{"id":1927,"date":"2026-05-27T06:45:26","date_gmt":"2026-05-27T06:45:26","guid":{"rendered":"https:\/\/chinawormgearbox.xyz\/product\/wpeka-hollow-shaft-double-speed-worm-gear-reducer\/"},"modified":"2026-05-27T06:45:26","modified_gmt":"2026-05-27T06:45:26","slug":"wpeka-hollow-shaft-double-speed-worm-gear-reducer","status":"publish","type":"product","link":"https:\/\/chinawormgearbox.xyz\/de\/product\/wpeka-hollow-shaft-double-speed-worm-gear-reducer\/","title":{"rendered":"WPEKA Hollow Shaft Double Speed Worm Gear Reducer"},"content":{"rendered":"
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WPEKA Hollow Shaft Double Speed Worm Gear Reducer \u2014 Coupling-Free Ultra-High Ratio Drive for Heavy Mixers, Agitators & Slow-Speed Feeders<\/h1>\n

Large industrial mixing vessels, heavy-duty agitator equipment, and slow-speed bulk material feeders often require both a very high reduction ratio AND coupling-free output shaft connection. A single-stage hollow shaft gearbox (WPKA) can deliver coupling-free mounting but only to 1\/60 ratio \u2014 far short of the ultra-slow speeds many heavy process applications demand. The WPEKA hollow shaft double speed worm gear reducer<\/strong> bridges this gap by combining the coupling-free convenience of an H7 precision hollow output bore with the extreme ratio capability (1\/200\u20131\/900) of the two-stage WPE design.<\/p>\n

The WPEKA allows the driven shaft (mixer impeller shaft, feeder screw, agitator paddle shaft) to slide directly into the output bore without any coupling \u2014 eliminating the coupling alignment complexity while achieving the ultra-low output speeds required for heavy viscous mixing, crystallisation, and slow-rotation process equipment. Available in 9 size groups<\/strong> (40-70 through 155-250 mm), bore diameters 30\u2013110 mm, ratios 1\/200\u20131\/900. \u00dcber Ever-power<\/a> | Request a Bore Size Consultation<\/a><\/p>\n<\/section>\n

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Technical Specifications<\/h2>\n

Full dimensional data for all WPEKA sizes. S = hollow bore diameter (H7); W\u00d7Y = bore keyway. B = housing width at output bore face. HH = lateral height offset. All dimensions in mm; reference speed 1500 r\/min<\/strong>.<\/p>\n

\"WPEKA<\/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>\nB<\/th>\nBE<\/th>\nHH<\/th>\nHL<\/th>\nLL<\/th>\nH<\/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
40-70<\/td>\n1\/200\u20131\/900<\/td>\n286<\/td>\n195<\/td>\n153<\/td>\n130<\/td>\n87<\/td>\n35<\/td>\n215<\/td>\n105<\/td>\n238<\/td>\n150<\/td>\n190<\/td>\n115<\/td>\n150<\/td>\n20<\/td>\n15<\/td>\n25<\/td>\n12<\/td>\n4\u00d72.5<\/td>\n30<\/td>\n8\u00d733.3<\/td>\n20<\/td>\n<\/tr>\n
50-80<\/td>\n<\/td>\n297<\/td>\n197<\/td>\n144<\/td>\n150<\/td>\n108<\/td>\n35<\/td>\n250<\/td>\n120<\/td>\n273<\/td>\n170<\/td>\n220<\/td>\n135<\/td>\n180<\/td>\n20<\/td>\n15<\/td>\n30<\/td>\n12<\/td>\n4\u00d72.5<\/td>\n35<\/td>\n10\u00d738.3<\/td>\n27<\/td>\n<\/tr>\n
60-100<\/td>\n<\/td>\n363<\/td>\n231<\/td>\n175<\/td>\n160<\/td>\n120<\/td>\n42<\/td>\n310<\/td>\n150<\/td>\n334<\/td>\n190<\/td>\n270<\/td>\n155<\/td>\n220<\/td>\n25<\/td>\n15<\/td>\n40<\/td>\n15<\/td>\n5\u00d73<\/td>\n40<\/td>\n12\u00d743.3<\/td>\n44<\/td>\n<\/tr>\n
70-120<\/td>\n<\/td>\n408<\/td>\n256<\/td>\n193<\/td>\n175<\/td>\n140<\/td>\n55<\/td>\n370<\/td>\n180<\/td>\n430<\/td>\n230<\/td>\n320<\/td>\n180<\/td>\n260<\/td>\n30<\/td>\n18<\/td>\n40<\/td>\n18<\/td>\n5\u00d73<\/td>\n45<\/td>\n14\u00d748.8<\/td>\n73<\/td>\n<\/tr>\n
80-135<\/td>\n<\/td>\n471<\/td>\n298<\/td>\n226<\/td>\n210<\/td>\n160<\/td>\n65<\/td>\n430<\/td>\n215<\/td>\n480<\/td>\n250<\/td>\n350<\/td>\n200<\/td>\n290<\/td>\n30<\/td>\n18<\/td>\n50<\/td>\n22<\/td>\n7\u00d74<\/td>\n60<\/td>\n18\u00d764.4<\/td>\n101<\/td>\n<\/tr>\n
100-155<\/td>\n<\/td>\n555<\/td>\n354<\/td>\n269<\/td>\n256<\/td>\n190<\/td>\n80<\/td>\n490<\/td>\n235<\/td>\n531<\/td>\n275<\/td>\n390<\/td>\n220<\/td>\n320<\/td>\n35<\/td>\n21<\/td>\n50<\/td>\n25<\/td>\n7\u00d74<\/td>\n70<\/td>\n20\u00d774.9<\/td>\n144<\/td>\n<\/tr>\n
120-175<\/td>\n<\/td>\n598<\/td>\n379<\/td>\n287<\/td>\n282<\/td>\n219<\/td>\n95<\/td>\n555<\/td>\n260<\/td>\n600<\/td>\n310<\/td>\n430<\/td>\n250<\/td>\n350<\/td>\n40<\/td>\n21<\/td>\n65<\/td>\n30<\/td>\n7\u00d74<\/td>\n80<\/td>\n22\u00d785.4<\/td>\n201<\/td>\n<\/tr>\n
135-200<\/td>\n<\/td>\n662<\/td>\n425<\/td>\n318<\/td>\n320<\/td>\n256<\/td>\n105<\/td>\n625<\/td>\n290<\/td>\n666<\/td>\n360<\/td>\n480<\/td>\n290<\/td>\n390<\/td>\n40<\/td>\n24<\/td>\n75<\/td>\n35<\/td>\n10\u00d74.5<\/td>\n85<\/td>\n22\u00d790.4<\/td>\n293<\/td>\n<\/tr>\n
155-250<\/td>\n<\/td>\n795<\/td>\n510<\/td>\n380<\/td>\n400<\/td>\n295<\/td>\n103<\/td>\n755<\/td>\n350<\/td>\n800<\/td>\n460<\/td>\n560<\/td>\n380<\/td>\n480<\/td>\n45<\/td>\n28<\/td>\n85<\/td>\n40<\/td>\n12\u00d75<\/td>\n110<\/td>\n28\u00d7116.4<\/td>\n462<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* S = hollow bore diameter (H7 tolerance). Driven shaft must be ground to h6\/js6 for correct fit. W\u00d7Y = bore keyway dimensions. B = bore-face housing width. HH = lateral housing height offset. HS\/U\/T\u00d7V = standard solid input shaft dimensions.<\/p>\n<\/section>\n

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Product Structure \u2014 Two-Stage Cascade with H7 Hollow Output Bore<\/h2>\n
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\"WPEKA<\/div>\n
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The WPEKA replaces the solid output shaft of the WPEA with a precision-bored through-bore in the second-stage worm wheel shaft. The bore is ground to H7 tolerance and fitted with an internal keyway. The driven shaft slides directly into the bore from the housing face \u2014 located radially by the bore and rotationally by the keyway \u2014 creating a direct, compact, coupling-free connection to the process equipment shaft.<\/p>\n\n\n\n\n\n\n\n
Drive Stages<\/td>\nTwo worm-and-wheel pairs in series; ratio 1\/200\u20131\/900<\/td>\n<\/tr>\n
Output Bore<\/td>\nH7 precision hollow bore with keyway; 30 mm (size 40-70) to 110 mm (size 155-250)<\/td>\n<\/tr>\n
Bore Tolerance<\/td>\nH7 \u2014 mates with shaft ground to h6\/js6 for precise radial location<\/td>\n<\/tr>\n
Input Shaft<\/td>\nStandard solid shaft with keyway; 5 direction positions (A\u2013E)<\/td>\n<\/tr>\n
Housing<\/td>\nFC25 cast iron; same footprint as WPEA with bore-face housing width extension<\/td>\n<\/tr>\n
Axial Retention<\/td>\nSet screw standard; shrink disc optional for heavy 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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Coupling-Free Output at 1\/200\u20131\/900 Ratios<\/h3>\n

The WPEKA is the only product that simultaneously delivers coupling-free hollow bore output AND two-stage 1\/200\u20131\/900 reduction. Where the single-stage WPKA can provide hollow shaft mounting to 1\/60 and the solid-shaft WPEA can provide two-stage ratios, the WPEKA delivers both in one unit. Keywords: hollow shaft double speed worm gearbox, two-stage hollow bore worm reducer 1\/900.<\/em><\/p>\n<\/div>\n

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Direct-to-Shaft Integration for Complex Process Equipment<\/h3>\n

For large crystallisation vessels, heavy viscous material mixers, and slow-rotation reactor agitators where the impeller shaft is long and the coupling attachment point is difficult to access, the WPEKA’s direct bore-mount eliminates the coupling without requiring accessible shaft end clearance for coupling assembly.<\/p>\n<\/div>\n

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\ufe0f<\/div>\n

FC25 Cast Iron for Heavy-Duty Service<\/h3>\n

The two-stage FC25 grey cast iron housing provides the impact resistance and vibration damping needed for heavy mixing and agitation applications where cyclic loads, material consistency changes, and start-stop duty create challenging mechanical environments.<\/p>\n<\/div>\n

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\u2699\ufe0f<\/div>\n

Precision Bore H7 \u2014 No Field Reaming<\/h3>\n

The hollow bore is machined and ground to H7 tolerance in our facility \u2014 driven shafts ground to h6\/js6 mate directly without field reaming or fitting. This is important for large mixer installations where on-site machining is impractical.<\/p>\n<\/div>\n

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

Standard positions A through E maintain full installation flexibility for the WPEKA, allowing integration into heavy mixer and agitator drives from any input shaft direction to suit the motor position and machine layout.<\/p>\n<\/div>\n

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Wide Bore Size Range for Heavy Process Shafts<\/h3>\n

Bore diameters from 30 mm (size 40-70) to 110 mm (size 155-250) cover the full range of impeller shaft, agitator shaft, and screw shaft diameters used in heavy process equipment applications \u2014 from small laboratory reactors to large industrial mixing vessels.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Industry Applications<\/h2>\n

The WPEKA is the solution for heavy process applications requiring both coupling-free shaft mounting and ultra-high reduction ratios:<\/p>\n

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Large Chemical & Crystallisation Vessels<\/strong>Heavy crystallisation reactor agitators, large industrial mixer vessels, and specialty chemical blending tanks requiring ultra-slow impeller speeds (1\/400\u20131\/900 of motor speed) with coupling-free shaft engagement.<\/span><\/div>\n

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Heavy-Duty Agricultural & Feed Mixers<\/strong>Large animal feed mixer drum drives, industrial grain blending vessel drives, and fertiliser mixing plant drives requiring very low-speed high-torque hollow shaft coupling-free direct mounting.<\/span><\/div>\n

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\u26cf\ufe0f<\/div>\n

Mining & Mineral Processing<\/strong>Thickener raking slow drives, heavy flotation cell agitators, and mineral leaching tank mixing drives where the WPEKA mounts directly onto the agitator shaft without coupling hardware.<\/span><\/div>\n

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Industrial Food & Brewing<\/strong>Large brewing vessel agitator drives, industrial food blending drum drives, and commercial sauce\/condiment mixing vessel slow-speed drives requiring coupling-free compact hollow shaft mounting.<\/span><\/div>\n

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\u2697\ufe0f<\/div>\n

Specialty Chemical Processes<\/strong>Polymer dissolution vessel drives, textile dye vessel agitators, and industrial adhesive mixing vessel drives requiring very low impeller speed from compact, coupling-free two-stage hollow shaft units.<\/span><\/div>\n

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\u267b\ufe0f<\/div>\n

Waste & Environmental Treatment<\/strong>Industrial sludge mixer drives, heavy compost turning drum drives, and organic waste bioreactor agitator drives requiring ultra-slow rotation with direct hollow shaft coupling-free mounting.<\/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. WPEKA hollow bore verified to H7 tolerance by calibrated plug gauge, and bore-to-second-stage-shaft concentricity checked (\u22640.05 mm TIR) on every unit before shipment.<\/p>\n<\/div>\n

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Two-Stage Bore Run Test<\/h3>\n

Each WPEKA undergoes the standard two-stage run test (noise \u226475 dB(A); oil seal integrity; torque within \u00b15% of rated) PLUS bore H7 plug gauge measurement and bore concentricity check. Both gear stages and the hollow bore are verified before shipment.<\/p>\n<\/div>\n

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Material Standards<\/h3>\n

Housing: FC25 cast iron (\u2265250 MPa). Both worm shafts: 20CrMnTi (\u226558 HRC). Wheel rims: ZCuSn10Pb1 tin-bronze. Custom bore diameters for non-standard shaft sizes available with material certification on request.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Why Choose Ever-power for WPEKA Gearboxes<\/h2>\n
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\"Ever-power<\/div>\n
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We supply WPEKA hollow shaft two-stage gearboxes to industrial mixer OEMs, heavy agitator equipment manufacturers, and mineral processing equipment builders in Italy, Mexico, Korea, Australia, and over 60 countries. Our in-house internal grinding capability ensures WPEKA hollow bores are machined to H7 tolerance in a single clamped operation \u2014 maintaining concentricity with the second-stage worm wheel shaft centreline for correct driven shaft alignment without field adjustment.<\/p>\n