{"id":1918,"date":"2026-05-27T06:45:16","date_gmt":"2026-05-27T06:45:16","guid":{"rendered":"https:\/\/chinawormgearbox.xyz\/product\/wpes-double-speed-worm-gear-reducer-with-cooling-fins\/"},"modified":"2026-05-27T06:45:17","modified_gmt":"2026-05-27T06:45:17","slug":"wpes-double-speed-worm-gear-reducer-with-cooling-fins","status":"publish","type":"product","link":"https:\/\/chinawormgearbox.xyz\/ur\/product\/wpes-double-speed-worm-gear-reducer-with-cooling-fins\/","title":{"rendered":"WPES Double Speed Worm Gear Reducer with Cooling Fins"},"content":{"rendered":"
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WPES Double Speed Worm Gear Reducer with Cooling Fins \u2014 Solving the Dual Thermal Challenge of Two-Stage Continuous Heavy-Duty Drives<\/h1>\n

A two-stage worm gearbox presents a unique thermal challenge: two gear meshes generating heat simultaneously, in a housing that must be thermally stable enough for continuous duty in cement plants, metallurgical facilities, and 24\/7 heavy process lines. The WPES double speed worm gear reducer<\/strong> is the purpose-engineered answer \u2014 combining the ultra-high reduction ratios (1\/200\u20131\/900) of the WPE two-stage design with deep integral cooling fins that dramatically extend natural convection surface area.<\/p>\n

The result is a thermally optimised two-stage worm gearbox<\/em> that maintains oil sump temperatures up to 18\u00b0C lower than the equivalent smooth-body WPEA at rated load \u2014 extending lubricant service life, protecting seals, and preventing overtemperature trips in hot plant rooms. Available in 9 size groups<\/strong> (40-70 through 155-250 mm), 5 shaft-direction positions, ratios 1\/200 to 1\/900. About Ever-power<\/a> | Request a Thermal Assessment<\/a><\/p>\n<\/section>\n

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Technical Specifications<\/h2>\n

WPES shares the WPEA base footprint but with a significantly increased housing height (HL) due to the fin array. HH = housing height including fins. Reference input speed 1500 r\/min<\/strong>. All dimensions in mm.<\/p>\n

\"WPES<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Size<\/th>\nRatio<\/th>\nA<\/th>\nAA<\/th>\nAB<\/th>\nBB<\/th>\nBE<\/th>\nHL<\/th>\nLL<\/th>\nH<\/th>\nHH<\/th>\nM<\/th>\nN<\/th>\nE<\/th>\nF<\/th>\nG<\/th>\nZ<\/th>\nHS<\/th>\nU<\/th>\nT\u00d7V<\/th>\nLS<\/th>\nS<\/th>\nW\u00d7Y<\/th>\nWt(kg)<\/th>\n<\/tr>\n<\/thead>\n
40-70<\/td>\n1\/200\u20131\/900<\/td>\n286<\/td>\n195<\/td>\n153<\/td>\n131<\/td>\n87<\/td>\n215<\/td>\n105<\/td>\n238<\/td>\n35<\/td>\n150<\/td>\n190<\/td>\n115<\/td>\n150<\/td>\n20<\/td>\n15<\/td>\n25<\/td>\n12<\/td>\n4\u00d72.5<\/td>\n60<\/td>\n28<\/td>\n7\u00d74<\/td>\n20<\/td>\n<\/tr>\n
50-80<\/td>\n<\/td>\n297<\/td>\n197<\/td>\n144<\/td>\n142<\/td>\n108<\/td>\n250<\/td>\n120<\/td>\n273<\/td>\n35<\/td>\n170<\/td>\n220<\/td>\n135<\/td>\n180<\/td>\n20<\/td>\n15<\/td>\n30<\/td>\n12<\/td>\n4\u00d72.5<\/td>\n65<\/td>\n32<\/td>\n10\u00d74.5<\/td>\n27<\/td>\n<\/tr>\n
60-100<\/td>\n<\/td>\n363<\/td>\n231<\/td>\n175<\/td>\n169<\/td>\n120<\/td>\n310<\/td>\n150<\/td>\n334<\/td>\n42<\/td>\n190<\/td>\n270<\/td>\n155<\/td>\n220<\/td>\n25<\/td>\n15<\/td>\n40<\/td>\n15<\/td>\n5\u00d73<\/td>\n75<\/td>\n38<\/td>\n10\u00d74.5<\/td>\n45<\/td>\n<\/tr>\n
70-120<\/td>\n<\/td>\n408<\/td>\n256<\/td>\n193<\/td>\n190<\/td>\n140<\/td>\n370<\/td>\n180<\/td>\n423<\/td>\n55<\/td>\n230<\/td>\n320<\/td>\n180<\/td>\n260<\/td>\n30<\/td>\n18<\/td>\n40<\/td>\n18<\/td>\n5\u00d73<\/td>\n85<\/td>\n45<\/td>\n12\u00d74.5<\/td>\n73<\/td>\n<\/tr>\n
80-135<\/td>\n<\/td>\n471<\/td>\n298<\/td>\n226<\/td>\n210<\/td>\n160<\/td>\n430<\/td>\n215<\/td>\n482<\/td>\n65<\/td>\n250<\/td>\n350<\/td>\n200<\/td>\n290<\/td>\n30<\/td>\n18<\/td>\n50<\/td>\n22<\/td>\n7\u00d74<\/td>\n95<\/td>\n55<\/td>\n16\u00d76<\/td>\n101<\/td>\n<\/tr>\n
100-155<\/td>\n<\/td>\n555<\/td>\n354<\/td>\n269<\/td>\n252<\/td>\n190<\/td>\n490<\/td>\n235<\/td>\n541<\/td>\n80<\/td>\n275<\/td>\n390<\/td>\n220<\/td>\n320<\/td>\n35<\/td>\n21<\/td>\n50<\/td>\n25<\/td>\n7\u00d74<\/td>\n110<\/td>\n60<\/td>\n18\u00d77<\/td>\n147<\/td>\n<\/tr>\n
120-175<\/td>\n<\/td>\n598<\/td>\n379<\/td>\n287<\/td>\n255<\/td>\n219<\/td>\n555<\/td>\n260<\/td>\n600<\/td>\n95<\/td>\n310<\/td>\n430<\/td>\n250<\/td>\n350<\/td>\n40<\/td>\n21<\/td>\n65<\/td>\n30<\/td>\n7\u00d74<\/td>\n110<\/td>\n65<\/td>\n18\u00d77<\/td>\n204<\/td>\n<\/tr>\n
135-200<\/td>\n<\/td>\n580<\/td>\n318<\/td>\n319<\/td>\n202<\/td>\n625<\/td>\n290<\/td>\n677<\/td>\n105<\/td>\n360<\/td>\n480<\/td>\n290<\/td>\n390<\/td>\n40<\/td>\n24<\/td>\n75<\/td>\n35<\/td>\n10\u00d74.5<\/td>\n125<\/td>\n70<\/td>\n20\u00d77.5<\/td>\n298<\/td>\n<\/tr>\n
155-250<\/td>\n<\/td>\n795<\/td>\n510<\/td>\n380<\/td>\n385<\/td>\n205<\/td>\n755<\/td>\n350<\/td>\n824<\/td>\n103<\/td>\n460<\/td>\n560<\/td>\n380<\/td>\n480<\/td>\n45<\/td>\n28<\/td>\n85<\/td>\n40<\/td>\n12\u00d75<\/td>\n155<\/td>\n90<\/td>\n25\u00d79<\/td>\n462<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* HL = full housing height including fin array; HH = lateral height offset. WPES shares identical base footprint (A, B, CC dimensions) with WPEA \u2014 direct thermal upgrade with H clearance verification required.<\/p>\n<\/section>\n

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Product Structure \u2014 Two-Stage Housing with Integral Fin Array<\/h2>\n
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\"WPES<\/div>\n
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The WPES elongated two-stage housing features cast-integral longitudinal fins on the top and outer side faces \u2014 the faces with the highest natural convection exposure in a foot-mounted installation. Both worm gear stages share the single oil bath, and the expanded fin array ensures that heat generated by both gear meshes can be dissipated by natural convection without exceeding the 95\u00b0C maximum sump temperature limit even in 40\u00b0C+ ambient conditions.<\/p>\n\n\n\n\n\n\n\n
Stages<\/td>\nTwo worm-and-wheel pairs in series; shared oil bath<\/td>\n<\/tr>\n
Cooling Fins<\/td>\nCast-integral longitudinal fins; up to +45% surface area vs WPEA; ~18\u00b0C cooler at rated load<\/td>\n<\/tr>\n
Ratio Range<\/td>\n1\/200 \u2013 1\/900<\/strong> two-stage combined<\/td>\n<\/tr>\n
Housing<\/td>\nFC25 cast iron; same base footprint as WPEA, increased height for fins<\/td>\n<\/tr>\n
Worm Pairs<\/td>\n20CrMnTi (\u226558 HRC) + ZCuSn10Pb1 bronze; both stages<\/td>\n<\/tr>\n
Thermal Gain<\/td>\n~18\u00b0C lower steady-state vs WPEA; accommodates 40\u00b0C+ ambient without supplemental cooling<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<\/div>\n<\/section>\n
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\u2705 Key Features & Benefits<\/h2>\n
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01<\/span><\/p>\n

Solves the Two-Stage Heat Problem<\/h3>\n

Two gear meshes means two sources of friction heat in one housing. The WPES fin array is sized to dissipate the combined thermal output of both worm pairs at rated load, preventing the cumulative heating that causes premature lubricant degradation and seal failure in smooth-body two-stage units. Keywords: thermally stable two-stage worm gearbox, double speed reducer with cooling.<\/em><\/p>\n<\/div>\n

02<\/span><\/p>\n

~18\u00b0C Lower Temperature vs WPEA<\/h3>\n

At rated load and 40\u00b0C ambient, the WPES oil sump temperature is approximately 18\u00b0C lower than the equivalent WPEA \u2014 a greater differential than the ~15\u00b0C achieved by the WPS single-stage fin variant, because the WPES fins must manage dual-stage heat generation. This margin keeps the unit within the 95\u00b0C maximum limit even in hot cement, metallurgical, and outdoor environments.<\/p>\n<\/div>\n

03<\/span><\/p>\n

Cast-Integral Fins \u2014 Permanent Performance<\/h3>\n

The cooling fins are cast as part of the housing in a single foundry pour, ensuring maximum thermal conductivity and permanent bond to the housing body. Unlike bolt-on heat sink accessories, there is no risk of fin loosening under the vibration and thermal cycling inherent in cement plant and mining environments.<\/p>\n<\/div>\n

04<\/span><\/p>\n

Extended Lubricant Life in Two-Stage Applications<\/h3>\n

Two-stage worm units run hotter than single-stage equivalents at the same input power. The WPES fin array reduces this temperature excess, extending ISO VG 320 mineral oil drain intervals from the 2,500-hour standard up to 3,500\u20134,000 hours in many continuous applications \u2014 a meaningful reduction in maintenance intervention frequency for remote or difficult-to-access drives.<\/p>\n<\/div>\n

05<\/span><\/p>\n

Drop-In Thermal Upgrade from WPEA<\/h3>\n

The WPES shares the identical base footprint, shaft dimensions, and shaft-direction options with the WPEA. Where an installed WPEA is experiencing overtemperature issues in a hot plant room, the WPES is the minimum-disruption upgrade \u2014 verify the available height clearance for the fin array (HL difference) and swap in place.<\/p>\n<\/div>\n

06<\/span><\/p>\n

Five Shaft-Direction Options<\/h3>\n

Standard positions A through E provide full installation flexibility for the WPES in the demanding environments where it is most needed \u2014 mine drives, cement plants, and chemical process lines \u2014 without requiring angle-drive accessories.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Industry Applications<\/h2>\n

The WPES is the thermal management solution for two-stage worm drives in the world’s most demanding high-temperature industrial environments:<\/p>\n

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Cement & Lime Production<\/strong>Kiln slow drives, clinker conveyor drives, and raw mill auxiliaries in hot cement plants where the WPES handles dual-stage heat generation in ambient temperatures up to 50\u00b0C without supplemental cooling.<\/span><\/div>\n

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\u2699\ufe0f<\/div>\n

Metallurgy & Rolling Mills<\/strong>Rolling mill main drive auxiliaries, bloom transfer table drives, and blast furnace charging equipment where continuous operation in high-ambient-temperature steel plant environments demands thermally stable two-stage drives.<\/span><\/div>\n

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\u26cf\ufe0f<\/div>\n

Mining \u2014 Hot Climate Applications<\/strong>Underground mine conveyors in deep hot mines (West Africa, India, Australia) and surface mineral processing plants in desert environments where ambient temperatures regularly exceed 40\u00b0C.<\/span><\/div>\n

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Chemical Process \u2014 Continuous Lines<\/strong>Continuous stirred-tank reactor (CSTR) drives and large agitator systems in chemical plants operating at 90%+ duty cycle in enclosed, poorly-ventilated plant rooms.<\/span><\/div>\n

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24\/7 Heavy Industrial Processes<\/strong>Glass furnace batch charger drives, rubber vulcanisation line auxiliaries, and any continuous industrial process operating three shifts per day where two-stage gearbox overheating has been a recurring maintenance issue.<\/span><\/div>\n

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Outdoor & Tropical Applications<\/strong>Irrigation pump station drives, sugar mill conveyor drives, and biomass processing equipment in tropical and subtropical regions where outdoor ambient temperatures exceed 45\u00b0C during summer production periods.<\/span><\/div>\n<\/div>\n<\/section>\n

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Quality Control & Certification<\/h2>\n
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ISO 9001:2015 & CE<\/h3>\n

Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. Fin casting quality is inspected at the foundry stage \u2014 incomplete fin fill, voids, or geometric deviation from spec are grounds for rejection before any machining commences.<\/p>\n<\/div>\n

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\ufe0f Dual-Stage Thermal Run Test<\/h3>\n

Each WPES undergoes a 90-minute thermal stability run<\/strong> at 110% rated torque with oil sump temperature measured at both gear stages. Temperature must stabilise below 95\u00b0C and the differential between the two stages must be within 8\u00b0C of each other, confirming that fin cooling is uniformly effective across the full two-stage housing length.<\/p>\n<\/div>\n

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\ufe0f Material & Fin Standards<\/h3>\n

Housing: FC25 cast iron (\u2265250 MPa). Both worm shafts: 20CrMnTi (\u226558 HRC). Wheel rims: ZCuSn10Pb1 tin-bronze. Fin pitch, height, and wall thickness verified against drawing spec. Third-party SGS\/BV inspection available for cement, steel, and chemical industry quality audits.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Why Choose Ever-power for WPES Double Speed Gearboxes<\/h2>\n
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\"Ever-power<\/div>\n
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We supply WPES thermally optimised two-stage worm gearboxes to cement OEMs, steel mill equipment builders, and chemical plant machinery manufacturers in the UK, Korea, India, Australia, and beyond. Our in-house foundry applies dedicated quality control for the WPES fin casting \u2014 fin geometry is verified at casting stage, not just after machining \u2014 ensuring consistent thermal performance across every unit.<\/p>\n