{"id":1889,"date":"2026-06-26T06:28:00","date_gmt":"2026-06-26T06:28:00","guid":{"rendered":"https:\/\/speed-reducer-gearbox.com\/product\/fa-series-flange-output-double-worm-gear-reducer\/"},"modified":"2026-06-26T06:28:01","modified_gmt":"2026-06-26T06:28:01","slug":"fa-series-flange-output-double-worm-gear-reducer","status":"publish","type":"product","link":"https:\/\/speed-reducer-gearbox.com\/de\/product\/fa-series-flange-output-double-worm-gear-reducer\/","title":{"rendered":"FA Series Flange-Output Double Worm Gear Reducer"},"content":{"rendered":"
\n

FA Series — Flange-Output Double Worm Gear Reducer<\/h2>\n

The FA Series takes the proven double-stage WP worm gear train and packages the output behind a square machined flange, allowing the reducer to bolt directly onto pumps, fans, clarifier rakes, and any driven machine with a mating flange interface. This close-coupled arrangement eliminates the base plate, flexible coupling, and alignment ritual that a foot-mounted output demands, saving both capital cost and ongoing maintenance hours. Five frame combinations (WP40–70 through WP155–250) with ratios from 200:1 to 900:1 deliver output torques up to 6,050 N·m. Dual self-locking worm stages hold the output in position when the motor stops, and the foot-mounted input connects to the motor through a coupling or belt for maximum layout flexibility.<\/p>\n

\"FA<\/div>\n

Where Flange Output Adds Value<\/h2>\n

Pump and Fan Drives<\/h3>\n

Vertical and horizontal centrifugal pumps from Sulzer, KSB, and Grundfos, as well as large industrial fans from Howden and TLT-Turbo, use flange-mounted inputs on their drive pedestals. The FA bolts directly to these flanges, creating a rigid, self-aligning connection that transmits torque without radial offset. This is mechanically superior to a foot-mounted reducer with a flexible coupling, particularly where vibration and misalignment cause premature coupling wear. Frame combinations WP80–135 and WP120–175 cover the power and torque range most medium-duty industrial gearbox<\/strong> pump applications require.<\/p>\n

Clarifier and Thickener Rakes<\/h3>\n

Water- and wastewater-treatment clarifiers use slow-speed rake drives to sweep settled sludge toward the discharge cone. An FA at 600:1 or 900:1 produces the 1–3 r\/min output these rakes need, and the flange connects directly to the centre-column drive housing. The self-locking worm gearbox<\/strong> property holds the rake stationary during maintenance, preventing free rotation under the weight of sludge on the blades.<\/p>\n

\"FA<\/p>\n

Square-flange output and foot-mounted input layout<\/p>\n<\/div>\n

Technical Data<\/h2>\n

All values measured at 1,500 r\/min input under continuous duty. The FA uses the same WP-platform gear pairs, bearings, and alloys as the entire double-stage range. Output flange bolt circles follow IEC\/GB standards and are noted in the frame-specific dimension sheet. contact us<\/a> with your frame combo for full drawings.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Frame Combo<\/th>\nMotor (kW)<\/th>\nRatios<\/th>\nTorque at 300:1 (N·m)<\/th>\nPeak Torque (N·m)<\/th>\n<\/tr>\n<\/thead>\n
WP40–70<\/td>\n0.12 – 0.48<\/td>\n200:1 – 900:1<\/td>\n88<\/td>\n250<\/td>\n<\/tr>\n
WP60–100<\/td>\n0.37 – 0.95<\/td>\n200:1 – 900:1<\/td>\n276<\/td>\n500<\/td>\n<\/tr>\n
WP80–135<\/td>\n1.5 – 2.5<\/td>\n200:1 – 900:1<\/td>\n880<\/td>\n1,400<\/td>\n<\/tr>\n
WP120–175<\/td>\n2.2 – 5.09<\/td>\n200:1 – 900:1<\/td>\n2,340<\/td>\n3,050<\/td>\n<\/tr>\n
WP155–250<\/td>\n5.5 – 11.71<\/td>\n200:1 – 900:1<\/td>\n4,087<\/td>\n6,050<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Construction Highlights<\/h2>\n

The FA pairs a first-stage and second-stage grey cast-iron housing, with the second-stage output face machined to a square-flange profile rather than the foot-pad layout used on the EA. The flange face is surface-ground to a flatness tolerance of 0.05 mm, ensuring flush mating with the driven machine bracket. All internal components — worm shafts, bronze wheels, tapered roller bearings, and NBR shaft seals — are identical to the EA, EDA, and EO variants, maintaining full parts interchangeability within the speed reducer gearbox<\/a> platform. The input side is a bare shaft with keyway, supported on tapered roller bearings, accepting a coupling, pulley, or chain sprocket.<\/p>\n

Components and Spare Parts<\/h2>\n

Every major component inside this reducer is available as an individual spare part, so a worn gear set or leaking seal never means replacing the entire unit. Our spare-parts inventory covers the full WP-platform range and ships from our Condell Park, NSW warehouse. The FA shares its full internal parts catalogue with the EA, EDA, and EO double-stage models. Each stage draws from the same worm-pair, bearing, and seal inventory as the corresponding single-stage frame size.<\/p>\n

\n
\n
⚙<\/div>\n

Worm Shaft<\/h4>\n

Case-hardened 20CrMnTi alloy steel, thread-ground to Ra 0.8 μm finish<\/p>\n<\/div>\n

\n
⚙<\/div>\n

Worm Wheel<\/h4>\n

Centrifugally cast ZCuSn10Pb1 tin-bronze, hobbed full-depth involute profile<\/p>\n<\/div>\n

\n
⚙<\/div>\n

Bearings<\/h4>\n

Tapered roller bearings handling combined radial and axial loads on both shafts<\/p>\n<\/div>\n

\n
⚙<\/div>\n

Seal & Gasket Kit<\/h4>\n

Double-lipped NBR oil seals, housing gaskets, breather plugs, and O-rings<\/p>\n<\/div>\n<\/div>\n

\"Worm<\/p>\n

Individual components available for order: worm shaft, bronze wheel, bearings, and seal kits<\/p>\n<\/div>\n

Oil and Service Schedule<\/h2>\n

Fill both stages with ISO VG 220–320 EP mineral gear oil for ambient temperatures up to 40 °C. Synthetic ISO VG 220 (Mobil SHC 630, Shell Omala S4 GX 220) is recommended for continuous duty above six hours. First oil change at 100 hours; thereafter every 2,000 hours or annually. When the flange output faces downward (e.g. on a vertical pump), verify the second-stage oil level covers the entire worm-wheel tooth zone to prevent dry-running the upper teeth.<\/p>\n

Customer Reviews<\/h2>\n
\n
\n★★★★★<\/span><\/p>\n

The flange output was the deciding factor. We bolted the FA directly to our vertical pump housing without any adapter plate. Alignment was spot-on out of the box. Twelve months in, zero issues.<\/p>\n

\n
N<\/div>\n
\n

Nathan Price<\/p>\n

Lead Engineer, Pump Manufacturer<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n★★★★☆<\/span><\/p>\n

Reliable performance on our clarifier rake drive. The flange-mount arrangement keeps the reducer close-coupled to the drive pinion, which reduced vibration compared with our old foot-mounted setup.<\/p>\n

\n
K<\/div>\n
\n

Karen Hughes<\/p>\n

Maintenance Planner, Municipal Water<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n★★★★★<\/span><\/p>\n

We spec the FA for bucket-elevator head drives on several projects. The flange interface eliminates the coupling and two bearing housings, cutting installation time by roughly 40 percent.<\/p>\n

\n
S<\/div>\n
\n

Steve Kim<\/p>\n

Applications Engineer, Material Handling<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Ever-Power Australia \u2014 Your Local Supplier<\/h2>\n

We stock FA frame combinations and all matching spare parts at our Condell Park, NSW facility. ISO 9001-certified, factory-tested, and backed by Sydney-based engineering support. We also supply FGV035 compact aluminium worm gearbox<\/a> for light-duty OEM equipment drives. Call +61 2 9708 3322 or email sales@speed-reducer-gearbox.com for pricing and lead times.<\/p>\n

\"Ever-Power<\/p>\n

Final inspection and export packing<\/p>\n<\/div>\n

Frequently Asked Questions<\/h2>\n
\n1. What is the advantage of a flange output over a foot mount? +<\/span><\/summary>\n
A flange output bolts the reducer directly to the driven machine housing — pump bracket, fan pedestal, or elevator head frame — eliminating the base plate, coupling, and alignment procedure needed with a foot-mounted unit. This reduces both installation time and ongoing maintenance.<\/div>\n<\/details>\n
\n2. Is the FA output flange a standard pattern? +<\/span><\/summary>\n
Yes. The output flange follows IEC and GB\/T standard bolt-circle patterns per frame size, so it mates directly with common pump, fan, and machine flanges without adapter plates.<\/div>\n<\/details>\n
\n3. Can I use the FA horizontally and vertically? +<\/span><\/summary>\n
Yes. The flange output can face any direction. Adjust the oil-fill level according to the installation angle per the frame-specific chart in the manual.<\/div>\n<\/details>\n
\n4. Does the FA self-lock? +<\/span><\/summary>\n
Yes. Both double-stage worm meshes self-lock at all standard ratios (200:1–900:1), providing a passive holding function that prevents the output from back-driving when the motor is off.<\/div>\n<\/details>\n
\n5. How does the FA compare with the EA? +<\/span><\/summary>\n
Both use the same double-stage gear train. The EA<\/strong> has a foot-mounted solid output shaft<\/strong>; the FA<\/strong> replaces the foot base and solid shaft with a square flange output<\/strong> for direct bolting to the driven machine.<\/div>\n<\/details>\n
\n

Ready to Get Started?<\/p>\n

Call +61 2 9708 3322<\/strong>  |  Email sales@speed-reducer-gearbox.com<\/strong><\/p>\n

Request a Quote<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

The FA Series packages a double-stage worm gear train behind a square machined output flange for direct bolting to pumps, fans, clarifier rakes, and bucket-elevator head frames. Foot-mounted input with coupling connection. Ratios from 200:1 to 900:1, output torque up to 6,050 N\u00b7m, dual self-locking stages. Eliminates the coupling and alignment needed with foot-mounted output models. Replaces Bonfiglioli VF-F\/EP series and Rossi MR-2V-F flange-output double worm reducers with matching flange bolt circles.<\/p>","protected":false},"featured_media":1786,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_cat":[2900],"product_tag":[],"class_list":["post-1889","product","type-product","status-publish","has-post-thumbnail","product_cat-double-worm-gear-reducer","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/product\/1889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/comments?post=1889"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/media\/1786"}],"wp:attachment":[{"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/media?parent=1889"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/product_cat?post=1889"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/de\/wp-json\/wp\/v2\/product_tag?post=1889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}