WPEKS Double Speed Cast Iron Worm Gearbox — WP Series

Overhead motor drives that must also connect to the driven shaft via hollow bore — eliminating the coupling on the most mechanically demanding side — while delivering ratios far beyond single-stage capability, represent a triple-specification challenge. The WPEKS Double Speed Cast Iron Worm Gearbox addresses this precisely: S-type input shaft (overhead motor), K-type hollow bore output (direct shaft connection), and double-stage worm reduction (1/200–1/900) in a single cast iron housing. It is the single-unit solution for the overhead-motor + shaft-mount + extreme-ratio combination.

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■ S + K + Double-Stage: Overhead-Motor Shaft-Mount Extreme-Ratio in One Unit

Three specialised specifications combined in one housing: overhead motor geometry (S-input), coupling-free shaft connection (K hollow bore), ultra-high ratio (double-stage worm). Each feature eliminates one component from a conventional multi-part arrangement.

■ K Bore Oriented for Overhead S+K Geometry

The hollow output bore is positioned and sealed for operation in conjunction with the S-type input overhead orientation. Oil seals are specifically selected for the S+K combined geometry.

■ Full Double-Stage Torque Through Hollow Bore

The WPEKS K-type hollow bore is rated for the full double-stage output torque — identical torque ratings to the WPES solid output shaft for the same size combination. No derating for hollow bore.

■ S-Type Input Oil Circuit — Validated for S+K Geometry

Oil distribution channels validated for the unique combination of S-type input geometry and K-type output geometry in the double-stage housing. Ensures proper lubrication of both stages in the combined S+K configuration.

■ Torque Arm Boss for Shaft-Mount Housing Restraint

When installed as a shaft-mount (hollow bore onto driven shaft), the WPEKS housing torque arm boss provides the housing restraint anchor point. S-type input orientation is compatible with torque arm shaft-mount installation.

■ Available in 9 Sizes — Full Double-Stage Range

WPEKS covers the full WPE double-stage size range (40–250 mm combined), providing output torques from 250 Nm (size 40–70 at 1/200) to 6,050 Nm (size 155–250) through the hollow bore.

☵ Overhead Motor Shaft-Mount Extreme-Ratio Agitators

Agitator drives where the motor must be overhead, the agitator shaft must insert through a hollow bore, and the ratio must exceed 1/60 are the exact application profile of the WPEKS.

⚊ Slow Overhead-Driven Shaft-Mount Conveyors

Conveyor head shaft-mount drives with overhead motor positions and very slow belt speeds combine the WPEKS’s S-input, K hollow bore, and double-stage ratio in the most compact possible configuration.

⚒ Extreme-Ratio Fan Shaft Drives — Overhead Motor

Industrial fans with very slow rotation and overhead motor mounting use the WPEKS hollow bore shaft-mount for direct fan shaft engagement at ultra-low speeds.

⚔ Ceiling-Mount Slow Turntable Drives

Ceiling-mounted turntable and indexing table drives requiring very slow rotation (1–5 RPM) with the motor overhead and the turntable shaft passing through the hollow bore use the WPEKS.

⚛ Any S + K + Double-Stage Requirement

Any process equipment specification combining overhead motor (S), hollow bore output (K), and >1/60 ratio is best served by the WPEKS — the only standard catalogue product addressing all three simultaneously.

✎ ISO 9001:2000 Certified

Every WPEKS 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.

“WPEKS on our slow-rotation ventilation fan drives. Overhead motor, hollow bore onto fan shaft, 1/500 ratio — exactly our specification. Previously needed three separate components. Now one unit per drive position. Maintenance time per service halved.”

“WPEKS was the only standard catalogue product combining overhead input, hollow bore output, and double-stage reduction. We searched extensively before finding it. Engineering quality matches what we expect from a serious gearbox manufacturer.”

“WPEKS drives our ceiling-mount turntable slow rotation. Overhead motor, hollow bore central shaft, double-stage for 3 RPM. Three requirements in one unit. Cast iron build quality is consistent and torque delivery at 1/600 is exactly as specified.”

“WPEKS on our overhead motor slow conveyor shaft drives. S-input and K-output in a double-stage unit is unique in the standard catalogue. Build quality is solid, dimensions accurate. Good product for a specification that was previously very hard to source.”