Opis
WPWKT Universal Hollow Shaft Worm Gear Reducer — Coupling-Free Direct Shaft Drive Purpose-Built for Inclined Conveyor & Quarry Equipment
Inclined quarry conveyors, aggregate elevator head drives, and angled mining conveyor systems have two key drive requirements: the output shaft connection must be coupling-free (hollow bore directly onto the conveyor drum shaft) for compact, maintenance-free installation, AND the gearbox housing must be correctly configured for inclined service — with oil ports at the right positions and housing geometry suited to the angled mounting arrangement. The WPWKT universal hollow shaft tilted-base worm gear reducer delivers both in one purpose-built unit.
The WPWKT extends the WPWT inclined housing geometry with an H7 hollow output bore (16–110 mm) replacing the standard solid shaft — providing the compactness of coupling-free drum shaft engagement at inclined conveyor head and elevated transfer drive positions. Available in 12 sizes, ratios 1/5–1/60. O Ever-power | Get an Inclined Drive Quote
Technical Specifications
WPWKT shares the specification drawing with WPWKV. AB, BB = housing width/depth; CC = housing face; LL = housing length (inclined configuration); S = hollow bore (H7); W×Y = bore keyway. Reference speed 1500 r/min. All dimensions in mm.
| Size | Ratio | AB | B | CC | LL | M | N | E | E₁ | E₂ | G | Z | HS | U | T×V | S(bore) | W×Y | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | 87 | 85 | 40 | 63 | 90 | 187 | 70 | 72 | 97 | 12 | 10 | 25 | 12 | 4×2.5 | 16 | 6×18.8 | 5 |
| 50 | 108 | 105 | 50 | 70 | 120 | 226 | 95 | 90 | 110 | 14 | 12 | 30 | 12 | 4×2.5 | 20 | 6×22.8 | 8 | |
| 60 | 120 | 110 | 60 | 80 | 130 | 257 | 105 | 102 | 129 | 15 | 12 | 40 | 15 | 5×3 | 25 | 8×28.3 | 11 | |
| 70 | 140 | 130 | 70 | 95 | 150 | 305 | 115 | 120 | 155 | 20 | 15 | 50 | 18 | 5×3 | 30 | 8×33.3 | 15.5 | |
| 80 | 160 | 150 | 80 | 105 | 170 | 350 | 135 | 140 | 180 | 20 | 15 | 50 | 22 | 7×4 | 35 | 10×38.3 | 24 | |
| 100 | 190 | 160 | 100 | 135 | 190 | 410 | 155 | 165 | 215 | 22 | 15 | 50 | 25 | 7×4 | 40 | 12×43.3 | 38 | |
| 120 | 219 | 175 | 120 | 160 | 230 | 494 | 180 | 195 | 255 | 25 | 18 | 65 | 30 | 7×4 | 45 | 14×48.8 | 56 | |
| 135 | 249 | 210 | 135 | 185 | 250 | 559 | 200 | 230 | 285 | 30 | 18 | 75 | 35 | 10×4.5 | 60 | 18×64.4 | 84 | |
| 155 | 295 | 252 | 155 | 220 | 275 | 605 | 220 | 250 | 305 | 35 | 21 | 85 | 40 | 12×5 | 70 | 20×74.9 | 129 | |
| 175 | 314 | 282 | 175 | 240 | 310 | 675 | 250 | 273 | 348 | 40 | 21 | 85 | 45 | 14×5.5 | 80 | 22×85.4 | 157 | |
| 200 | 342 | 320 | 200 | 280 | 360 | 749 | 290 | 305 | 390 | 40 | 24 | 95 | 50 | 14×5.5 | 85 | 22×90.4 | 224 | |
| 250 | 420 | 400 | 250 | 315 | 460 | 920 | 380 | 375 | 475 | 45 | 28 | 110 | 60 | 18×7 | 110 | 28×116.4 | 374 |
* Shared specification drawing with WPWKV. LL = housing length for tilted configuration (longer than standard). S = hollow bore H7; W×Y = bore keyway. HS/U/T×V = input shaft dimensions. 5 shaft-direction positions (A–E) for inclined drive geometries.
Product Structure — H7 Hollow Bore + Tilted Inclined Housing
The WPWKT integrates the WPWT inclined-service housing geometry (elongated LL body, inclined-position oil ports, five shaft-direction positions) with an H7 hollow bore replacing the standard solid shaft. The worm wheel shaft is through-bored to H7 and fitted with a keyway, allowing the driven drum shaft to slide directly in from the housing face at the required inclined angle.
| Output Bore | H7 hollow bore with keyway; 16 mm (size 40) to 110 mm (size 250) |
| Configuration | Tilted/inclined housing; elongated LL body; 5 shaft positions (A–E) |
| Oil System | Ports positioned for correct lubrication in inclined service position |
| Self-Locking | At ratios ≥1/30 — prevents inclined conveyor rollback on motor stop |
| Housing | FC25 cast iron; elongated body for inclined hollow shaft geometry |
| Axial Retention | Set screw standard; shrink disc option for heavy reversing applications |
✅ Key Features & Benefits
Hollow Bore + Inclined Housing — Coupling-Free at Any Angle
The WPWKT is the only product in the WPW series that combines H7 hollow bore output with an inclined-service housing configuration. WPWT has inclined housing but solid shaft; WPWK has hollow bore but horizontal-optimised housing. WPWKT delivers both — coupling-free drum shaft engagement in an inclined-service housing. Keywords: hollow shaft inclined mount worm reducer, coupling-free tilted conveyor worm gearbox.
Anti-Rollback Self-Locking on Inclined Conveyors
At ratios ≥1/30, the WPWKT self-locks — preventing inclined conveyor belt and load rollback when the motor is de-energised. The hollow bore ensures the drum shaft is rigidly engaged when the self-locking holds the load. This combination is more reliable than a solid shaft with external backstop in many quarry and aggregate inclined conveyor applications.
Oil Correctly Positioned for Inclined Service
The WPWKT oil ports are configured for the inclined operating position, ensuring correct gear mesh lubrication even when the housing is tilted. This prevents the high-end gear under-lubrication and low-end oil churning that occur when standard horizontal units are used in inclined service.
Compact Inclined Hollow Shaft Drive — No Separate Backstop or Coupling
The WPWKT eliminates both the output coupling (hollow bore) and the separate mechanical backstop (self-locking worm) from the inclined conveyor head drive arrangement. One product replaces two mechanical components, reducing the total drive assembly height at the conveyor head — important in space-constrained quarry and mining conveyor structures.
Precision Gear Pair for Smooth Inclined Operation
Ground worm and bronze wheel to ISO 1328 Grade 7 provide smooth, quiet output in the inclined position — minimising belt vibration and ensuring consistent conveyor speed even at steep incline angles where belt tension variations can amplify gear-induced velocity variations.
12 Sizes — Complete Inclined Hollow Drive Range
Twelve sizes covering hollow bore 16–110 mm and output torques up to 2,371 Nm provide the complete range of inclined hollow shaft conveyor, aggregate, and mining drive requirements within the WPWKT product.
Industry Applications
The WPWKT is the purpose-built solution for inclined conveyor and quarry equipment requiring hollow shaft coupling-free drum engagement in a correctly configured inclined housing:
Inclined Quarry & Aggregate ConveyorsInclined stone crusher feed conveyor head hollow shaft drum drives, aggregate elevating belt conveyor head drives, and quarry inclined conveyor systems where hollow bore coupling-free drum engagement and inclined housing oil system are both required.
Inclined Industrial ConveyorsInclined factory production line conveyor hollow shaft drum drives, tiered assembly line inclined transport system drives, and industrial parts-feeding inclined conveyor head drives requiring compact coupling-free inclined mounting.
Agricultural Elevator Hollow Shaft DrivesGrain elevator leg hollow shaft drum drives, crop conveyance inclined elevator head drives, and agricultural material handling inclined systems where hollow shaft coupling-free direct engagement is preferred for compact installation.
Building Materials Inclined LinesInclined brick and block conveyor hollow shaft head drives, building materials transport system inclined conveyor drives, and construction materials elevating conveyor head drives requiring hollow shaft direct engagement.
Mining Inclined Hollow Shaft DrivesUnderground and surface mine inclined ore transfer conveyor hollow shaft drum drives and mine shaft inclined transport system drives where hollow bore direct drum engagement at inclined angles eliminates coupling hardware.
Waste & Recycling Inclined EquipmentWaste sorting inclined conveyor hollow shaft drives, recycling material elevating system drives, and composting facility inclined conveyor head drives requiring compact hollow shaft inclined-mount solutions.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity. Bore H7 plug gauged and concentricity CMM checked. Inclined position oil fill verified before shipment. SGS/BV inspection available for mining and aggregate sector documentation.
Bore + Inclined Position Test
Each WPWKT undergoes: (1) bore H7 plug gauge measurement; (2) bore concentricity CMM check (≤0.05 mm TIR); (3) 45-min run test with inclined-position oil fill confirmed; (4) noise ≤72 dB(A), seal integrity, torque ±5% of rated verified. Both bore precision and inclined-service performance confirmed per unit.
Material Standards
Housing: FC25 cast iron (≥250 MPa). Worm: 20CrMnTi (≥58 HRC). Wheel: ZCuSn10Pb1 tin-bronze. Third-party inspection on request for quarry, mining, and aggregate industry procurement compliance.
Why Choose Ever-power for WPWKT Gearboxes
We supply WPWKT hollow shaft tilted-base universal worm gearboxes to quarry equipment builders, aggregate processing machinery OEMs, and mining equipment manufacturers in Poland, India, Canada, Australia, and over 60 countries. Our bore verification combined with inclined-position oil fill confirmation — both checked on every unit — ensures WPWKT customers receive products that fit the drum shaft correctly AND are configured for correct lubrication at their actual installation angle.
- ✅ Bore H7 + concentricity + inclined oil fill — all verified every unit
- ✅ Inclined position oil fill instruction — supplied with every WPWKT
- ✅ Quarry & aggregate sector expertise — we understand inclined hollow drive requirements
- ✅ Custom bore sizes for non-standard quarry drum shaft diameters
- ✅ 20+ years export record — Poland, India, Canada, Australia and beyond
⭐ Customer Reviews
“We use WPWKT on our inclined aggregate conveyor head drum drives. The hollow bore slides directly onto the drum shaft — no coupling assembly — and the inclined housing has the oil ports in the right positions for our 28° conveyor angle. The self-locking prevents rollback on motor stop without needing a separate backstop. The combination of hollow bore and inclined housing is exactly what inclined conveyor head drives need.”
Steven C., Drive Systems Engineer
Quarry Equipment Manufacturer, New South Wales, Australia
“WPWKT on our stone crusher inclined belt conveyor head drum drives. The hollow bore direct engagement on the drum shaft and the inclined housing oil system for our 25° conveyor angle both work correctly. We eliminated both the output coupling and the separate backstop from our previous drive arrangement. Significant maintenance simplification. Good quality from Ever-power.”
Adam K., Mechanical Engineer
Aggregate Processing Plant, Wroclaw, Poland
“We use WPWKT for our aggregate elevating conveyor head hollow shaft drives. The inclined housing works correctly for our conveyor angle, the hollow bore fits our drum shafts cleanly, and the self-locking prevents material slide-back on motor stop — important for our safety procedures. Two years of reliable operation. Satisfied with quality.”
Arun T., Plant Engineer
Aggregate Processing, Tamil Nadu, India
“WPWKT on our inclined mine conveyor head drum hollow shaft drives. The inclined housing and hollow bore combination is the right specification for our application. H7 bore dimensions are consistently correct. One delivery was slightly later than expected but Ever-power communicated well. Would recommend for inclined hollow shaft conveyor drives.”
Daniel P., Equipment Manager
Mining Conveyor OEM, Alberta, Canada
❓ Frequently Asked Questions
What is the difference between WPWKT and WPWK?
The WPWK has an H7 hollow bore in a standard housing geometry (similar to WPW platform). The WPWKT has the same hollow bore but in an inclined-service housing with elongated LL body, oil ports configured for inclined position, and five shaft-direction positions (A–E) for inclined machine geometries. Choose WPWK for standard horizontal service; choose WPWKT when the installation is inclined and correct lubrication in the angled position is required.
What is the difference between WPWKT and WPWT?
The WPWT has a solid output shaft in an inclined-service housing. The WPWKT has the same inclined-service housing but with an H7 hollow bore replacing the solid shaft — allowing coupling-free direct engagement of the driven shaft. If your inclined drive already uses a coupling to the driven shaft and you want coupling-free installation, WPWKT is the solution.
How do I retain the drum shaft axially in the WPWKT hollow bore?
Standard supply includes a set screw through the bore keyway for axial retention. For heavy inclined conveyor applications with significant axial forces (from inclined belt tension), the optional shrink disc configuration provides stronger axial retention through interference clamping of the entire shaft circumference — contact us for availability.
Does the WPWKT self-locking prevent rollback on steep inclines?
At ratios ≥1/30, the WPWKT self-locks statically — preventing rollback of connected inclined conveyor loads when the motor is de-energised. For standard quarry and aggregate conveyor inclinations (15–35°), this self-locking is typically reliable. Note that synthetic lubricants reduce friction coefficient and may reduce self-locking reliability — use mineral ISO VG 320 oil when static load-holding is a critical safety requirement.
Can I use a standard WPWK instead of WPWKT on an inclined conveyor?
A standard WPWK can be mounted at inclined angles, but the oil system is not specifically configured for the inclined position — potentially resulting in inadequate lubrication of the high-side gear end. The WPWKT’s oil port arrangement is specifically designed for inclined service. For continuous inclined hollow shaft drives, WPWKT is the engineered recommendation.
Coupling-Free Inclined Conveyor Drive — Get WPWKT Quote
Purpose-built for inclined hollow shaft drum drives — no coupling, correct oil system for inclined service, and self-locking anti-rollback. Our engineers will verify bore size, inclined angle, and oil fill configuration for your conveyor application.
