WPEDKA 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 WPEDKA 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.

D-split maintenance access, IEC direct motor mount, K hollow bore output, and two-stage extreme ratio — all within a sin… 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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■ Four Functions in One Dual-Stage Housing

D-split maintenance access, IEC direct motor mount, K hollow bore output, and two-stage extreme ratio — all within a single FC20+ cast iron dual-chamber housing. The most fully specified unit in the WPE double speed series.

■ IEC Motor Flange — Direct Motor Mount at 1/200–1/900+

Motor bolts directly onto the first-stage IEC flange. No adaptor plate, no coupling between motor and first stage. Simplifies OEM motorised drive BOM at all ultra-high ratio levels.

■ K Hollow Bore — No Output Coupling at 9,066 Nm Maximum

The K-type output bore receives the driven shaft directly even at maximum output torques up to 9,066 Nm (size 155–250). No coupling hardware required at the output shaft interface.

■ D-Split Housing — Dual-Stage In-Situ Access

Remove the housing cover without disturbing motor or driven shaft connections. Both worm stage chambers are accessible for worm wheel inspection and replacement in-situ — minimising planned maintenance time for installed motorised drive systems.

■ Replaces Four Components — Reducer + IEC Adaptor + Output Coupling + Second Frame

WPEDKA eliminates the IEC motor adaptor, the output shaft coupling, and the inter-stage coupling and frame required by two separate single-stage reducers. Single unit, minimum installation hardware.

■ Matched Dual-Stage Worm Wheel Pairs — Consistent Ratio Accuracy

Both stage worm wheel pairs are precision-matched at manufacture. Inter-stage ratio accuracy is maintained across the full operating life — critical for positioning drives where accumulated ratio error must remain within specification.

☀ Solar & Renewable Energy Motorised Drives

WPEDKA direct IEC motor flange and hollow bore output simplify solar tracker and wind turbine yaw drive design — no adaptor, no coupling at either end, in-situ service access for the expected 20+ year field life.

⚒ Electric Valve Actuator Systems

IEC motor direct coupling and K-bore valve stem mounting eliminates both motor adaptor and output coupling from electric actuator assemblies. D-split cover provides in-situ valve actuator inspection access.

⚙ Industrial Positioning Drive Systems

For CNC rotary table indexing, large-format precision turntable drives, and automated gate positioning systems, WPEDKA extreme ratio plus direct connections at both ends simplifies the drive train architecture.

⚊ Shaft-Mounted High-Ratio Conveyor Drives

Shaft-mount WPEDKA directly on conveyor head shafts for extreme-ratio, ultra-slow-speed conveyor drives — IEC motor overhead, hollow bore on shaft, no coupling hardware anywhere in the drive train.

■ 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.

“WPEDKA on our solar tracker motorised drives. IEC motor direct, K-bore on tracker shaft, D-split for 20-year field maintenance plan. No coupling hardware anywhere in the drive — exactly what the system design required.”

“Used WPEDKA on our industrial valve actuator assemblies. Eliminated IEC adaptor, output coupling, and second reducer frame from the BOM. Single unit at 1/800 ratio with 2,100 Nm output. Remarkable simplification.”

“WPEDKA on our precision turntable positioning drives. Direct IEC motor, shaft through K-bore, split cover for annual inspection. Most compact drive architecture we’ve achieved for this application.”

“Excellent integration unit. WPEDKA-80–135 on our conveyor positioning drives. All four features working as described. Would appreciate a formal backlash specification for use in our positioning accuracy calculations.”