{"id":788,"date":"2026-06-23T09:47:13","date_gmt":"2026-06-23T09:47:13","guid":{"rendered":"https:\/\/oldhamcoupling.net\/product\/wh2-light-industrial-oldham-coupling\/"},"modified":"2026-06-24T08:47:44","modified_gmt":"2026-06-24T08:47:44","slug":"wh2-light-industrial-oldham-coupling","status":"publish","type":"product","link":"https:\/\/oldhamcoupling.net\/ms\/product\/wh2-light-industrial-oldham-coupling\/","title":{"rendered":"WH2 Light-Industrial Oldham Coupling"},"content":{"rendered":"
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WH2 Light-Industrial Cast-Iron Oldham Coupling \u2014 Hand-Tool Factory and Bench-Grinder Drive Joint<\/h2>\n

The WH2 light-industrial Oldham coupling<\/strong> sits at the productive heart of the WH family \u2014 the size class where cast-iron coupling architecture delivers maximum economic value across the broadest range of light-industrial application contexts. With 31.5 N\u00b7m rated torque, 12\u201318 mm bore range, and 8 200 rpm permissible speed, the WH2 is sized for bench-grinder spindle drives, hand-tool factory production lines, small woodworking machinery, small ceramic-process machinery, and the substantial population of light-industrial equipment in the 1.5\u20133 kW continuous-power band. The WH2’s combination of moderate torque capacity, substantial RPM envelope, and cost-economic cast-iron architecture has kept it as a workhorse specification in the light-industrial market for multiple equipment generations.<\/p>\n

For light-industrial OEM equipment designers, the WH2 specification offers a particularly attractive lifecycle-cost proposition. Acquisition cost is meaningfully lower than precision-aluminum couplings of equivalent torque rating. Installation procedure is straightforward \u2014 keyway-and-setscrew mounting requires no specialised hardware or torque-sequence operations. Maintenance touch-points are minimal \u2014 annual grease repack is the only routine intervention. And replacement-part availability is reliable across decade-class service horizons. The combined value proposition has kept the WH2 on equipment specifications across multiple equipment generations of bench grinders, hand-tool production lines, and light-industrial machinery.<\/p>\n

Specifications<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nWH2<\/td>\n<\/tr>\n
Nominal Torque (Tn)<\/td>\n31.5 N\u00b7m<\/td>\n<\/tr>\n
Permissible Speed (n)<\/td>\n8 200 rpm<\/td>\n<\/tr>\n
Bore Range (d)<\/td>\n12 \u2013 18 mm<\/td>\n<\/tr>\n
Outside Diameter (D)<\/td>\n58 mm<\/td>\n<\/tr>\n
Overall Length (L)<\/td>\n68 mm<\/td>\n<\/tr>\n
Slider Material<\/td>\nHardened 45-steel HRC 45-55<\/td>\n<\/tr>\n
Hub Material<\/td>\nHT250 cast iron<\/td>\n<\/tr>\n
Radial Misalignment (\u0394y)<\/td>\n0.5 mm<\/td>\n<\/tr>\n
Angular Misalignment (\u0394\u03b1)<\/td>\n0.5\u00b0<\/td>\n<\/tr>\n
Axial Misalignment (\u0394x)<\/td>\n0.4 mm<\/td>\n<\/tr>\n
Mass<\/td>\n1.5 kg<\/td>\n<\/tr>\n
Shaft Engagement<\/td>\nKeyway + setscrew<\/td>\n<\/tr>\n
Lubrication<\/td>\nGrease (re-pack annually)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"WH2<\/p>\n

Materials<\/h3>\n
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HT250 Grey Cast-Iron Hubs<\/h4>\n

Hubs are sand-cast in HT250 grey iron with full stress-relief annealing before machining operations. The cast-iron section delivers cost-economic strength at the WH2’s torque rating while providing the inherent vibration-damping properties that improve light-industrial equipment running characteristics. Hub section thickness is engineered with a 4\u00d7 safety factor against rated peak torque, providing substantial margin for routine 1.5\u20132\u00d7 shock-load events.<\/p>\n<\/p><\/div>\n

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Hardened Steel Cross-Slider<\/h4>\n

The cross-slider is precision-machined from 45-steel medium-carbon bar, induction-hardened on all four sliding-wear faces to HRC 45\u201355 surface hardness. The substantial slider section delivers essentially unlimited fatigue life under steady-state torque, with replacement triggered by gradual wear of the sliding surfaces. For applications with aggressive ambient (foundry dust, woodworking dust), corrosion-resistant slider variants in passivated stainless steel or zinc-electroplated 45-steel are available through engineering review.<\/p>\n<\/p><\/div>\n

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Standard Light-Industrial Mounting<\/h4>\n

H7-reamed hub bore with parallel keyway to GB\/T 1096. M6 set-screw for axial location. The cast-iron section’s excellent machinability accommodates custom-bore variants without specialised tooling, making the WH2 particularly suitable for retrofit applications where legacy equipment has non-standard shaft sizes. Imperial-bore variants supported for export-market installations.<\/p>\n<\/p><\/div>\n<\/div>\n

The Engineering Profile of Light-Industrial Production Equipment<\/h3>\n

Light-industrial production equipment \u2014 hand-tool factories, woodworking machinery, light ceramic-process equipment, and similar manufacturing-economy installations \u2014 operates within a specific engineering envelope. Production utilisation is typically high but not continuous (8\u201316 hours per day, 5\u20136 days per week). Maintenance windows are predictable but constrained. Equipment design-life expectation is 15\u201325 years. Total-cost-of-ownership analysis is dominated by acquisition cost and maintenance-labour cost, with parts-cost a secondary factor. Coupling specifications must balance reliable steady-state operation against cost-economic constraints, with substantial misalignment tolerance to accommodate the realistic frame-fabrication tolerance of light-industrial OEM equipment.<\/p>\n

The WH2’s design profile maps directly onto this engineering envelope. Cast-iron hub material delivers cost economics that align with light-industrial OEM acquisition-cost targets. The 0.5 mm parallel-misalignment envelope absorbs realistic light-industrial frame tolerance without requiring precision-machining specifications. The keyway-and-setscrew mounting requires no specialised installation tooling. Annual grease-repack intervals align with light-industrial maintenance-cycle scheduling. And the documented 15\u201320 year hub service life matches the design-life expectation of light-industrial host equipment. The combined design profile has kept the WH2 on equipment specifications across multiple OEM brand portfolios and across multiple equipment-generation cycles in the light-industrial market.<\/p>\n

For broader engineering background on light-industrial coupling specification, see Ever-power’s light-industrial coupling resources<\/a>.<\/p>\n

\"WH2<\/p>\n

Industry Applications<\/h3>\n
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\ufe0f<\/span> Bench-Grinder Spindle Drives<\/h4>\n

Drive couplings on bench-grinder spindles, surface-grinder auxiliary drives, and small surface-finishing equipment in industrial maintenance workshops. Vibration damping supports surface-finish accuracy.<\/p>\n<\/p><\/div>\n

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<\/span> Hand-Tool Factory Lines<\/h4>\n

Production-line drive couplings on hand-tool manufacturing \u2014 pliers production, screwdriver-handle moulding, and small hand-tool assembly machinery. Cost-economic specification for high-volume manufacturing.<\/p>\n<\/p><\/div>\n

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<\/span> Small Woodworking Machinery<\/h4>\n

Drive couplings on small woodworking machinery \u2014 table-saw spindle drives, small planer-thicknesser drives, and bench-mounted band-saw spindles. Cast-iron section tolerates the dust-rich woodworking ambient.<\/p>\n<\/p><\/div>\n

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<\/span> Light Ceramic-Process Equipment<\/h4>\n

Drive couplings on small ceramic-shaping equipment \u2014 extruder auxiliaries, glaze-mixing drives, and kiln-loading conveyor drives. Cast-iron material tolerates the thermal-cycling ambient of ceramic-process facilities.<\/p>\n<\/p><\/div>\n

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<\/span> Small Fan & Blower Drives<\/h4>\n

Drive couplings on small industrial fans, light-commercial HVAC fan drives, and small dust-extractor blowers. Continuous-duty operation with steady-state torque profile.<\/p>\n<\/p><\/div>\n

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<\/span> Legacy-Equipment Retrofit<\/h4>\n

Replacement-coupling specifications for legacy light-industrial equipment \u2014 discontinued bench-grinder spindles, hand-tool production-line drives, and small machinery installations where original OEM coupling specifications are no longer commercially supported.<\/p>\n<\/p><\/div>\n<\/div>\n

Why Choose Ever-power<\/h3>\n
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Quality & Compliance<\/h4>\n

WH2 production runs under ISO 9001:2015<\/strong>. Cast-iron melt traceability per heat. Documentation pack covers RoHS<\/strong>, REACH<\/strong>, and CE<\/strong> conformity. For light-industrial OEM customers, supplementary documentation supporting ISO 12100 safety-of-machinery integration is available. For retrofit applications, dimensional-compatibility statements for common discontinued coupling specifications can be supplied on engineering enquiry.<\/p>\n

Customisation<\/h4>\n

Catalogue bore range 12\u201318 mm; custom-bore variants from 10 mm to 20 mm produced under engineering review with 1-week lead time. Imperial-bore variants (1\/2″, 5\/8″, 3\/4″) supported. Stainless-steel slider variant for corrosive-ambient installations. ISO 1940 G2.5 precision-balance variant for operation above 6 000 rpm.<\/p>\n

Aftermarket<\/h4>\n

WH2 slider plates stocked for 1-business-day shipment. 1.5 kg mass per coupling supports air-freight standard. English-speaking engineering desk responds within 24 hours<\/strong>. Light-industrial customers with multi-machine fleets are supported through volume-pricing frameworks and customer-nominated buffer-stock arrangements.<\/p>\n<\/div>\n

\"Ever-power<\/p>\n

Customer Reviews & Case Studies<\/h3>\n
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\u2605\u2605\u2605\u2605\u2605<\/p>\n

Myanmar \u2014 Hand-Tool Manufacturing Operator<\/h4>\n

Used in:<\/em> Production-line drive coupling on a pliers-manufacturing automated assembly line.<\/p>\n

Feedback:<\/em> “Continuous two-shift production duty across approximately 30 line installations. Specified the WH2 as a cost-economic alternative to the original OEM precision-coupling specification \u2014 acquisition cost saving meaningful for our production-economics target. Six years of production duty without coupling-attributable downtime. Slider-replacement intervals align naturally with our annual maintenance-cycle scheduling. Excellent cost-economic specification for our manufacturing-line application.”<\/p>\n<\/p><\/div>\n

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\u2605\u2605\u2605\u2605\u2605<\/p>\n

Laos \u2014 Small Woodworking Equipment Manufacturer<\/h4>\n

Used in:<\/em> Spindle-drive coupling on bench-mounted woodworking equipment for furniture-production export.<\/p>\n

Feedback:<\/em> “Dust-rich woodworking ambient had been challenging for our previous spider-coupling specification \u2014 typical service interval was 18 months due to dust contamination of the elastomer. The WH2’s cast-iron section tolerates dust ingress without performance degradation. Five years of production duty across approximately 200 woodworking units shipped without warranty-attributable coupling issues. Specification standardised across our equipment portfolio.”<\/p>\n<\/p><\/div>\n

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\u2605\u2605\u2605\u2605\u2606<\/p>\n

Cambodia \u2014 Light-Industrial Maintenance Workshop<\/h4>\n

Used in:<\/em> Bench-grinder spindle-drive coupling on multi-machine industrial maintenance workshop.<\/p>\n

Feedback:<\/em> “Maintenance-workshop environment includes substantial vibration and frequent equipment relocation. The WH2 with stainless-steel slider variant has handled 4 years of duty across approximately 12 bench-grinder installations without coupling-related issues. Knock one star only because the original cataloguing documentation for the stainless-slider option could be more prominent \u2014 engineering response on this variant was excellent but the option discovery took an extra communication round. Otherwise excellent.”<\/p>\n<\/p><\/div>\n<\/div>\n

Frequently Asked Questions<\/h3>\n
\nHow does WH2 compare in cost to a precision EP6-50 coupling?<\/summary>\n

The EP6-50 precision-aluminum coupling at the equivalent torque and bore range typically carries approximately 40\u201360 % higher unit cost than the WH2 cast-iron specification. For light-industrial applications where the cost differential matters and the higher precision-aluminum specifications are not essential, the WH2 wins on lifecycle-cost analysis. For applications where shaft preservation, sub-arcminute positioning accuracy, or cleanroom compatibility are required, the EP6 family remains the engineering-preferred specification.<\/p>\n<\/details>\n

\nIs the WH2 suitable for dust-rich woodworking or grinding ambient?<\/summary>\n

Yes. The cast-iron section tolerates dust ingress at the sliding interfaces without performance degradation \u2014 the metallic interface is mechanically robust against dust contamination in a way that elastomer-spider couplings are not. For installations with particularly aggressive dust ambient (foundry dust, cement-dust, fine ceramic dust), sealed coupling-guard installation is the engineering best practice, restricting dust access to the slider interfaces while maintaining the WH2’s standard catalogue performance.<\/p>\n<\/details>\n

\nWhat is the recommended commissioning routine?<\/summary>\n

After initial WH2 installation and the first 50 operating hours, re-check the M6 set-screw torque to 12 N\u00b7m. The cast-iron hub will have completed initial seating on the shaft by this point, and a small re-tightening pass eliminates any settling-induced slack. Subsequent annual grease-repack intervals should include a set-screw torque check; in routine service no re-tightening is typically required beyond the initial 50-hour check.<\/p>\n<\/details>\n

\nAre volume-pricing frameworks available?<\/summary>\n

Yes. For light-industrial OEM customers with annual demand above 100 units, volume-pricing frameworks with predictable annual pricing are routinely offered. For larger OEM customers (above 500 units annually) and multi-machine fleet operators, customer-nominated buffer-stock arrangements at 3PL warehouses can be set up with 24-hour replenishment SLAs. Programme terms negotiated with sales desk based on annual demand profile.<\/p>\n<\/details>\n

\nWhat is the maximum continuous operating temperature?<\/summary>\n

The standard WH2 catalogue specification supports continuous operating temperatures up to +80 \u00b0C without de-rating. For ambient temperatures between +80 \u00b0C and +120 \u00b0C (typical of certain ceramic-process and foundry installations), apply a 10 % torque de-rating and specify synthetic polyalphaolefin grease (e.g., Kl\u00fcber Asonic GHY). Above +120 \u00b0C continuous operation, please consult engineering for a documented temperature-compatibility review.<\/p>\n<\/details>\n

Quote WH2 for Light-Industrial Production Drives<\/h3>\n

For bench-grinder spindle, hand-tool factory, small woodworking machinery, light ceramic-process, small fan\/blower, and legacy-equipment retrofit applications, the WH2 is Ever-power’s preferred cost-economic specification for light-industrial production duty. Browse the wider WH series catalogue<\/a>, read about Ever-power’s light-industrial supply capability<\/a>, or move directly to a B2B enquiry below.<\/p>\n

\n Quote WH2 \u2192<\/a>\n<\/p>\n