WPEDKA Double Speed Cast Iron Worm Gearbox — WP Series

When a double-stage ultra-high-ratio drive must simultaneously provide a direct IEC motor connection and a hollow bore output shaft, the result is a three-way engineering specification that no combination of standard single-stage products can satisfy cleanly. The WPEDKA Double Speed Cast Iron Worm Gearbox delivers exactly this: D-type IEC motor flange, K-type hollow bore output, and double-stage worm reduction (1/200–1/900) in a single D-split cast iron housing. Pharmaceutical batch reactors, slow shaft-mounted OEM machinery, and specialty chemical process equipment where all three specifications are non-negotiable find the WPEDKA to be the definitive single-unit solution.

✉ Request a Quote
 | About Ever-power

■ Triple Integration: D-IEC Flange + K Hollow Bore + Double-Stage

The WPEDKA is the double-stage counterpart to the single-stage WPDKA — all three features carried to the WPE platform. Two components (adaptor plate, coupling) eliminated from both motor and output sides simultaneously.

■ D-Split Housing: All Three Features Maintainable In Situ

Despite three combined features, the D-split provides full in-situ maintenance access. Remove housing cover: access both worm stages. Remove motor: inspect primary stage. Disconnect hollow bore shaft: inspect output bearing.

■ 9 Ratios from 1/200 to 1/900 — Full Selection Available

All nine ratio steps available, covering output speeds 7.5 RPM (1/200) down to 1.67 RPM (1/900) from a 1,500 RPM motor. For the hollow bore output, the driven shaft rotates within this range based on ratio selection.

■ IEC Frame Range: M8 to M16 Flange Bolts

Size 40–70 (M8): 56 frame (0.12 kW). Size 155–250 (M16): up to 315 frame (5.5+ kW). The full IEC frame range for slow industrial process drives is covered by the WPEDKA size range.

■ Hollow Bore H7 Tolerance Throughout Double-Stage Size Range

K-type hollow bore maintained at H7 tolerance with standard GB/T 1095 keyway dimensions across all WPEDKA sizes — ensuring driven shaft fit consistency even at extreme output torques.

■ Zero External Couplings — Both Input and Output Sides

Motor connects directly to D-IEC flange (no input coupling). Driven shaft inserts into K hollow bore (no output coupling). The WPEDKA operates with zero external coupling hardware on either side.

⚙ Pharmaceutical Batch Reactor Shaft Drives

Batch reactors requiring (1) IEC motor direct mount, (2) hollow bore onto agitator shaft, (3) ultra-low agitation speed (1–5 RPM) — the WPEDKA satisfies all three in one GMP-compatible cast iron unit.

⚒ Specialty Chemical Slow Mixers

Sigma mixers, kneaders, and planetary ball mills requiring hollow bore shaft connection, IEC direct motor mount, and ratios above 1/60 are exactly addressed by the WPEDKA.

⚊ OEM Motor-Shaft Slow Drives

OEM continuous process plants where the machine design calls for motor-direct (IEC flange) and shaft-mount output (hollow bore) at extreme ratios use the WPEDKA from a single standard catalogue unit.

⚔ Very Slow Motorised Conveyor Head Shaft Drives

Very slow motorised conveyor head shaft drives (hollow bore onto head shaft, motor IEC direct) in drying, cooling, and curing conveyor applications find the WPEDKA’s triple-feature design exactly matched.

☷ Hygienic Food Processing — Slow Motorised Shaft

Food processing vessels requiring hygienic drive design (minimal coupling hardware), IEC motor direct mount, hollow shaft connection, and ratios beyond 1/60 — bread proofer drives, pasta extruder feeds — specify the WPEDKA.

✎ ISO 9001:2000 Certified

Every WPEDKA 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.

“WPEDKA is our standard for all batch reactor agitator drives. Motor direct to D-flange, agitator shaft into K-bore, double-stage ratio for correct RPM. GMP validation was straightforward with standard catalogue product documentation. Exceptional reliability.”

“Our specialty chemical reactor uses WPEDKA-100/155. Hollow bore, IEC direct mount, 1/600 ratio in one unit — exactly what our process engineer specified. D-split housing means we inspect without disturbing the reactor.”

“WPEDKA on our adhesive mixer drives. Triple feature replaced three separate components. Cast iron durability around solvents and adhesive fumes has been excellent. Significant maintenance cost reduction.”

“WPEDKA drives our bread proofer conveyor at 2 RPM. IEC motor mount, hollow shaft output, double reduction — exactly our machine specification. Consistent quality across production orders.”