WPEKA 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 WPEKA 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.

The WPEKA combines the two-stage extreme ratio capability with the zero-coupling hollow bore output. The driven shaft in… 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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■ K-Type Hollow Bore — Direct Shaft Mount at Ultra-High Ratio

The WPEKA combines the two-stage extreme ratio capability with the zero-coupling hollow bore output. The driven shaft inserts directly into the K-bore — no output coupling required even at 1/900+ ratios with 6,050 Nm output torque.

■ Shaft-Mount Configuration Available — Torque Arm Restraint

The hollow bore enables shaft-mounting the WPEKA directly onto the driven equipment shaft with a torque arm reaction bracket — the same installation method as the WPKA, but with access to ratios up to 1/900+.

■ Same 6,050 Nm Output Torque as WPEA — K-Bore Does Not Reduce Capacity

The K-type hollow bore substitution does not change the worm gear internals or torque ratings. WPEKA size 155–250 delivers identical 6,050 Nm to the WPEA at the same ratio.

■ Two-Stage Precision — Matched Worm Wheel Pairs Both Stages

Both worm wheel stages use precision-matched ZCuSn10Pb1 tin-bronze pairs, providing consistent inter-stage mesh quality. The dual-stage reduction noise level remains within the 68 dB(A) rated load limit.

■ Bilateral A-Type Input — Standard Motor Coupling

A-type solid input shaft accepts motor connections from either side via standard couplings. No motor adaptor required — WPEKA uses the same motor hardware as a standard WPA.

■ Foot-Mount or Shaft-Mount — Two Installation Modes

The WPEKA foot-mount base and torque arm boss are both present in the same housing. Use foot-mount for frame-mounted installation or shaft-mount directly onto the driven shaft — no modification required.

☀ Solar Tracker Shaft-Mount Drives

WPEKA shaft-mount configuration simplifies solar tracker structural design — the dual-stage reducer mounts directly on the tracker rotation shaft without a separate mounting frame, eliminating the frame and coupling between reducer and shaft.

⚙ Slow-Speed Conveyor Head Shaft Drives

For slow-speed conveyors with a keyed head shaft, WPEKA provides ultra-high ratio reduction plus direct shaft mounting — achieving output speeds below 5 rpm from a standard motor without VFD controls or external coupling hardware.

⚒ Large Valve Actuator Shaft Drives

WPEKA K-bore mounts directly on valve stem shafts for large valve actuator applications requiring ratios above 1/200. No coupling at the valve stem eliminates the external hardware most vulnerable to corrosion in outdoor installations.

⚊ Turntable & Indexing Platform Drives

The WPEKA hollow bore accommodates the central pivot shaft of large turntable and indexing platform drives, where extreme ratio reduction from a standard motor and direct shaft connection both simplify the mechanism.

■ 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.

“WPEKA on our solar tracker rotation shafts. Dual-stage reducer mounts directly on the tracker shaft — no separate frame, no coupling. 1/600 ratio from a standard motor. Clean, elegant installation.”

“Used WPEKA on our slow-speed cooling conveyor head shaft drives. Hollow bore on the head shaft, dual-stage for 1/500 ratio — belt speed exactly as required without VFD. Straightforward to install.”

“WPEKA shaft-mount on large valve actuator stems. No coupling at the valve stem level — eliminates the corrosion-prone hardware that was failing in our outdoor installation. Zero failures since changeover.”

“Good ultra-high ratio hollow bore unit. WPEKA-80–135 on our turntable drives. Direct shaft mount, 1/600 ratio, correct torque. Would appreciate a backlash specification for precision positioning assessment.”