{"id":1886,"date":"2026-06-26T06:27:56","date_gmt":"2026-06-26T06:27:56","guid":{"rendered":"https:\/\/speed-reducer-gearbox.com\/product\/eo-series-foot-mounted-double-worm-gear-reducer\/"},"modified":"2026-06-26T06:27:57","modified_gmt":"2026-06-26T06:27:57","slug":"eo-series-foot-mounted-double-worm-gear-reducer","status":"publish","type":"product","link":"https:\/\/speed-reducer-gearbox.com\/en\/product\/eo-series-foot-mounted-double-worm-gear-reducer\/","title":{"rendered":"EO Series Foot-Mounted Double Worm Gear Reducer"},"content":{"rendered":"
\n

EO Series Double Worm Gear Reducer with Vertical Output<\/h2>\n

The EO Series is a foot-mounted double-stage worm gear reducer<\/strong> with the output shaft pointing vertically upward. Unlike its motor-flange sibling (the EDO), the EO uses a bare input shaft that connects to the motor through a coupling, belt, or chain — giving engineers the freedom to offset the motor, add a pre-stage reduction, or use a non-IEC-standard prime mover. Ratios from 200:1 to 900:1 across five frame combinations (WP40–70 through WP155–250) deliver output torques up to 6,050 N·m. Dual self-locking worm stages hold the vertical load securely when the motor stops, providing a built-in safety function for gate actuators, screw lifts, and overhead positioning systems.<\/p>\n

\"EO<\/div>\n

Technical Specifications<\/h2>\n

The performance figures below are measured at 1,500 r\/min input under continuous duty. The EO shares the same WP-platform dual-housing construction as the EA and EDO series. Because the EO does not include a motor flange, the rated input power reflects the maximum power the first-stage worm shaft can accept via a coupling or belt drive from any speed reducer gearbox<\/a> compatible motor.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Frame Combo<\/th>\nInput Power (kW)<\/th>\nRatios<\/th>\nTorque at 300:1 (N·m)<\/th>\nPeak Torque (N·m)<\/th>\n<\/tr>\n<\/thead>\n
WP40–70<\/td>\n0.48<\/td>\n200:1 – 900:1<\/td>\n88<\/td>\n250<\/td>\n<\/tr>\n
WP60–100<\/td>\n0.95<\/td>\n200:1 – 900:1<\/td>\n276<\/td>\n500<\/td>\n<\/tr>\n
WP80–135<\/td>\n2.5<\/td>\n200:1 – 900:1<\/td>\n880<\/td>\n1,400<\/td>\n<\/tr>\n
WP120–175<\/td>\n5.09<\/td>\n200:1 – 900:1<\/td>\n2,340<\/td>\n3,050<\/td>\n<\/tr>\n
WP155–250<\/td>\n11.71<\/td>\n200:1 – 900:1<\/td>\n4,087<\/td>\n6,050<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Application Scenarios<\/h2>\n

Grain-Bin Slide Gates<\/h3>\n

Agricultural storage facilities use slide gates at the bottom of grain silos to control discharge flow. An EO at 400:1 drives the gate screw at approximately 3.75 r\/min, providing smooth, controllable gate travel. The foot-mounted layout allows the motor to sit on a shelf bracket offset from the gate frame, keeping it clear of grain dust accumulation. The dual self-locking worm gearbox<\/strong> stages hold the gate at any intermediate position without a separate locking pin.<\/p>\n

Stage Machinery and Theatre Lifts<\/h3>\n

Fly-bar winches and orchestra-pit lifts in performance venues demand silent, precise, self-locking drives. The EO’s worm mesh is inherently quieter than spur or helical gear alternatives, and the self-locking property holds scenery and platforms securely at any height. Frame combinations WP80–135 and WP100–155 match the load and speed requirements of most mid-size venue rigging systems.<\/p>\n

\"EO<\/p>\n

Foot-mounted layout and vertical output shaft position<\/p>\n<\/div>\n

Design and Construction<\/h2>\n

The EO consists of two bolted grey cast-iron housings mounted on a common foot base. The smaller first-stage casing carries the input shaft supported on tapered roller bearings; the larger second-stage casing holds the output shaft pointing vertically upward. Both stages use case-hardened alloy-steel worm shafts and centrifugally cast tin-bronze worm wheels. The foot base is machined flat across both housings in a single CNC setup to guarantee coplanarity, so the unit sits flush on the machine frame without shimming. Oil seals on every shaft penetration are double-lipped NBR with a dust-exclusion outer lip.<\/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. Each stage has its own worm pair, bearing set, and seal kit — all individually orderable by 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

Lubrication Guide<\/h2>\n

Fill each stage with ISO VG 220–320 EP gear oil. For the vertical-output second stage, increase the fill to submerge the worm wheel fully. Recommended oils include Shell Omala S2 G 220, Mobil Gears 627, and Texaco Meropa 320. Change the factory fill after 100 hours, then every 2,000 hours or annually. Synthetic oil (Mobil SHC 630) is recommended for continuous duty above six hours to reduce operating temperature by 10–20 °C.<\/p>\n

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

The EO foot-mount design gave us the flexibility to use our existing belt-drive setup from motor to reducer. Output torque is solid and consistent — no complaints after 14 months of three-shift operation.<\/p>\n

\n
J<\/div>\n
\n

James Li<\/p>\n

Conveyor Systems Integrator, QLD<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n★★★★☆<\/span><\/p>\n

We use two EO units on grain-bin discharge gates. The self-locking is reliable and the foot-mounted layout let us bolt them to our existing gate frames without any welding or adapter plates.<\/p>\n

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

Sandra Mitchell<\/p>\n

Operations Manager, Agricultural Co-op<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n★★★★★<\/span><\/p>\n

Replacement worm wheels arrived within three days from Ever-Power Sydney. The ability to buy individual components rather than a whole new gearbox saves us significant cost on planned maintenance shutdowns.<\/p>\n

\n
P<\/div>\n
\n

Paul Novak<\/p>\n

Millwright, Steel Fabrication<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Ever-Power Australia — Local Supply Partner<\/h2>\n

We stock EO frame combinations and replacement components at our Condell Park, NSW warehouse. Every unit includes ISO 9001 documentation and a factory oil fill. For textile-industry drives, see our FRV030 worm reducer for textile machinery<\/a> line. Reach out via contact us<\/a> or call +61 2 9708 3322.<\/p>\n

\"Worm<\/p>\n

Assembly and quality-control area<\/p>\n<\/div>\n

Frequently Asked Questions<\/h2>\n
\n1. How does the EO differ from the EDO? +<\/span><\/summary>\n
The EO<\/strong> is foot-mounted with a bare input shaft that connects to the motor via a coupling or belt. The EDO<\/strong> adds an IEC motor flange for direct motor mounting. Internal gear trains and torque ratings are identical.<\/div>\n<\/details>\n
\n2. Why would I choose a foot-mounted input over a motor flange? +<\/span><\/summary>\n
Foot-mounted inputs suit installations where the motor must be offset from the reducer — for example, when a belt or chain reduction stage sits between the motor and the gearbox, or when the motor needs to be repositioned for ventilation or access reasons.<\/div>\n<\/details>\n
\n3. What is the input speed range for the EO? +<\/span><\/summary>\n
Recommended input speed is 600–1,600 r\/min. Standard ratings are published at 1,500 r\/min. Lower input speeds reduce heat generation but also reduce output torque proportionally.<\/div>\n<\/details>\n
\n4. Can I add a motor flange later? +<\/span><\/summary>\n
Not as a field retrofit. The motor flange is integral to the first-stage housing casting. If you later decide you need direct motor mounting, order the EDO variant, which is otherwise mechanically identical.<\/div>\n<\/details>\n
\n5. Are the EO worm wheels interchangeable with single-stage units? +<\/span><\/summary>\n
Yes. Each stage uses the same worm wheel as the corresponding single-stage frame (e.g. the second stage in a WP120–175 combo uses a standard WP175 worm wheel).<\/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>\n","protected":false},"excerpt":{"rendered":"

The EO Series is a foot-mounted double-stage worm gear reducer with a vertical-upward output shaft and bare input for coupling or belt connection. Ratios from 200:1 to 900:1 deliver output torque up to 6,050 N\u00b7m. Dual self-locking stages hold the load without an external brake. Ideal for grain-bin discharge gates and stage-machinery lifts. This unit can replace Bonfiglioli VF-EP series foot-mounted and Rossi MR-2IV vertical-output double worm reducers with matching footprint and shaft tolerances.<\/p>\n","protected":false},"featured_media":1783,"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-1886","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\/en\/wp-json\/wp\/v2\/product\/1886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/speed-reducer-gearbox.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/speed-reducer-gearbox.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/en\/wp-json\/wp\/v2\/comments?post=1886"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/en\/wp-json\/wp\/v2\/media\/1783"}],"wp:attachment":[{"href":"https:\/\/speed-reducer-gearbox.com\/en\/wp-json\/wp\/v2\/media?parent=1886"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/en\/wp-json\/wp\/v2\/product_cat?post=1886"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/speed-reducer-gearbox.com\/en\/wp-json\/wp\/v2\/product_tag?post=1886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}