{"id":1844,"date":"2026-04-16T05:45:58","date_gmt":"2026-04-16T05:45:58","guid":{"rendered":"https:\/\/worm-reducers.xyz\/?post_type=product&p=1844"},"modified":"2026-04-16T05:48:32","modified_gmt":"2026-04-16T05:48:32","slug":"wpex-double-stage-worm-gear-reducer-two-stage-drive","status":"publish","type":"product","link":"https:\/\/worm-reducers.xyz\/fr\/produit\/wpex-double-stage-worm-gear-reducer-two-stage-drive\/","title":{"rendered":"R\u00e9ducteur \u00e0 vis sans fin \u00e0 deux \u00e9tages WPEX | Entra\u00eenement \u00e0 deux \u00e9tages"},"content":{"rendered":"
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WPEX \u2014 Double Stage Worm Gear Reducer<\/div>\n

WPEX Double Stage R\u00e9ducteur \u00e0 vis sans fin<\/span> \u2014 Two Worm Stages, One Housing, Ultra-High Ratio<\/h2>\n

The WPEX is a two-stage r\u00e9ducteur \u00e0 vis sans fin<\/strong> with both worm reduction stages housed in a single cast iron body. Where a single-stage WP tops out at 60:1, the WPEX reaches ratios of several hundred to several thousand to one \u2014 delivering very low output speeds of 25\u2013300 rpm directly from a 1,500 rpm motor. Frame sizes Wpex40\/70 through 155\/250, output torque 17\u20133,000 N\u00b7m, input power 0.12\u201315 kW. Used in textile, glass, chemical, and metallurgical drives requiring very slow, high-torque output.<\/p>\n

Browse Worm Gear Reducers \u203a<\/a>
\nRequest Quote<\/a><\/div>\n<\/div>\n

<\/p>\n

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2-Stage<\/strong>
\nWorm Drive<\/span><\/div>\n
17\u20133,000 N\u00b7m<\/strong>
\nCouple de sortie<\/span><\/div>\n
25\u2013300 rpm<\/strong>
\nVitesse de sortie<\/span><\/div>\n
0,12\u201315 kW<\/strong>
\nPuissance d'entr\u00e9e<\/span><\/div>\n<\/div>\n

\"R\u00e9ducteur<\/p>\n

<\/p>\n

How the WPEX Double-Stage Worm Gear Reducer Works<\/h2>\n

In a single-stage r\u00e9ducteur \u00e0 vis sans fin<\/strong>, the maximum practical ratio is limited by worm geometry \u2014 typically 60:1 for standard WP series. The WPEX combines two worm pairs in series inside one housing. The output shaft of Stage 1 drives the worm shaft of Stage 2. The total reduction is the product of both stages:<\/p>\n

\n
Moteur<\/strong>
\n1,500 rpm<\/span><\/div>\n
\u2192<\/div>\n
Worm Stage 1<\/strong>
\nup to 60:1<\/span><\/div>\n
\u2192<\/div>\n
Worm Stage 2<\/strong>
\nup to 60:1<\/span><\/div>\n
\u2192<\/div>\n
Output<\/strong>
\n25\u2013300 rpm
\n17\u20133,000 N\u00b7m<\/span><\/div>\n<\/div>\n

A 20:1 \u00d7 30:1 WPEX delivers 600:1 from a standard motor. Compared to two separate single-stage r\u00e9ducteurs \u00e0 vis sans fin<\/strong> in series, the WPEX integrated housing eliminates the intermediate shaft coupling, reduces total drive length, and unifies oil maintenance into one service point.<\/p>\n

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WPEX Worm Gear Reducer \u2014 Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Param\u00e8tre<\/th>\nSp\u00e9cification<\/th>\n<\/tr>\n<\/thead>\n
Taper<\/td>\nDouble-stage worm gear reducer \u2014 two worm pairs in series, one housing<\/td>\n<\/tr>\n
Frame Size Range<\/td>\nWpex40\/70 \u00b7 40\/90 \u00b7 50\/90 \u00b7 50\/110 \u00b7 70\/110 \u00b7 70\/130 \u00b7 90\/130 \u00b7 90\/155 \u00b7 110\/155 \u00b7 110\/175 \u00b7 130\/175 \u00b7 130\/200 \u00b7 155\/200 \u00b7 155\/250<\/td>\n<\/tr>\n
Puissance d'entr\u00e9e<\/td>\n0,12\u201315 kW<\/td>\n<\/tr>\n
Vitesse d'entr\u00e9e<\/td>\n1,500 rpm (standard 4-pole motor)<\/td>\n<\/tr>\n
Vitesse de sortie<\/td>\n25\u2013300 rpm<\/td>\n<\/tr>\n
Couple de sortie<\/strong><\/td>\n17\u20133,000 N\u00b7m (series range)<\/strong><\/td>\n<\/tr>\n
Mat\u00e9riau du bo\u00eetier<\/td>\nCast aluminium \/ Cast iron (heavy torque frames)<\/td>\n<\/tr>\n
Manufacturing<\/td>\nHobbed (rolling gear) worm wheels; worm shafts precision ground, hardened<\/td>\n<\/tr>\n
Unit Weight Range<\/td>\n5\u2013500 kg (frame size dependent)<\/td>\n<\/tr>\n
Colour<\/td>\nGreen \/ Grey or on customer request<\/td>\n<\/tr>\n
Quality \/ Warranty<\/td>\nISO 9001 \u00b7 18 months from shipment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Dimensions<\/h3>\n

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\"WPEX<\/p>\n

 <\/p>\n<\/div>\n

<\/p>\n

WPEX Double Stage vs Single-Stage Worm Gear Reducer<\/h2>\n
\n\n\n\n\n\n\n\n\n\n
Point<\/th>\nSingle-Stage WPWO<\/th>\nWPEX Double Stage<\/th>\nTwo Separate Reducers<\/th>\n<\/tr>\n<\/thead>\n
Max ratio<\/td>\n60:1<\/td>\nThousands:1 (S1 \u00d7 S2)<\/td>\nUp to 3,600:1<\/td>\n<\/tr>\n
Intermediate coupling<\/td>\nNone<\/td>\nNone \u2014 integrated shaft<\/td>\nRequired \u2014 extra cost<\/td>\n<\/tr>\n
Oil maintenance<\/td>\n1 fill point<\/td>\n1 housing \u2014 unified<\/td>\n2 fill points, 2 checks<\/td>\n<\/tr>\n
Autobloquant<\/td>\nAt \u2265 20:1<\/td>\nBoth stages self-lock \u2014 strongest hold<\/td>\nIndependent per stage<\/td>\n<\/tr>\n
Best for<\/td>\nStandard drives \u2264 60:1<\/td>\nVery low output speed, compact<\/td>\nCustom intermediate stages needed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Key Design Advantages of the WPEX Double Stage Worm Gear Reducer<\/h2>\n
\n
\n
\ud83d\udcd0<\/div>\n

One Housing for Two Stages<\/h3>\n

Both worm reduction stages share one cast housing \u2014 no intermediate coupling, shorter drive train, simpler mounting compared to two separate r\u00e9ducteurs \u00e0 vis sans fin<\/strong> in series.<\/p>\n<\/div>\n

\n
\ud83d\udd07<\/div>\n

Low Noise Below 50 dB(A)<\/h3>\n

Worm mesh noise is lower than equivalent helical or spur stages. The WPEX cast iron housing provides additional vibration damping at both mesh frequencies \u2014 relevant in textile, food, and stage machinery environments.<\/p>\n<\/div>\n

\n
\ud83d\udd12<\/div>\n

Double Self-Locking<\/h3>\n

At high ratios where both stages are \u2265 20:1, both worm pairs independently self-lock. The strongest static hold of any WP-series r\u00e9ducteur \u00e0 vis sans fin<\/strong> configuration \u2014 back-drive must overcome two self-locking meshes simultaneously.<\/p>\n<\/div>\n

\n
\ud83d\udd27<\/div>\n

Single Oil Service Point<\/h3>\n

Both stages share one oil sump \u2014 one fill port, one drain, one change interval. Versus two separate units: half the oil service events, no intermediate shaft coupling to grease, simpler preventive maintenance schedule.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Applications of the WPEX Double Stage Worm Gear Reducer<\/h2>\n
\n
\n

\"WPEX<\/p>\n

<\/div>\n
\n

Textile, Glass Annealing & Chemical<\/h3>\n

Stenter frame pin chains, glass lehr roller drives, chemical paddle mixers requiring 2\u201315 rpm output. The WPEX double stage r\u00e9ducteur \u00e0 vis sans fin<\/strong> achieves these slow speeds directly from a 1,500 rpm motor.<\/p>\n<\/div>\n<\/div>\n

\n

\"WPEX<\/p>\n

<\/div>\n
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Metallurgy & Building Materials<\/h3>\n

Metallurgical casting conveyor drives, building material kiln car transport, and ceramic kiln roller drives \u2014 all require very slow output with high torque and absolute load-hold. Double self-locking of the WPEX is the standard solution.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\n

\"WPEX<\/p>\n

Korea Ever-Power worm gear reducer quality inspection \u2014 every unit tested before dispatch<\/p>\n<\/div>\n

<\/p>\n

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Composants d'entra\u00eenement adapt\u00e9s<\/h2>\n

The WPEX has two internal gear pairs \u2014 both are serviceable wear components. Korea Ever-Power supplies matched roues \u00e0 vis sans fin<\/a> for both Stage 1 and Stage 2 of this r\u00e9ducteur \u00e0 vis sans fin<\/strong>, ensuring each replaced wheel matches the original tooth profile and centre distance. Engrenage \u00e0 vis sans fin<\/a>\u00a0are also stocked for both stages \u2014 including the intermediate shaft that bridges Stage 1 output to Stage 2 input. Specify the WPEX frame code (e.g. 90\/50) and stage ratios when ordering replacement internals. For output shaft couplings to the driven equipment, contact Korea Ever-Power with shaft diameter and torque requirements for a suitable recommendation.<\/p>\n

\"worm<\/p>\n<\/div>\n

<\/p>\n

FAQ \u2014 WPEX Double Stage Worm Gear Reducer<\/h2>\n
\n
\n

What typical output speed range is the WPEX used for in practice?<\/h3>\n

Published range is 25\u2013300 rpm. In practice the WPEX r\u00e9ducteur \u00e0 vis sans fin<\/strong> is most commonly specified at the lower end \u2014 2\u201325 rpm \u2014 where a single-stage WP cannot achieve the needed speed from a standard motor. At 300 rpm output the total ratio is only 5:1, which a single-stage unit handles easily.<\/p>\n<\/div>\n

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Is the WPEX less efficient than a single-stage worm gear reducer at the same ratio?<\/h3>\n

Yes. Two mesh efficiency losses multiply together. If each stage is 75% efficient, combined efficiency is 56%. Motor sizing must account for this \u2014 a 100 W output load requires approximately 180 W motor input through the WPEX versus ~133 W for a single-stage r\u00e9ducteur \u00e0 vis sans fin<\/strong> at the same output. The motor size increase is accepted in exchange for the much higher reduction ratio in one unit.<\/p>\n<\/div>\n

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Can the WPEX worm gear reducer be used with a VFD for variable speed?<\/h3>\n

Yes. VFD-driven motor into WPEX is common in textile and chemical equipment for variable slow drives. Confirm motor thermal rating at reduced VFD frequencies \u2014 below 25 Hz a separately-powered cooling fan is typically needed for continuous duty. Apply a service factor of 1.2\u20131.3 to the torque requirement when specifying this double stage r\u00e9ducteur \u00e0 vis sans fin<\/strong> with VFD operation.<\/p>\n<\/div>\n

\n

How do I read the WPEX frame code?<\/h3>\n

Written as two numbers: WPEX[Stage1]\/[Stage2]. Stage 1 (input side) is always the larger frame. Example: WPEX130\/90 = 130 mm primary stage reducing into 90 mm secondary stage. Provide both the frame code and the individual ratio of each stage when ordering this double stage r\u00e9ducteur \u00e0 vis sans fin<\/strong>.<\/p>\n<\/div>\n

\n

Is the double self-locking feature reliable for safety-critical load-hold?<\/h3>\n

Double self-locking (both stages \u2265 20:1) is stronger than single-stage self-locking \u2014 a back-drive attempt must overcome the friction of two independent worm meshes. However for safety-critical hold applications such as elevated loads or machinery over personnel, verify experimentally at your maximum operating temperature and load. Do not rely solely on theoretical self-locking in safety-critical designs.<\/p>\n<\/div>\n

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What is the recommended oil change interval for the WPEX?<\/h3>\n

Change oil at 100 hours (first service \u2014 run-in flush). Then every 2,000\u20133,000 hours or 12 months in continuous service. The unified oil sump serves both stages \u2014 one oil change covers the complete r\u00e9ducteur \u00e0 vis sans fin<\/strong>. Maximum oil sump temperature: 95\u00b0C. If temperature rises continuously above this, stop and investigate overloading, blocked vent, or incorrect oil grade.<\/p>\n<\/div>\n

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Why choose WPEX over a helical-bevel gearbox at the same high ratio?<\/h3>\n

WPEX advantages over helical-bevel at very high ratios: lower cost, simpler housing (no bevel gear pair), lower noise at the slow output speeds typical of WPEX applications, and built-in self-locking eliminating the holding brake. Helical-bevel is more efficient \u2014 the efficiency penalty of the WPEX double worm stage is only meaningful where energy cost is a primary selection criterion. For most slow-speed industrial drives in textile, glass, and chemical applications, the WPEX r\u00e9ducteur \u00e0 vis sans fin<\/strong> is more cost-effective.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Customer Reviews \u2014 WPEX Double Stage Worm Gear Reducer<\/h2>\n
\n
\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“Used WPEX90\/50 for our glass lehr roller drive. Needed 2.8 rpm output from 1,500 rpm motor \u2014 impossible in single stage. The double stage worm gear reducer handles it perfectly and the double self-locking means the roller train holds when the motor stops. Running 20 months without issue.”<\/p>\n

Park Chae-won<\/strong>Plant Engineer, Busan Glass Products Co.<\/span><\/p>\n<\/div>\n

\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“WPEX130\/90 on a stenter frame main drive. Single housing saved 320 mm drive length versus two separate reducers in series. One oil change covers both stages. This worm gear reducer simplified our maintenance schedule significantly.”<\/p>\n

Lee Dong-jun<\/strong>Maintenance Engineer, Daegu Textile Machinery Plant<\/span><\/p>\n<\/div>\n

\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“Replaced a helical-bevel unit with WPEX70\/50 on a chemical mixer shaft. Lower cost, shorter lead time, and quieter than the bevel gearbox at our 8 rpm drive speed. The double stage worm gear reducer runs cooler than expected \u2014 good heat dissipation from the cast housing.”<\/p>\n

Kim Young-ju<\/strong>Process Engineer, Incheon Chemical Processing Co.<\/span><\/p>\n<\/div>\n

\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“WPEX110\/70 on a ceramic kiln car drive \u2014 5 rpm output, 450 N\u00b7m. Double self-locking holds the car position on the inclined kiln entrance ramp when the motor stops between cycles. The worm gear reducer has been running two-shift, 350 days per year for 26 months without any unplanned stop.”<\/p>\n

Oh Seung-bin<\/strong>Equipment Manager, Gyeongnam Ceramics Manufacturing<\/span><\/p>\n<\/div>\n

\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“Required 3.2 rpm on a sludge paddle drive for a wastewater treatment station. VFD + WPEX90\/50 at 466:1 total \u2014 clean, low noise, self-locking position hold between cycles. Previously we used a chain reduction stage plus single-stage worm gear reducer, which needed quarterly chain lubrication. The WPEX eliminated that maintenance entirely.”<\/p>\n

Jung Ha-eun<\/strong>Utilities Engineer, Daejeon Municipal Water Treatment<\/span><\/p>\n<\/div>\n

\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“Lead time was 8 days for a WPEX frame we had not used before. Korea Ever-Power sent dimensional drawings before order confirmation so we could verify mechanical fit. The double stage worm gear reducer arrived correctly sized and we had it running within 4 hours of delivery. Excellent technical support throughout.”<\/p>\n

Yoon Jae-young<\/strong>Project Engineer, Seoul Industrial Machinery Co.<\/span><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

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Specify Your WPEX Worm Gear Reducer<\/h2>\n

Send your required output rpm, torque, input motor power, and application duty cycle \u2014 Korea Ever-Power will confirm the WPEX frame combination and stage ratios within 24 hours.<\/p>\n

All Worm Gear Reducers \u203a<\/a>
\nContact Korea Ever-Power<\/a><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

WPEX series double stage worm gear reducer \u2014 two worm pairs in series within one cast iron housing. Frame sizes Wpex40\/70 through 155\/250. Input power 0.12\u201315 kW at 1,500 rpm input; output speed 25\u2013300 rpm; output torque 17\u20133,000 N\u00b7m. Achieves very high reduction ratios (hundreds to thousands:1) impossible in a single-stage WP unit. Both stages self-lock independently at ratios \u2265 20:1. Single unified oil sump for both stages. ISO 9001.<\/p>","protected":false},"featured_media":1846,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[1515],"product_tag":[],"class_list":{"0":"post-1844","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-worm-gear-reducer","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/product\/1844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/comments?post=1844"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/media\/1846"}],"wp:attachment":[{"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/media?parent=1844"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/product_brand?post=1844"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/product_cat?post=1844"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/worm-reducers.xyz\/fr\/wp-json\/wp\/v2\/product_tag?post=1844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}