{"id":1842,"date":"2026-05-26T08:56:44","date_gmt":"2026-05-26T08:56:44","guid":{"rendered":"https:\/\/chinawormgearbox.xyz\/product\/wpks-hollow-shaft-single-speed-worm-gear-reducer-with-cooling-fins\/"},"modified":"2026-05-26T08:56:44","modified_gmt":"2026-05-26T08:56:44","slug":"wpks-hollow-shaft-single-speed-worm-gear-reducer-with-cooling-fins","status":"publish","type":"product","link":"https:\/\/chinawormgearbox.xyz\/zh\/product\/wpks-hollow-shaft-single-speed-worm-gear-reducer-with-cooling-fins\/","title":{"rendered":"WPKS Hollow Shaft Single Speed Worm Gear Reducer with Cooling Fins"},"content":{"rendered":"
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WPKS Hollow Shaft Single Speed Worm Gear Reducer with Cooling Fins \u2014 Thermally Stable Direct-Mount Drive for Food, Beverage & Packaging Lines<\/h1>\n

Food and beverage production lines present two simultaneous gearbox challenges: the need for a clean, coupling-free drive connection that simplifies machine hygiene and maintenance, and the thermal demands of continuous high-frequency operation in warm production environments. The WPKS hollow shaft worm gear reducer<\/strong> addresses both challenges simultaneously \u2014 delivering the installation simplicity of a direct shaft-mount hollow bore combined with the enhanced thermal performance of an integral cooling fin array.<\/p>\n

The WPKS maintains oil temperatures up to 15\u00b0C lower than the smooth-body WPKA at equivalent load \u2014 extending lubricant service life, reducing seal wear, and ensuring reliable continuous operation during long production shifts. Available in 12 frame sizes<\/strong> (40\u2013250 mm) with ratios 1\/5 to 1\/60 and an H7 precision hollow bore for coupling-free shaft mounting. \u5173\u4e8e\u6c38\u6052\u4e4b\u529b<\/a> | \u83b7\u53d6\u62a5\u4ef7<\/a><\/p>\n<\/section>\n

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Technical Specifications<\/h2>\n

WPKS shares the WPKA base footprint with increased housing height (HL) due to the integral cooling fins. S = hollow bore diameter; W\u00d7Y = bore keyway. All dimensions in mm; reference input speed 1500 r\/min<\/strong>.<\/p>\n

\"WPKS<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Size<\/th>\nRatio<\/th>\nA<\/th>\nAB<\/th>\nB<\/th>\nCC<\/th>\nH<\/th>\nHL<\/th>\nM<\/th>\nN<\/th>\nE<\/th>\nF<\/th>\nG<\/th>\nZ<\/th>\nHS<\/th>\nU<\/th>\nT\u00d7V<\/th>\nS(bore)<\/th>\nW\u00d7Y(keyway)<\/th>\nWt(kg)<\/th>\n<\/tr>\n<\/thead>\n
40<\/td>\n1\/5\u20131\/60<\/td>\n143<\/td>\n87<\/td>\n85<\/td>\n40<\/td>\n141<\/td>\n60<\/td>\n90<\/td>\n100<\/td>\n70<\/td>\n80<\/td>\n13<\/td>\n10<\/td>\n25<\/td>\n12<\/td>\n4\u00d72.5<\/td>\n16<\/td>\n6\u00d718.8<\/td>\n4<\/td>\n<\/tr>\n
50<\/td>\n<\/td>\n175<\/td>\n108<\/td>\n105<\/td>\n50<\/td>\n180<\/td>\n80<\/td>\n120<\/td>\n140<\/td>\n95<\/td>\n110<\/td>\n15<\/td>\n12<\/td>\n30<\/td>\n12<\/td>\n4\u00d72.5<\/td>\n20<\/td>\n6\u00d722.8<\/td>\n7<\/td>\n<\/tr>\n
60<\/td>\n<\/td>\n198<\/td>\n120<\/td>\n110<\/td>\n60<\/td>\n207<\/td>\n90<\/td>\n130<\/td>\n150<\/td>\n105<\/td>\n120<\/td>\n20<\/td>\n11<\/td>\n40<\/td>\n15<\/td>\n5\u00d73<\/td>\n25<\/td>\n8\u00d728.3<\/td>\n10.5<\/td>\n<\/tr>\n
70<\/td>\n<\/td>\n231<\/td>\n140<\/td>\n130<\/td>\n70<\/td>\n238<\/td>\n105<\/td>\n150<\/td>\n190<\/td>\n115<\/td>\n150<\/td>\n20<\/td>\n15<\/td>\n40<\/td>\n18<\/td>\n5\u00d73<\/td>\n30<\/td>\n8\u00d733.3<\/td>\n14.5<\/td>\n<\/tr>\n
80<\/td>\n<\/td>\n261<\/td>\n160<\/td>\n150<\/td>\n80<\/td>\n270<\/td>\n120<\/td>\n170<\/td>\n220<\/td>\n135<\/td>\n180<\/td>\n20<\/td>\n15<\/td>\n50<\/td>\n22<\/td>\n7\u00d74<\/td>\n35<\/td>\n10\u00d738.3<\/td>\n22<\/td>\n<\/tr>\n
100<\/td>\n<\/td>\n322<\/td>\n190<\/td>\n160<\/td>\n100<\/td>\n331<\/td>\n150<\/td>\n193<\/td>\n270<\/td>\n155<\/td>\n220<\/td>\n25<\/td>\n15<\/td>\n50<\/td>\n25<\/td>\n7\u00d74<\/td>\n40<\/td>\n12\u00d743.3<\/td>\n36<\/td>\n<\/tr>\n
120<\/td>\n<\/td>\n371<\/td>\n219<\/td>\n175<\/td>\n120<\/td>\n423<\/td>\n180<\/td>\n233<\/td>\n320<\/td>\n180<\/td>\n260<\/td>\n30<\/td>\n18<\/td>\n65<\/td>\n30<\/td>\n7\u00d74<\/td>\n45<\/td>\n14\u00d748.8<\/td>\n63<\/td>\n<\/tr>\n
135<\/td>\n<\/td>\n422<\/td>\n249<\/td>\n210<\/td>\n135<\/td>\n482<\/td>\n215<\/td>\n253<\/td>\n350<\/td>\n200<\/td>\n290<\/td>\n30<\/td>\n18<\/td>\n75<\/td>\n35<\/td>\n10\u00d74.5<\/td>\n60<\/td>\n18\u00d764.4<\/td>\n80<\/td>\n<\/tr>\n
155<\/td>\n<\/td>\n497<\/td>\n295<\/td>\n256<\/td>\n155<\/td>\n541<\/td>\n235<\/td>\n275<\/td>\n390<\/td>\n220<\/td>\n320<\/td>\n35<\/td>\n21<\/td>\n85<\/td>\n40<\/td>\n12\u00d75<\/td>\n70<\/td>\n20\u00d774.9<\/td>\n114<\/td>\n<\/tr>\n
175<\/td>\n<\/td>\n534<\/td>\n314<\/td>\n282<\/td>\n175<\/td>\n600<\/td>\n260<\/td>\n310<\/td>\n430<\/td>\n250<\/td>\n350<\/td>\n40<\/td>\n20<\/td>\n85<\/td>\n45<\/td>\n14\u00d75.5<\/td>\n80<\/td>\n22\u00d785.4<\/td>\n150<\/td>\n<\/tr>\n
200<\/td>\n<\/td>\n580<\/td>\n342<\/td>\n320<\/td>\n200<\/td>\n677<\/td>\n290<\/td>\n360<\/td>\n480<\/td>\n290<\/td>\n390<\/td>\n40<\/td>\n22<\/td>\n95<\/td>\n50<\/td>\n14\u00d75.5<\/td>\n85<\/td>\n22\u00d790.4<\/td>\n218<\/td>\n<\/tr>\n
250<\/td>\n<\/td>\n705<\/td>\n420<\/td>\n400<\/td>\n250<\/td>\n824<\/td>\n350<\/td>\n460<\/td>\n560<\/td>\n380<\/td>\n480<\/td>\n45<\/td>\n28<\/td>\n110<\/td>\n60<\/td>\n18\u00d77<\/td>\n110<\/td>\n28\u00d790<\/td>\n365<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* HL = total height including cooling fin array. WPKS shares the identical base footprint (A, B, CC) with WPKA \u2014 it is a thermal upgrade with the same hollow bore dimensions.<\/p>\n<\/section>\n

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Product Structure \u2014 Hollow Bore + Integral Fin System<\/h2>\n
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\"WPKS<\/div>\n
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The WPKS integrates three distinct engineering features: an H7 precision hollow output bore with keyway, an integral longitudinal fin array on the housing top and side faces, and the proven FC25 grey cast iron body carrying the worm gear set. The fins and bore are both integral to the casting \u2014 no secondary bonding or bolt-on components \u2014 ensuring permanent performance and vibration resistance.<\/p>\n\n\n\n\n\n\n\n
Output Bore<\/td>\nH7 precision hollow bore with keyway \u2014 16 mm (size 40) to 110 mm (size 250)<\/td>\n<\/tr>\n
Cooling Fins<\/td>\nCast-integral longitudinal fins; up to +40% surface area vs WPKA; ~15\u00b0C temperature reduction<\/td>\n<\/tr>\n
Housing<\/td>\nFC25 grey cast iron; same base footprint as WPKA \u2014 direct thermal upgrade<\/td>\n<\/tr>\n
Input Shaft<\/td>\nSolid shaft with keyway; 5 direction positions (A\u2013E)<\/td>\n<\/tr>\n
Lubrication<\/td>\nSplash oil bath; N220\u2013N460 mineral or PG synthetic<\/td>\n<\/tr>\n
Bore Retention<\/td>\nSet screw standard; shrink disc optional for heavy or reversing loads<\/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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Dual Benefit: Hollow Bore + Thermal Fins<\/h3>\n

The WPKS is the only unit in the WP series combining hollow shaft coupling-free output with integral cooling fins. This dual specification delivers both machine simplification (no coupling) and thermal resilience (lower sustained temperature) in a single gearbox \u2014 eliminating two separate engineering compromises simultaneously. Keywords: hollow shaft worm gearbox with cooling, thermally stable hollow bore reducer.<\/em><\/p>\n<\/div>\n

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Coupling-Free H7 Direct Shaft Mount<\/h3>\n

The precision H7 hollow bore mates directly to a driven shaft ground to h6\/js6 tolerance. No coupling, no hub, no alignment tooling required. For packaging and food processing OEMs, this reduces machine assembly time and eliminates the coupling maintenance call that interrupts high-value production runs.<\/p>\n<\/div>\n

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~15\u00b0C Lower Operating Temperature<\/h3>\n

Integral longitudinal fins increase external surface area by up to 40% vs the WPKA, reducing sustained oil sump temperature by approximately 15\u00b0C under equivalent load. In food production environments where ambient temperatures can reach 30\u201335\u00b0C, this thermal margin ensures the gearbox stays well within its 95\u00b0C maximum oil temperature limit across full production shifts.<\/p>\n<\/div>\n

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\ufe0f<\/div>\n

Same Footprint as WPKA \u2014 Direct Thermal Upgrade<\/h3>\n

The WPKS shares the identical base footprint and bore dimensions with the WPKA. Where an existing WPKA installation is experiencing thermal issues in a food or packaging environment, the WPKS is a direct thermal upgrade with no mounting plate or shaft modification required. Verify the increased HL height clears the machine structure before ordering.<\/p>\n<\/div>\n

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\u2699\ufe0f<\/div>\n

Precision Worm Pair \u2014 Quiet, Efficient Transmission<\/h3>\n

Ground 20CrMnTi worm and ZCuSn10Pb1 bronze wheel to ISO 1328 Grade 7 tolerances deliver \u226472 dB(A) noise \u2014 important in food production facilities with operator noise regulations. Efficiency of 60\u201390% per ratio ensures competitive energy costs across continuous production runs.<\/p>\n<\/div>\n

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12 Frame Sizes, Full Ratio Range<\/h3>\n

Bore diameters from 16 mm (size 40) to 110 mm (size 250), with nine ratios (1\/5\u20131\/60), cover the driven shaft sizes and speed requirements found across the full range of food, beverage, and packaging processing equipment.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Industry Applications<\/h2>\n

The WPKS is specified for food, beverage, and packaging applications requiring both direct shaft mounting and thermal resilience during continuous production:<\/p>\n

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Beverage Bottling Lines<\/strong>Bottle washer conveyor drives, filling carousel auxiliaries, and labelling machine feed systems where continuous high-speed operation in warm, humid environments requires thermally stable hollow shaft drives.<\/span><\/div>\n

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Bakery & Food Processing<\/strong>Dough feeder screw drives, conveyor oven band drives, and portioning machine feed shafts where the hollow bore mounts directly onto process equipment shafts in environments with ambient temperatures up to 40\u00b0C.<\/span><\/div>\n

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Packaging Machinery<\/strong>Carton erector conveyor drives, form-fill-seal machine feed rollers, and palletiser conveyor drives requiring coupling-free, thermally stable drive units with long service intervals.<\/span><\/div>\n

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Dairy & Liquid Food<\/strong>Cream separator auxiliaries, mixer vessel drives, and filling line conveyors in dairy plants where production runs may span 16\u201320 hours and thermal stability is essential to avoid unexpected stops.<\/span><\/div>\n

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Cosmetics Manufacturing<\/strong>High-capacity mixing vessel drives and blending machine feed shafts in cosmetics factories that run multiple shifts in warm, enclosed production rooms.<\/span><\/div>\n

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Brewing & Winemaking<\/strong>Wort transfer pump auxiliaries, rotary drum dryer drives, and bottle conveyor systems in breweries and wineries requiring reliable drive units that maintain thermal stability during continuous seasonal production.<\/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 with CE Declaration of Conformity per shipment. Hollow bore verified to H7 tolerance by calibrated plug gauge at final inspection. CE compliance covers EU Machinery Directive 2006\/42\/EC and Australian market requirements.<\/p>\n<\/div>\n

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\ufe0f Thermal Run + Bore Test<\/h3>\n

Each WPKS undergoes a 60-minute thermal stability run<\/strong> at 110% rated torque, verifying oil sump temperature stabilises below 95\u00b0C. The hollow bore is subsequently measured for roundness and keyway position to confirm no thermal distortion during the run test.<\/p>\n<\/div>\n

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Material Standards<\/h3>\n

Housing: FC25 cast iron (\u2265250 MPa). Worm: 20CrMnTi (\u226558 HRC). Wheel: ZCuSn10Pb1 tin-bronze. All materials traceable; food-grade lubricant compatibility confirmed on request for food contact machinery documentation.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Why Choose Ever-power for WPKS Gearboxes<\/h2>\n
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\"Ever-power<\/div>\n
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We supply WPKS hollow shaft finned gearboxes to food processing OEMs, packaging machinery builders, and beverage equipment manufacturers in Italy, the USA, Saudi Arabia, Australia, and beyond. Our in-house hollow bore grinding and fin casting capabilities allow us to maintain dimensional consistency and thermal performance across large OEM supply programmes.<\/p>\n