WDA & WDS Series Worm Gear Reducer

WDA & WDS Series (FCWDA / FCWDS) Worm Gear Reducer

The WDA/WDS series (FCWDA/FCWDS) represents the configuration with the highest level of integration within the W family: the IEC B5 flange input eliminates the need for an input coupling, while the hollow-shaft output eliminates the need for an output coupling.

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Description

The WDA & WDS Series (FCWDA / FCWDS) worm gear reducer achieves maximum drive integration within the W family dimensional convention: an IEC B5 motor-mounting flange at the input side eliminates the input coupling, while a hollow bore output eliminates the output coupling — resulting in a completely coupling-free drive train within the W series housing geometry. The FCWDA pairs the IEC flange with a WA-class bore depth, suited to smooth continuous loads where motor-direct convenience is the priority. The FCWDS upgrades the output to the WS-class deeper bore, delivering greater key engagement area, superior fretting resistance under shock and reversing torque, and the higher overhung load tolerance that chain-loaded conveyors, grain auger drives, and screw conveyor applications demand — all while retaining the IEC motor direct mount of the FCWDA. For Australian manufacturers and plant engineers across Sydney, Melbourne, Brisbane, Adelaide, and Perth who need both coupling-free interfaces in the W series dimensional envelope, the WDA/WDS is the answer. Covering sizes 50–155, input powers 0.18–5.5 kW, bore diameters Ø17–Ø60 mm, and ratios 10:1–60:1. 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.

WDA WDS Series FCWDA FCWDS worm gear reducer IEC flange input hollow bore output — Ever-Power Australia

Key Specifications & Parameters — WDA & WDS Series (FCWDA / FCWDS)

FCWDA — WA-Class Bore Depth

IEC B5 flange input + WA-class hollow bore output (HL-WDA). Motor-direct convenience + standard bore engagement. Best for smooth continuous loads in compact coupling-free drive designs.

FCWDS — WS-Class Bore Depth

IEC B5 flange input + WS-class deeper hollow bore output (HL-WDS). Same motor-direct convenience with up to 50% deeper bore engagement. Best for shock, chain-drive, and reversing loads.

All parameters per ISO 9001:2015, AGMA 6034, and IEC 60034-7. Bore tolerance H7/DIN 286. Output bore Ø is identical for FCWDA and FCWDS — only bore depth (HL) differs.

Size Power (kW) Ratio A (mm) B (mm) H (mm) HL-WDS (mm) HL-WDA (mm) Flange LA (mm) Bore Ø (mm) Weight (kg)
50 0.18 10:1–60:1 165 175 165 80 50 115 Ø17 7
60 0.37 10:1–60:1 185 190 195 93 60 130 Ø22 11
70 0.37–0.75 10:1–60:1 209 210 233 108 73 130 Ø28 15
80 0.75–1.5 10:1–60:1 242 240 268 123 83 165 Ø32 23
100 1.5 10:1–60:1 310 263 330 150 100 165 Ø38 38
120 2.2–3.0 10:1–60:1 361 315 395 180 120 215 Ø45 65
135 3.0–4.0 10:1–60:1 412 335 455 215 135 215 Ø55 84
155 5.5 10:1–60:1 442 402 493 235 135 265 Ø60 120

Green HL-WDS = FCWDS deep bore depth. Indigo HL-WDA = FCWDA standard bore depth. Output bore Ø is shared by both variants at each frame size.

What Are FCWDA and FCWDS — W Family’s Coupling-Free Pair

FCWDS WDS worm reducer IEC flange and WS-class deep bore detail

The FCWDA and FCWDS complete the W family’s configuration matrix by providing the same zero-coupling design that the WPDKA and WPDKS provide in the WP family, but within the W series dimensional convention — a critical distinction for Australian facilities running legacy machinery built around W series bore dimensions (Ø17–Ø60 mm) that differ from WP family bores (Ø20–Ø70 mm) at equivalent frame sizes.

The FCWDA is the W family’s equivalent of the WPDKA — IEC flange input combined with WA-class bore depth (HL-WDA). It suits applications where the driven shaft is smooth-loaded, the bore engagement requirement falls within the HL-WDA depth, and motor-direct convenience is the priority. The FCWDS is the W family’s equivalent of the WPDKS — the same IEC flange input, but with the WS-class deeper bore and the higher shock and fretting resistance it provides. At size 100, the FCWDS’s HL-WDS of 150 mm provides 50% more key engagement area than the FCWDA’s HL-WDA of 100 mm — directly extending bore life under cyclic and shock loading common in Australian chain conveyor and auger drives.

W Family Complete Interface Matrix — Where FCWDA/FCWDS Fit

W Family Model Motor Input Output Bore Depth Couplings Eliminated
WA Through-shaft coupling Hollow bore (WA depth) Standard Output only
WS Through-shaft coupling Hollow bore (WS depth) Deep Output only
FCWD IEC B5 flange Solid shaft (W-class) N/A Input only
FCWDA IEC B5 flange Hollow bore (WA depth) Standard Input AND output
FCWDS IEC B5 flange Hollow bore (WS depth) Deep Input AND output
WDA WDS Series FCWDA FCWDS worm reducer full range all sizes

How to Select FCWDA or FCWDS — Selection Guide

  1. FCWDA or FCWDS? Apply the same WA vs WS decision criteria: FCWDA for smooth continuous loads (SF ≤ 1.25, no shock, no chain/belt output); FCWDS for shock, reversing, or chain-loaded outputs (SF ≥ 1.5). When in doubt on a new design, specify FCWDS — the deeper bore costs ~8–12% more but provides measurably superior bore life under all loading conditions.
  2. W Family or WP Family? Specify FCWDA/FCWDS (W family) when: replacing existing FCWDA/FCWDS units; the machine uses W series bore dimensions (Ø17–Ø60 mm at these frame sizes); W-class housing mounting is required. Specify WPDKA/WPDKS (WP family) for new designs without legacy dimensional constraints, where IEC cross-brand interchange is a procurement priority.
  3. Confirm Both Interfaces: Verify the IEC motor frame against the FCWDA/FCWDS flange acceptance range AND verify the driven shaft diameter against the standard bore Ø for your chosen frame. Both must be satisfied — if the motor frame requires a larger flange than the standard FCWDA accepts, move to the next frame size.
  4. Bore Engagement Check: Confirm driven shaft engagement length ≤ HL-WDA (FCWDA) or HL-WDS (FCWDS). For FCWDS, verify shaft length against HL-WDS at your chosen frame size — the deeper bore allows longer shaft engagement, improving fretting resistance.
  5. Thermal Check for Australian Conditions: Derate thermal rated power by 10% per 10 °C above 20 °C reference. Specify synthetic ISO VG 220 oil for Queensland, WA, and NT summer environments where ambient exceeds 35 °C.

Accessories We Also Supply: IEC adaptor rings for non-standard motor frames, W-family torque arm kits (FCWDA and FCWDS specific), shrink disc assemblies (Ø22+ bores), motor support brackets (frame 100+), DIN 6885 parallel keys, and Viton bore seals. Contact Ever-Power Australia for pricing.

FCWDA & FCWDS Applications in Australian Industry

  • Legacy W-Convention Machine Upgrades (All States): Australian food, packaging, and conveyor machinery built around W-series hollow bore units (WA/WS) can adopt IEC motor direct mount by upgrading to FCWDA/FCWDS — retaining all existing driven shaft dimensions while eliminating input couplings, motor bases, and alignment procedures.
  • Packaging and Food Processing (Sydney, Melbourne, Brisbane): FCWDA units on conveyor roller drives, mixer agitator shafts, and filling auger drives where IP65 IEC motors flange directly to the reducer and driven shafts mount directly into the bore — zero coupling surfaces for AS/NZS 4696 food safety compliance.
  • Grain and Agricultural Auger Drives (QLD, NSW, SA): FCWDS at sizes 80–120 on grain auger head shafts where the IEC motor must flange directly to the compact reducer housing and the shaft engagement length and shock loading both exceed what the FCWDA provides. The WS-class deeper bore and higher fretting resistance handle sustained harvest-season reversing and stone-strike loads.
  • Water Infrastructure Gate and Valve Drives (Perth, Adelaide): FCWDA at sizes 100–135 at 40:1–60:1 on W-convention gate actuator systems where modern IEC brake motors must replace obsolete coupled motors without machine base modification — and where the hollow bore eliminates the output coupling that previously required regular maintenance.

What Australian Customers Say About the WDA & WDS Series

★★★★★

“Replaced WA units in our Sydney food plant with FCWDA — retained the W-convention bore dimensions on our existing shafts and eliminated the input coupling at the same time. Installation per drive dropped from 90 minutes to 18 minutes. Zero alignment tools needed. Should have done this years ago.”

— Lisa P., Engineering Manager, Sydney NSW

★★★★★

“FCWDS 100 at 30:1 on our Brisbane grain auger drive. The WS-class bore depth handles our auger shaft engagement length plus the stone-strike loads that wore out two FCWDA units in 14 months. Now 20 months in with zero bore damage. The deeper bore made all the difference.”

— Keith M., Grain Storage Engineer, Brisbane QLD

★★★★☆

“FCWDA 80 on our Melbourne packaging conveyor roller drives. IEC 80B5 brake motor flanges straight on, roller shaft goes directly into the bore. Very clean installation, passed our food safety audit. 4 stars because we needed to confirm whether FCWDA or FCWDS — a quick OHL comparison table in the catalogue would save that call.”

— Peter N., Packaging Engineer, Melbourne VIC

★★★★★

“Upgrading W-convention gate actuator drives in Perth water infrastructure. The FCWDA 135 at 60:1 with modern IEC brake motor drops straight into the original W-series machine base — no modifications. Motor swap during maintenance is 15 minutes now versus 2 hours with the old setup.”

— Colin R., Infrastructure Engineer, Perth WA

Why Choose Ever-Power for WDA & WDS Worm Reducers in Australia?

Ever-Power Worm Gear Reducer Co., Ltd. (Australia) at 27 Harley Crescent, Condell Park NSW 2200 stocks FCWDA and FCWDS units across common frame sizes for 5–10 business day dispatch. Our engineering team provides free dual-interface checks (IEC flange + bore) and FCWDA vs FCWDS selection analysis simultaneously. Visit About Us and worm-gearbox.top.

Frequently Asked Questions — WDA & WDS Series (FCWDA / FCWDS)

1. What is the difference between FCWDA (WDA) and WPDKA, and when should I choose each?+
Both provide IEC flange input and WA-class hollow bore output. The difference is dimensional convention: FCWDA uses W series bore diameters (Ø17–Ø60 mm at sizes 50–155) and W-series housing proportions; WPDKA uses WP series bore diameters (Ø20–Ø80 mm at sizes 50–175) and IEC/WP-standard housing proportions. These are NOT interchangeable at equivalent frame numbers — the bore diameters differ. Specify FCWDA to maintain compatibility with existing W-series driven shaft dimensions. Specify WPDKA for new designs where WP/IEC dimensional standards are preferred and cross-brand interchange is a priority.
2. At size 100, the FCWDS bore Ø is Ø38 mm but the WPKS bore Ø is Ø40 mm — are they interchangeable?+
No — they are NOT interchangeable. FCWDS size 100 bore is Ø38 mm (W series convention); WPKS size 100 bore is Ø40 mm (WP series convention). Fitting a Ø38 mm FCWDS onto a driven shaft machined for a Ø40 mm bore would leave a 1 mm radial clearance on each side — far exceeding the H7 tolerance specification and resulting in immediate bore fretting and key damage. Always match the gearbox to the driven shaft’s actual diameter: if the shaft is Ø38 mm, specify FCWDS; if Ø40 mm, specify WPDKS. Never substitute across W and WP families without confirming bore diameter compatibility.
3. Can FCWDS be used with a shrink disc for zero-clearance shaft engagement?+
Yes — shrink disc engagement is available for FCWDS bore sizes Ø22 mm and above (sizes 60–155). A shrink disc provides zero-clearance, zero-backlash engagement, completely preventing bore fretting by eliminating the micro-movement that causes it. For FCWDS applications in shock-loaded chain conveyor and grain auger drives where fretting is the primary life-limiting failure mode, the shrink disc option is strongly recommended. Specify at order time with the driven shaft diameter — Ever-Power supplies the matched shrink disc model for all W-family bore sizes.
4. How do I identify an existing FCWDA unit by measurement when the nameplate is missing?+
Measure: (1) bore diameter — compare against the WDA bore Ø column in the spec table above; (2) centre distance A — this identifies the frame size; (3) bore depth — if it matches the HL-WDA column, it is an FCWDA; if it matches HL-WDS, it is an FCWDS; (4) presence of IEC flange face (machined circular face with pilot bore and bolt holes) confirms it is an FC (flange) variant rather than a through-shaft WDA/WDS. If measurements fall between values, contact Ever-Power’s engineering team with all three measurements for confirmed identification.
5. What Australian Standards are relevant when specifying FCWDS for a chain conveyor with gravity loading?+
Key standards for a gravity-loaded chain conveyor application: AS 4024.1 (machinery safeguarding — chain guard and shaft guarding requirements); AS/NZS 3000 (electrical installation — motor wiring and VFD installation); AS 1418 (if the conveyor is classified as a lifting appliance). The FCWDS self-locks at ratios 20:1 and above, providing static load holding without power — but AS 4024 requires a positive mechanical brake for safety-critical gravity-loaded conveyors regardless of gearbox self-locking. An IEC brake motor mounted on the FCWDS flange satisfies this requirement. The FCWDS gearbox itself conforms to AGMA 6034 design standards, which are the recognised international reference for worm gear design adequacy in Australian machine design documentation.

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