WPDKS

WPDKS Series Worm Gear Reducer | IEC Motor Flange

WPDKS is the most feature-rich configuration in the WP hollow bore family: IEC B5 flange input (no input coupling) + WPS-grade deep bore output (no output coupling) + tapered roller output bearings starting from size 80, which can withstand heavy impacts and chain-driven radial loads while eliminating the need for couplings at both ends.WPDKS Series Worm Gear Reducer | IEC Motor Flange + Heavy-Duty Deep Hollow Bore

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Description

The WPDKS Series worm gear reducer sits at the apex of the WP hollow-bore family — the only configuration that simultaneously combines an IEC B5 motor-mounting flange input (no input coupling), a WPS-class deep hollow bore output (no output coupling, maximum engagement depth), and tapered roller output bearings from size 80 upward. Where the WPDKA provides the same coupling-free interfaces but with the lighter WPA-class bore depth, the WPDKS steps up to the WPS-class bore engagement — between 150% and 250% deeper than the WPDKA at the same frame size — and replaces the deep-groove ball output bearings with tapered rollers that carry combined radial and axial shaft loads without distortion. For Australian engineers in Sydney, Melbourne, Brisbane, Perth, and Adelaide specifying a motorised hollow-bore worm reducer in heavy chain conveyor, mining feeder, agricultural auger, or shock-loaded rotating equipment drives, the WPDKS delivers all four interface advantages in one unit: direct motor mount, deep bore engagement, heavy bearing arrangement, and foot-mount stability. Covering sizes 50 through 175, input powers from 0.18 kW to 7.5 kW, bore diameters Ø20 to Ø80 mm, and gear ratios from 10:1 to 60:1. Manufactured to ISO 9001:2015, designed per AGMA 6034, and supplied by Ever-Power Worm Gear Reducer Co., Ltd. (Australia), 27 Harley Crescent, Condell Park NSW 2200.

WPDKS worm gear reducer IEC motor flange plus WPS-class deep hollow bore — Ever-Power Australia

Key Specifications & Parameters — WPDKS Series Worm Gear Reducer

All parameters per ISO 9001:2015, AGMA 6034, and IEC 60034-7. Bore tolerance H7 per DIN 286. ★ = tapered roller output bearing.

Size Input Power (kW) Ratio Range Centre Dist. A (mm) Length B (mm) Height H (mm) Bore Depth HL (mm) IEC Flange LA (mm) Output Bore Ø (mm) Weight (kg)
50 0.18 10:1–60:1 155 107 180 130 115 Ø20 8
60 0.37 10:1–60:1 170 117 205 150 130 Ø25 10.5
70 0.55 10:1–60:1 200 131 235 175 145 Ø30 15
80 ★ 0.75 10:1–60:1 228 144 265 200 160 Ø35 23
100 ★ 1.5 10:1–60:1 266 175 327 250 165 Ø40 38
120 ★ 3.0 10:1–60:1 340 200 388 300 200 Ø45 65
155 ★ 5.5 10:1–60:1 442 312 483 390 265 Ø70 120
175 ★ 7.5 10:1–60:1 465 334 550 435 265 Ø80 150

★ Sizes 80 and above: tapered roller output bearings for combined radial and axial load capacity.

What Is the WPDKS and Where Does It Fit in the WP Family?

WPDKS worm reducer IEC flange input and deep hollow bore output detail
WPDKS worm reducer tapered roller bearing output and WPS housing

The WPDKS can be understood as the intersection of the WPDKA and the WPKS: it combines the IEC B5 motor-direct input of the WPDKA with the deeper bore engagement, tapered roller output bearings, and WPS-class housing of the WPKS. In the WP configuration matrix, it occupies the most demanding quadrant — the four-feature combination that no other single WP unit provides:

Feature WPDKA WPKS WPDKS
IEC B5 motor flange input ✅ ❌ ✅
Hollow bore output ✅ ✅ ✅
WPS-class deep bore (HL) ❌ (WPKA-class) ✅ ✅
Tapered roller output bearing (80+) ❌ ✅ ✅
No input coupling required ✅ ❌ ✅
No output coupling required ✅ ✅ ✅
WPDKS worm gear reducer complete assembly with IEC motor flanged on

How to Select the WPDKS — When to Choose It Over WPDKA or WPKS

Specify WPDKS when all three of the following are true for your application:

  • IEC B5 motor is available and direct mounting is preferred — the motor frame is standard and you want to eliminate the input coupling, motor base, and alignment procedure.
  • The driven shaft requires deep bore engagement — the shaft engagement length needed exceeds the WPDKA’s WPKA-class bore depth (HL), or the application involves shock loading, reversing torque, or sustained high-cycle fatigue that benefits from the WPS-class bore engagement depth and tapered roller bearings.
  • Output coupling elimination is also required — the machine layout requires the driven shaft to pass directly into the output bore, and adding an output coupling is not acceptable due to space, maintenance, or contamination constraints.

If only the first condition applies — direct motor mount but light output shaft load — specify WPDKA. If only the second and third conditions apply — deep bore and no output coupling but existing motor input arrangement — specify WPKS. If all three apply, specify WPDKS.

  1. Confirm IEC Motor Frame: Select motor frame based on power. Cross-reference with WPDKS IEC flange acceptance range (same as WPDKA) for your chosen frame size.
  2. Confirm Bore Diameter and Engagement: Verify driven shaft diameter ≤ WPDKS standard bore at your frame. Verify shaft engagement length ≤ WPDKS HL (deep bore depth listed in spec table above). For shock loads (SF ≥ 1.5), specify WPDKS over WPDKA at the same frame regardless of engagement length adequacy.
  3. Calculate Torque with Service Factor: WPDKS rated output torques equal the WPKS (WPS-class) at the same frame size. Apply SF 1.5 for chain conveyor and auger applications; SF 2.0 for mining feeder and impact loads.
  4. Thermal Check: Same derating applies as WPKS — 10% per 10 °C above 20 °C ambient. Specify synthetic ISO VG 220 for Queensland and WA summer conditions.

Accessories We Also Supply: Shrink disc assemblies (Ø35+ bores), heavy-duty torque arm kits, motor support brackets (frame 100+), IEC adaptor rings, tapered roller bearing replacement sets, and Viton bore seals. Contact Ever-Power Australia.

WPDKS Applications in Australian Heavy-Duty and Compact Drive Design

  • Heavy Chain Conveyor Drives (Sydney, Melbourne, Brisbane): Chain conveyors carrying stone, grain, or processed food where the head shaft diameter is 40–70 mm and the engagement depth requirement exceeds 150 mm. The WPDKS 100–120 with a 1.5–3.0 kW 90–112 frame IEC motor provides direct motor mount, 250–300 mm bore engagement, and tapered roller bearings — all in one foot-mounted unit.
  • Agricultural Auger Drives (QLD, NSW, SA): Grain and fertiliser auger head shafts in Australian broadacre farming where PTO or electric motor drives must mount compactly with no external couplings. The WPDKS 80–100 at 20:1–30:1 with a 0.75–1.5 kW 80–90 frame motor suits auger shaft diameters of 35–40 mm with engagement depths of 200–250 mm.
  • Mining Feeder and Screen Drives (WA, QLD): Vibrating screen head shaft drives and apron feeder drives in Queensland coal and WA iron ore operations where both deep bore engagement (to resist shock-reversal fretting) and direct motor mounting (to minimise machine envelope in confined underground or elevated platform installations) are required simultaneously.
  • Food Processing Mixer Drives (Sydney, Adelaide): Large paddle mixer and ribbon blender shaft drives in Australian food plants where the IP65-rated IEC motor flanges directly to the WPDKS, the mixer shaft passes into the deep bore, and no external couplings are present — satisfying both the drive engineering requirement and the AS/NZS 4696 food machinery hygiene standard’s preference for coupling-free designs in food-contact-adjacent environments.

What Australian Customers Say About the WPDKS Series

★★★★★

“Our Brisbane chain conveyor head shaft is Ø40 mm, 240 mm engagement. The WPDKS 100 fits perfectly — IEC 90B5 motor flanges straight on, the shaft goes all the way into the 250 mm bore with the shrink disc locking it. Zero fretting after 18 months of two-shift operation. Replaced a WPDKA that had bore wear at 12 months.”

— Brett M., Conveyor Engineer, Brisbane QLD

★★★★★

“WPDKS 120 at 30:1 on our grain auger drive in SA. The 3 kW 112B5 motor flanges straight on — no motor base needed in our compact grain shed layout. 300 mm bore depth handles the auger shaft engagement perfectly. The tapered roller bearings at size 120 make a real difference under the harvest season reversing loads.”

— Lisa B., Agricultural Engineer, Yorke Peninsula SA

★★★★☆

“Using WPDKS 80 units on vibrating screen feeder shafts in our WA operation. The combination of direct motor mount and deep bore with tapered rollers is exactly what this application needs. 4 stars rather than 5 because our non-standard Ø38 bore took 3 weeks — standard sizes are much faster.”

— Shane O., Site Manager, Pilbara WA

★★★★★

“WPDKS 100 on our food plant mixer shaft drive in Sydney. IP65 motor flanged on, mixer shaft into the bore — no coupling anywhere. Passed our food safety audit first time. The Ever-Power team confirmed the IEC flange and bore compatibility together in one calculation — that’s the kind of service that saves us time.”

— Michelle R., Plant Engineer, Sydney NSW

Why Choose Ever-Power for WPDKS Worm Reducers in Australia?

Ever-Power Worm Gear Reducer Co., Ltd. (Australia) at 27 Harley Crescent, Condell Park NSW 2200 provides WPDKS units with free dual-interface engineering support — confirming both IEC flange compatibility and bore engagement adequacy in a single written recommendation within one business day. Standard bore configurations dispatch in 5–10 business days. See our capabilities at About Us and technical reference at worm-gearbox.top.

Frequently Asked Questions — WPDKS Series Worm Gear Reducer

1. What is the practical difference between WPDKS and WPDKA for a chain conveyor drive?+
At size 100, the WPDKS provides a bore depth (HL) of 250 mm versus 100 mm for the WPDKA — 150% deeper engagement. For a chain conveyor head shaft of Ø40 mm at 250 mm engagement length, this means the WPDKS uses the full bore depth and provides the maximum key contact area, reducing keyway flank stress by approximately 60% compared with a WPDKA at the same torque load. The tapered roller output bearing in the WPDKS (versus deep-groove ball in WPDKA) also handles the combined radial and axial forces from the torque arm reaction and chain tension without distortion of the bore alignment over time. If your shaft engagement is less than 100 mm and shock loading is light, the WPDKA is adequate and lower cost. If engagement is deeper or shock loading significant, specify WPDKS.
2. Does the WPDKS torque arm need to be heavier than the WPDKA torque arm?+
Yes — the WPDKS torque arm is dimensionally heavier than the WPDKA torque arm at the same frame size, matching the WPKS torque arm specification. The WPS-class housing of the WPDKS has a higher rated output torque than the WPA-class WPDKA, and the torque arm pin load scales proportionally with output torque. Using a WPDKA torque arm on a WPDKS would underrate the pin and bracket for the higher loads. WPDKS-specific torque arm kits are stocked by Ever-Power for all frame sizes and are the correct replacement item — do not substitute WPDKA torque arm kits on WPDKS units.
3. Can the WPDKS be supplied with a shrink disc for the output bore?+
Yes — shrink disc engagement is available for WPDKS bore sizes Ø35 mm and above (sizes 80–175). The shrink disc provides zero-clearance, zero-backlash engagement that completely prevents bore fretting regardless of shaft engagement length. For the WPDKS used in shock-loaded applications (mining, heavy grain, reversing augers), the shrink disc option is strongly recommended over the standard key-and-setscrew engagement, as it eliminates the clearance that allows micro-movement under shock. Specify shrink disc at order time with the driven shaft diameter — Ever-Power supplies the matched shrink disc model with the WPDKS.
4. What maintenance is needed on the WPDKS tapered roller output bearing?+
The tapered roller output bearing in WPDKS sizes 80 and above shares the oil sump with the worm gear mesh — no separate bearing lubrication is required. Maintain the correct ISO VG 220 oil level in the housing and change oil at 2,500-hour intervals (mineral) or 5,000-hour intervals (synthetic). Inspect housing vibration every 5,000 hours — a cyclic rumble or knocking at output frequency indicates tapered roller wear rather than preload loss. Replace the full tapered roller set with shim re-adjustment if abnormal noise develops. Tapered roller replacement sets for all WPDKS frame sizes are stocked by Ever-Power as standard spare parts.
5. Is the WPDKS suitable for continuous 24/7 heavy-duty operation in Queensland summer conditions?+
Yes, with appropriate thermal margin management. For Queensland summer operation at 40–45 °C ambient in continuous 24/7 heavy-duty service: select a WPDKS frame size with a thermal rated power at least 20% above the motor input power (accounting for a 20% derating at 40–45 °C ambient versus the 20 °C datasheet reference); specify synthetic PAO ISO VG 220 oil, which improves thermal performance by 4–6% and extends oil-change interval to 5,000 hours; and confirm motor thermal class is suitable for elevated ambient (Class F or H motor insulation recommended). Ever-Power’s engineering team can calculate the derated thermal power at your specific ambient temperature and confirm WPDKS frame size suitability — provide motor kW, ratio, ambient temperature, and daily hours of operation for a free written assessment.

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