WPEX Double Speed Cast Iron Worm Gearbox — WP Series

Sub-floor, inverted, and gravity-assisted drive systems requiring output shaft speeds below 10 RPM push beyond the 1/60 limit of single-stage worm gearboxes. Previously, achieving extreme reduction with a downward output shaft required two separate gearboxes with an intermediate coupling. The WPEX Double Speed Cast Iron Worm Gearbox combines X-type vertical downward output with double-stage worm reduction (1/200–1/900) in one cast iron housing. No adaptor stages. No additional gearboxes. Output speeds as low as 1.67 RPM with the output shaft pointing directly down — for the complete range of below-floor, inverted, and gravity-feed industrial drive applications.

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■ X-Type Downward Output + Double-Stage: Sub-Floor Extreme-Ratio Drive

WPEX delivers both specialisations: vertical downward output (purpose-built X-type geometry, downward-pressure-rated seals) and double-stage worm reduction (1/200–1/900). Previously requiring a two-gearbox cascade, now in one housing.

■ Downward-Pressure Oil Seal — Double-Lip Premium

The X-type vertical downward output shaft seal resists the static oil pressure from the oil bath above resting on the seal face. WPEX uses premium double-lip seals with enhanced spring preload maintaining containment under continuous downward oil pressure.

■ Dual Oil Chambers — Both Calibrated for X-Type Orientation

WPEX dual oil chambers are filled to the correct levels for vertical downward output orientation — which differs from horizontal and upward orientations. Both chambers’ fill levels specified in the WPEX installation guide X-type section.

■ Full Double-Stage Output Torques in Downward Configuration

The downward output orientation does not reduce WPEX output torque rating. Maximum torques match the WPEA (same size combination) — up to 6,050 Nm at size 155–250. X-type output shaft and bearings rated for full double-stage torque.

■ FC20+ Housing Rated for Hanging Load Axial Force

Load components hanging from the WPEX output shaft create sustained downward axial force. FC20+ cast iron housing rigidity resists the deflection that would misalign output bearings under sustained hanging loads.

■ Multiple Shaft Direction Variants

Multiple shaft direction configurations (A–E) available for the WPEX, accommodating various input shaft angular positions for different sub-floor and overhead installation geometries.

⚊ Sub-Floor Ultra-Slow Conveyor Drives

Below-floor conveyors requiring very slow screw or drag chain speeds (1–8 RPM) use the WPEX for vertical downward output at extreme ratios — without any above-floor gearbox cascade.

☵ Inverted Slow Agitator Drives

Inverted mixer installations where the agitator hangs below the gearbox, requiring downward output at very low speeds (1–5 RPM), use the WPEX for the combined downward output and double-stage ratio.

⚒ Gravity-Assisted Vertical Material Feeders

Gravity-fed dispensing and bulk solid feeders with downward discharge screws use the WPEX downward output for slow, precise dispensing rates at ratios beyond single-stage capability.

⚔ Overhead Conveyor Track — Ultra-Slow Head Drives

Overhead power-and-free conveyor track drives requiring very low chain speeds with the drive unit above and the chain below use the WPEX for extreme ratio downward output.

⚛ Hanging Cable & Chain Winch Slow Drives

Cable winch and chain hoist systems requiring very slow cable payout speeds (1–3 m/min) with the drive above and load below use the WPEX for downward output at extreme ratios.

✎ ISO 9001:2000 Certified

Every WPEX 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.

“WPEX on our below-floor drag chain drives at 3 RPM. X-type downward output at double-stage ratio in one unit reduced our below-floor drive station footprint by 45%. No intermediate coupling to maintain in the confined sub-floor space. Excellent performance for 22 months continuous.”

“WPEX-80/135 on our overhead conveyor track drives. Downward output onto hanging chain drive at 1/400 ratio. Previously needed two gearboxes. The WPEX in one housing simplified the track installation and reduced drive station weight by 30%.”

“WPEX drives our gravity-feed dispensing screws at 2 RPM. Vertical downward output and extreme ratio gives us precise dispensing control from a standard motor. Zero oil seal leaks in 18 months despite the downward pressure — seal quality is excellent.”

“WPEX on our inverted mixer drives. Double-stage ratio and downward output in one housing replaced a complex two-gearbox cascade. Cast iron durability is excellent. The dual oil fill for X-orientation needs specific documentation for our maintenance team.”