The WPWEK integrates the H7 hollow output bore of the WPEKA series with the flanged anchor base of the WPWE series. The second-stage worm wheel shaft is through-bored to H7 and fitted with a keyway for direct driven shaft engagement. The wider housing extends laterally to accommodate the flanged base arms, which are precision-machined flat and drilled for anchor bolt positions matching each size group’s Z×L specification.

Hollow Bore + Flanged Base — The Heavy Industrial Combination

Where WPEKA provides coupling-free hollow bore in a foot-mount housing, and WPWE provides flanged base rigidity for solid-shaft drives, the WPWEK delivers both simultaneously. For mining and metallurgical applications with long-shaft direct mounting AND high reaction torques that demand flanged base anchoring, the WPWEK is the engineered solution. Keywords: hollow shaft flange-base double speed worm gearbox, rigid anchor coupling-free two-stage reducer.

Superior Mounting Stability vs WPEKA

At 1/600–1/900 combined ratios, the hollow shaft drive generates substantial reaction torques in the housing — higher than at lower ratios, because output torque is highest at the highest ratios. The WPWEK flanged base distributes these reaction forces over a far larger footprint than the WPEKA foot-mount pads, preventing bolt loosening in continuous heavy industrial service.

Two-Stage Hollow Bore for Long-Shaft Drives

Mining hoist drums, heavy metallurgical roller tables, and blast furnace charging screws often have long shafts that benefit from hollow bore direct mounting — placing the gearbox as close as possible to the shaft bearing, reducing overhung bending loads. The WPWEK delivers this compact hollow-bore arrangement at ultra-high reduction ratios.

Eliminates Coupling in High-Reaction-Torque Applications

In mining and metallurgical environments, coupling maintenance under high reaction torque is a common and costly maintenance event. The WPWEK hollow bore eliminates the output coupling entirely — removing a wearing, alignment-sensitive component from some of the most demanding drive applications in heavy industry.

Full 9-Size Range — 30 to 110 mm Bore

Nine size groups cover bore diameters from 30 mm (size 40-70, smaller mining auxiliary drives) to 110 mm (size 155-250, very large mining hoist and metallurgical equipment shafts) — providing a single standardised product family for the full range of heavy industrial hollow shaft two-stage applications.

Self-Locking for Safe Load Holding

At combined ratios ≥1/400, the WPWEK provides static self-locking that prevents gravity-driven reversal of connected loads. Combined with the flanged base rigidity, this makes the WPWEK a secure, stable drive that holds position safely when de-energised — important for mining hoists and vertical metallurgical equipment.

Mining Hoist & Hoisting EquipmentUnderground mine hoist auxiliary slow drives, shaft hoisting system control drives, and mine winder primary auxiliaries where hollow shaft direct mounting onto the drum shaft AND flanged base anchor rigidity are both required.

Heavy MetallurgyBlast furnace charging screw drives, rolling mill table roller hollow-shaft drives, and heavy slab pusher drives requiring direct hollow-shaft engagement with flanged base anchor mounting to the mill structural steelwork.

Large Conveyor & Transfer EquipmentLarge mining conveyor head drum direct hollow-shaft drives, heavy-duty bulk transfer conveyor drives, and open-cast mine overburden conveyor drives requiring both coupling-free mounting and flanged base structural anchoring.

Harbour & Port EquipmentHarbour crane slewing mechanism hollow-shaft drives, ship loader travel drives, and heavy port conveyor drives where hollow shaft coupling-free mounting combined with flanged base anchor are needed for compactness and rigidity.

Steel & Aluminium ProductionSteel rolling mill roller table auxiliary drives, aluminium smelter anode setting crane drives, and heavy casting line transport roller drives requiring direct hollow-shaft engagement at ultra-high ratios.

Large Infrastructure ProjectsLarge dam gate operating mechanism drives, heavy lock gate worm gear drives, and major infrastructure sluice control systems where the hollow shaft plus flanged base combination provides the most compact and rigid direct-drive arrangement.

ISO 9001:2015 & CE

Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. Mining sector material certs and third-party SGS/BV inspection available. Bore H7 plug gauged and base flatness CMM scanned (≤0.05 mm TIR) on every WPWEK unit before shipment.

Dual Interface + Two-Stage Run Test

Each WPWEK undergoes: (1) H7 bore plug gauge, (2) bore concentricity CMM check (≤0.05 mm TIR), (3) base flatness scan (≤0.05 mm TIR), (4) 45-min two-stage run test verifying noise ≤75 dB(A), seal integrity, and output torque ±5% of rated. Three dimensional checks plus run test.

️ Mining-Grade Material Standards

Housing and flange: FC25 cast iron (≥250 MPa). Both worm shafts: 20CrMnTi (≥58 HRC). Wheel rims: ZCuSn10Pb1 tin-bronze. Full material mill certs available for mining OEM and infrastructure project compliance documentation requirements.

We supply WPWEK hollow shaft flanged-base two-stage gearboxes to mining equipment OEMs, metallurgical machinery builders, and heavy infrastructure equipment manufacturers in Canada, Poland, India, Australia, and over 60 countries. Our three-check inspection standard — bore, concentricity, and base flatness, all CMM-verified — ensures that WPWEK units deliver correct shaft fit AND correct structural anchor at every installation site, without field adjustment.

• ✅ Triple CMM inspection — bore H7, bore concentricity, base flatness, every unit
• ✅ Mining & infrastructure documentation — material certs, SGS/BV on request
• ✅ Large bore capability — up to 110 mm standard; custom bores for large mining shafts
• ✅ Custom anchor bolt patterns for non-standard structural frame configurations
• ✅ 20+ years export record — Canada, Poland, India, Australia and beyond

“We use WPWEK-120/175 at 1/800 ratio on our mine hoist auxiliary slow drives. The hollow bore mounts directly onto our drum shaft and the flanged base anchors to our structural frame — no coupling to service, no bolt loosening in 26 months of continuous operation. The combination of hollow shaft AND flanged base was the specific requirement our application needed. Excellent product.”

David R., Mine Equipment Engineer
Gold Mine, Northern Territory, Australia

“We integrate WPWEK gearboxes into our underground mine conveyor head drum drives. The hollow bore direct shaft mounting combined with the flanged base anchor gives us the most compact, most rigid drive arrangement available for our conveyor head frames. At 1/600 ratio, the drum speed is exactly what our slow conveyor loading application requires. Very satisfied.”

Marek Z., Technical Director
Mining Equipment Manufacturer, Katowice, Poland

“WPWEK-100/155 units on our rolling mill table roller hollow-shaft auxiliary drives. The flanged base anchor is critical for our mill structural steelwork installation, and the hollow bore eliminates the coupling that caused frequent misalignment problems previously. Two years without a coupling-related maintenance call. Excellent product from Ever-power.”

Vikram S., Applications Engineer
Steel Plant Equipment, Bhilai, India

“We use WPWEK for our open-cast mine conveyor head drum drives. The hollow bore plus flanged base combination is exactly the specification our structural engineers required. Good quality, the bore dimensions are consistently H7. One custom bore size required a slightly longer lead time but Ever-power communicated clearly throughout.”

Bruce L., Project Manager
Mining OEM, British Columbia, Canada