FC20+ housing maintains inter-stage alignment at operating temperature. No bolted joint between stages means thermal expansion does not cause relative shaft displacement.

☀ Motorised Solar Tracker Systems

WPEDA IEC motor flange enables direct motor attachment on solar tracker drive units. 1/600–1/900 ratios achieve panel rotation speeds below 2 rpm from standard 4-pole motors without VFD controls.

⚒ Electric Valve Actuator Drives

Direct IEC motor coupling at ratios to 1/900+ provides the torque multiplication needed for large-diameter industrial valve actuation — eliminating the motor adaptor from the electric actuator BOM.

⚙ Low-Speed Industrial Mixers

Large industrial mixing vessels requiring output shaft speeds below 2 rpm use WPEDA dual-stage reduction with direct IEC motor — compact, direct-drive architecture versus multi-stage reducer trains.

⚊ Automated Gate & Barrier Systems

WPEDA high-ratio reduction from a compact IEC motor drives automated gates, dam sluices, and industrial barrier systems where torque, slow speed, and direct motor connection are all required.

■ ISO 9001:2000 Certified — Dual-Stage Assembly

Every WPE double speed unit undergoes ISO 9001:2000 quality management at both worm stage assembly levels. Inter-stage alignment and combined ratio accuracy are verified before final assembly.

■ CE Marking — EU Machinery Directive 2006/42/EC

Full CE compliance for mechanical power transmission equipment supports export to EU, UK, Australian, and New Zealand markets without re-certification.

■ Pre-Shipment Testing: Noise, Leak, Torque

Noise below 68 dB(A) at rated load, 30-minute pressurisation leak test on both gear chambers, and output torque within ±5% of rated. Non-conforming units reworked before shipment.

■ FC20+ Material Certification — Both Housings

Both the primary and secondary worm housings are verified by FC20 mill certificates: minimum 220 MPa tensile strength, 160–200 HB hardness. Ultrasonic defect testing on size combinations 135–200 and above.

“WPEDA on our solar tracker drives. IEC motor mounts direct — no adaptor. Ratios to 1/900 give us panel tracking speed directly from a 4-pole motor. Compact and clean compared to multi-stage alternatives.”

“Used WPEDA-100–155 on industrial valve actuators. Direct IEC motor at 1/800 ratio provides 2,100 Nm from a compact motor. D-split cover opens for annual gear inspection without removing the motor.”

“WPEDA on our large dam sluice gate drives. IEC motor direct, 1/900 ratio, 3,050 Nm output. Replaced a two-reducer plus chain drive arrangement. Single unit, dramatically simplified installation.”

“Good IEC + dual-stage combination. WPEDA-80–135 on our automated industrial gate drives. Direct motor mount at high ratio is exactly right. Independent oil chambers simplified our maintenance schedule.”