WPEDKS 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 WPEDKS 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, S-type overhead IEC motor flange, K hollow bore output, and two worm stages. The most fully … 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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■ Five Features in One Dual-Stage Housing

D-split maintenance access, S-type overhead IEC motor flange, K hollow bore output, and two worm stages. The most fully specified unit in the entire WP series — eliminating motor adaptor, output coupling, inter-stage coupling, and second mounting frame simultaneously.

■ IEC Motor Overhead — No Adaptor, No Lateral Projection

S-type IEC flange accepts the motor from directly above. No adaptor plate, no lateral motor projection — the minimum possible motorised drive height and width at extreme ratios.

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

K-type hollow bore receives the driven shaft at output torques up to 9,066 Nm (size 155–250). No output coupling hardware at any torque level across the 1/200–1/900+ ratio range.

■ D-Split Housing — In-Situ Access, Motor and Shaft Stay Connected

Both worm stage chambers accessible via split cover removal while the overhead IEC motor and the driven shaft remain connected. The lowest planned maintenance effort in the WPE series for installed ultra-high-ratio drives.

■ Replaces Five Components — Single Unit Solution

WPEDKS replaces: dual-stage reducer + IEC adaptor plate + output coupling + inter-stage coupling + second reducer mounting frame. Zero external coupling hardware at either end, one foot-mount base.

■ Matched Dual-Stage Worm Wheels — 20+ Year Ratio Accuracy

Precision-matched worm wheel pairs at both stages maintain inter-stage ratio accuracy across the extended service intervals of solar, infrastructure, and industrial automation installations.

☀ Maximum-Integration Solar Tracker Drives

WPEDKS provides the lowest component-count solar tracker drive solution: overhead IEC motor, shaft-through-bore connection to the tracker rotation shaft, in-situ D-split inspection access — designed for 20+ year field life with minimum maintenance visits.

⚒ Industrial Valve & Gate Actuator Systems

For valve and gate actuator OEMs specifying direct IEC motor, extreme ratio, shaft-mount output, and validated in-situ inspection capability simultaneously — WPEDKS is the reference unit combining all four requirements.

⚙ Positioning Drive Systems — Extreme Ratio + Direct Connections

Automated turntable, large-format rotary axis, and industrial gantry positioning drives requiring ratios above 1/200 with direct connections at both input and output ends — WPEDKS delivers all requirements in one compact foot-mount unit.

⚊ Overhead Shaft-Mount Conveyor Drives

Overhead motor geometry, hollow bore on the conveyor head shaft, dual-stage extreme ratio from a standard motor, and periodic gear mesh inspection in-situ — WPEDKS is the complete solution for space-constrained overhead slow-speed conveyor applications.

■ 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.

“WPEDKS on our solar tracker shaft drives. IEC motor overhead, K-bore on tracker shaft, D-split for annual field inspection — zero external coupling hardware anywhere. The cleanest drive design we have used in 15 years of tracker installations.”

“WPEDKS on industrial valve actuator assemblies. Direct overhead IEC motor, shaft through K-bore, split cover inspection without motor or valve disconnection. Five functions — one unit. Eliminated three BOM lines per installation.”

“Used WPEDKS on our slow-speed conveyor head shaft drives with overhead motor constraint. 1/600 ratio, K-bore on head shaft, motor overhead, D-split for periodic inspection — everything required in one compact unit.”

“Outstanding five-feature integration. WPEDKS-80–135 on our precision turntable drives. All features operational as specified. Would appreciate a formal backlash specification and an available torque arm accessory kit.”