{"id":795,"date":"2026-06-23T09:47:18","date_gmt":"2026-06-23T09:47:18","guid":{"rendered":"https:\/\/oldhamcoupling.net\/product\/wh9-light-industrial-oldham-coupling\/"},"modified":"2026-06-24T08:47:46","modified_gmt":"2026-06-24T08:47:46","slug":"wh9-light-industrial-oldham-coupling","status":"publish","type":"product","link":"https:\/\/oldhamcoupling.net\/fa\/product\/wh9-light-industrial-oldham-coupling\/","title":{"rendered":"WH9 Light-Industrial Oldham Coupling"},"content":{"rendered":"
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WH9 Heavy Upper-Class Cast-Iron Oldham Coupling \u2014 Large Crusher Auxiliary and Heavy Process Drives<\/h2>\n

The WH9 cast-iron Oldham coupling<\/strong> carries the WH family to its penultimate specification. With 3 550 N\u00b7m rated torque, 65\u201385 mm bore range, 85 kg mass, and 1 800 rpm permissible speed, the WH9 is sized for large aggregate-crusher auxiliaries, heavy agricultural harvester principal drives, large industrial process pump outputs, and the heavier general-plant equipment drives that populate the upper boundary of the light-industrial machinery class. At 85 kg, the WH9 requires hoist-supported installation with engineering planning for access and handling \u2014 this is no longer field-improvisation territory. The 85 mm maximum bore corresponds to the dominant motor output-shaft size in the 22\u201337 kW motor class that anchors the WH9’s principal application population.<\/p>\n

Positioning the WH9 in the broader coupling-selection landscape helps engineers navigate its appropriate application scope. At 3 550 N\u00b7m and 1 800 rpm, the WH9 competes with lower SL-family members in torque (SL130: 500 N\u00b7m \u2014 much lower; SL150: 800 N\u00b7m \u2014 still lower; SL170: 2 000 N\u00b7m \u2014 closer) while operating at 7\u00d7 the SL family’s maximum speed. This speed-versus-torque trade-off positions the WH9 as the cost-optimal specification for large equipment operating in the 500\u20131 800 rpm range \u2014 where SL-family members would be both far too slow and far too heavy for the application, and where the WH9’s combination of substantial torque, mid-speed envelope, and reasonable 85 kg mass provides the most economical specification available in the Oldham cross-slider architecture.<\/p>\n

Specifications<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u067e\u0627\u0631\u0627\u0645\u062a\u0631<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nWH9<\/td>\n<\/tr>\n
Nominal Torque (Tn)<\/td>\n3 550 N\u00b7m<\/td>\n<\/tr>\n
Permissible Speed (n)<\/td>\n1 800 rpm<\/td>\n<\/tr>\n
Bore Range (d)<\/td>\n65 \u2013 85 mm<\/td>\n<\/tr>\n
Mass<\/td>\n85 kg<\/td>\n<\/tr>\n
Radial Misalignment (\u0394y)<\/td>\n1.2 mm<\/td>\n<\/tr>\n
Angular Misalignment (\u0394\u03b1)<\/td>\n0.5\u00b0<\/td>\n<\/tr>\n
Axial Misalignment (\u0394x)<\/td>\n1.2 mm<\/td>\n<\/tr>\n
Hub Material<\/td>\nHT250 grey cast iron<\/td>\n<\/tr>\n
Slider Material<\/td>\nInduction-hardened steel<\/td>\n<\/tr>\n
Lubrication<\/td>\nGrease (6-monthly)<\/td>\n<\/tr>\n
Shaft Engagement<\/td>\nKeyway + setscrew (M16)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"WH9<\/p>\n

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

HT250 grey cast iron hubs with stress-relief annealing. At WH9’s 85 kg total mass, each hub is approximately 40 kg \u2014 hoist-supported installation is mandatory. Hub section is engineered to a 2\u00d7 safety factor against rated 3 550 N\u00b7m, with adequate margin against the intermittent 1.5\u00d7 shock events typical of crusher-auxiliary and large-harvester duty profiles.<\/p>\n<\/p><\/div>\n

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Heavy Slider<\/h4>\n

Induction-hardened carbon steel cross-slider, approximately 7\u20138 kg at WH9 size. Pre-machined lifting-strap anchor points on the slider are provided as standard for two-person hoist-supported field replacement. Annual slider inspection is recommended; replacement interval typically 5\u20137 years under standard light-industrial duty at this size class.<\/p>\n<\/p><\/div>\n

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M16 Setscrew Mounting<\/h4>\n

H7-reamed bore with parallel keyway to GB\/T 1096, M16 setscrew for axial location \u2014 the heaviest setscrew specification in the WH catalogue. Torque to 80 N\u00b7m standard; Loctite 243 mandatory for crusher-auxiliary, concrete-mixer, and heavy-impact applications. M16 setscrew provides 25\u201330 % more shaft-retention capability than WH8’s M14, appropriate for the WH9’s higher torque and shock-load profile.<\/p>\n<\/p><\/div>\n<\/div>\n

Cost Position in the Large-Equipment Market<\/h3>\n

At the WH9’s 3 550 N\u00b7m torque class, the competing coupling architectures include gear couplings (high torque density but requiring precision alignment, regular lubrication, and higher cost), disc-pack couplings (even higher cost, no field-serviceable wear part), and SL-family Oldham couplings at comparable bore ranges (much lower speed, heavier mass, higher cost). The WH9 is the most cost-economical specification in this torque class for applications where the 1 800 rpm speed limit is compatible with the operating profile.<\/p>\n

For large aggregate-crusher auxiliary drives operating in the 800\u20131 500 rpm range, the WH9 typically saves 40\u201350 % of coupling acquisition cost versus gear-coupling equivalents, eliminates the recurring alignment cost of disc-pack specifications, and provides a field-serviceable slider-replacement maintenance model that gear-coupling and disc-pack architectures cannot match. For large-harvester OEM designers, the WH9’s mass (85 kg) is at the practical limit of what the agricultural-equipment market can handle without specialist installation support, but its cost position relative to alternatives is compelling. See the full WH series range<\/a> for supporting selection data.<\/p>\n

\"WH9<\/p>\n

Industry Applications<\/h3>\n
\n
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\u26cf\ufe0f<\/span> Large Crusher Auxiliaries<\/h4>\n

Auxiliary drive couplings on large jaw, cone, and impact crushers in aggregate-quarrying and construction-site operations. HT250 hub and M16 setscrew provide robust shock-load reserve for crusher-auxiliary duty.<\/p>\n<\/p><\/div>\n

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<\/span> Heavy Agricultural Harvesters<\/h4>\n

Principal-shaft drives on large combine harvester threshers, large forage-harvester principal outputs, and large sugar-cane harvester main drives. High-speed WH9 envelope compatible with harvester PTO speed ranges.<\/p>\n<\/p><\/div>\n

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<\/span> Large Industrial Process Pumps<\/h4>\n

Main-drive coupling on large centrifugal and positive-displacement pumps in the 22\u201337 kW motor class for heavy industrial, municipal water-treatment, and process-plant applications.<\/p>\n<\/p><\/div>\n

\n

\u2699\ufe0f<\/span> Heavy Industrial Gear-Reducers<\/h4>\n

Output-shaft couplings on heavy-duty gear-reducer installations across general heavy industry, mining plant, and heavy process-equipment applications. Cost advantage versus gear-coupling alternatives.<\/p>\n<\/p><\/div>\n

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<\/span> Heavy General-Plant Equipment<\/h4>\n

Principal drives on heavy conveyor-drive heads, large compactor main drives, and heavy-plant principal-shaft installations in the 22\u201337 kW class at mid-range operating speeds.<\/p>\n<\/p><\/div>\n

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<\/span> Legacy Upper-Heavy Retrofit<\/h4>\n

Replacement coupling for legacy upper-heavy light-industrial specifications that have been discontinued or underperformed. Bore range covers dominant shaft sizes in the 22\u201337 kW motor class globally.<\/p>\n<\/p><\/div>\n<\/div>\n

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

WH9 production under \u0627\u06cc\u0632\u0648 \u06f9\u06f0\u06f0\u06f1:\u06f2\u06f0\u06f1\u06f5<\/strong>. Documentation covers RoHS<\/strong>, REACH<\/strong>, CE<\/strong>. HT250 material certification standard. Supplementary shock-load tolerance documentation for crusher and harvester OEM customers available.<\/p>\n

Cost-Competition<\/h4>\n

40\u201350 % acquisition-cost saving versus gear-coupling equivalents at this torque class. Hub-only and slider-only supply options for retrofit economics. Volume pricing for OEM customers and distributors supported.<\/p>\n

Aftermarket<\/h4>\n

WH9 sliders and hubs stocked for 5-business-day shipment (longer than smaller WH due to mass-class handling requirements). 85 kg requires dedicated freight. Engineering responds within 24 hours<\/strong>.<\/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

Sudan \u2014 Large Aggregate Quarrying<\/h4>\n

Used in:<\/em> Auxiliary drive coupling on a large cone crusher at a highway construction aggregate-supply operation.<\/p>\n

Feedback:<\/em> “High-ambient-temperature desert-quarry environment (55+ \u00b0C in peak summer). WH9 with calcium-sulfonate grease specification and sealed IP55 guard has delivered 4 years of three-shift operation without coupling failure. The 40 % cost saving versus our previous gear-coupling specification was critical for our project budget on this road-construction programme.”<\/p>\n<\/p><\/div>\n

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

South Sudan \u2014 Agricultural Mechanisation<\/h4>\n

Used in:<\/em> Principal-shaft drive coupling on large forage-harvester machines supporting commercial sorghum-silage operations.<\/p>\n

Feedback:<\/em> “Seasonal-duty operation with aggressive crop-debris ambient. WH9 has delivered 4 harvesting seasons without coupling failure across our harvester fleet. The 6-monthly grease schedule means we perform one repack at season start and one mid-season \u2014 a simple maintenance footprint for remote agricultural operations. Outstanding value specification.”<\/p>\n<\/p><\/div>\n

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

Chad \u2014 Municipal Water-Supply Pump Station<\/h4>\n

Used in:<\/em> Main-drive coupling on large centrifugal pumps at a regional water-supply infrastructure project.<\/p>\n

Feedback:<\/em> “Continuous 24\/7 water-supply pumping with high community-dependency. WH9 has performed without coupling-related incident for 4 years. Knock one star only because the 85 kg mass made initial installation challenging at our pump-station site without available hoist equipment \u2014 improvised handling added time. Strongly recommend budgeting appropriate handling equipment for WH9 initial installation. Operational performance has been outstanding.”<\/p>\n<\/p><\/div>\n<\/div>\n

Frequently Asked Questions<\/h3>\n
\nWhat sets the WH9 apart from gear couplings at this torque level?<\/summary>\n

Gear couplings at 3 550 N\u00b7m require precision laser-alignment (typically 0.05 mm parallel and 0.02\u00b0 angular), regular oil-lubrication changes, and provide no field-serviceable wear part. The WH9 requires only dial-gauge alignment (0.3 mm parallel adequate), semi-annual grease repack, and a field-replaceable steel slider as the sole wear part. Acquisition cost is typically 40\u201350 % lower. For applications operating below 1 800 rpm where gear-coupling precision is not required, the WH9 is clearly the more economical and maintainable specification.<\/p>\n<\/details>\n

\nWhat is the M16 setscrew torque specification?<\/summary>\n

The standard M16 setscrew torque is 80 N\u00b7m for class 10.9 hardware. For shock-load applications, apply Loctite 243 before final tightening. Re-check after the first 50 operating hours following initial installation. At M16 torque levels, calibrated torque-wrench installation is strongly recommended \u2014 the substantial tightening force required risks stripped threads or hub distortion if applied with non-calibrated tools.<\/p>\n<\/details>\n

\nWhat hoist capacity is required for WH9 installation?<\/summary>\n

Minimum 250 kg hoist capacity (to handle both hubs simultaneously with safety factor). Chain-block or trolley-mounted hoist with appropriate sling and shackle hardware rated for at least 200 kg dynamic load. Each hub at approximately 40 kg requires individual hoist support during shaft-mounting sequence. Ever-power installation documentation covers safe-slinging arrangements for both vertical and horizontal installation orientations.<\/p>\n<\/details>\n

\nIs the WH9 suitable for extreme-heat environments?<\/summary>\n

Yes, with appropriate grease specification. For continuous ambient above +60 \u00b0C (desert quarries, kiln-adjacent installations), specify a synthetic polyalphaolefin grease (PAO NLGI Grade 2 for above +80 \u00b0C ambient) rather than the standard mineral lithium-complex grade. The cast-iron hub material itself performs without derating to +200 \u00b0C; the grease specification is the limiting factor for elevated-temperature deployment.<\/p>\n<\/details>\n

\nWhen should I consider WH10 instead of WH9?<\/summary>\n

Consider WH10 when: (1) required torque exceeds 3 550 N\u00b7m; (2) bore range exceeds 85 mm; or (3) the application demands the highest torque available in the WH family. At the top end of large light-industrial applications \u2014 large process pumps above 30 kW, large crusher mains, and heavy plant drives requiring the maximum available WH-family specification \u2014 the WH10 is the appropriate selection.<\/p>\n<\/details>\n

Quote WH9 for Heavy Upper-Class Light-Industrial Drives<\/h3>\n

For large crusher auxiliary, heavy agricultural harvester, large industrial process pump, and heavy general-plant applications in the 3 550 N\u00b7m mid-speed class, the WH9 delivers compelling cost savings over gear-coupling alternatives. Browse the wider WH series catalogue<\/a>, read about Ever-power’s industrial-coupling supply<\/a>, or enquire directly below.<\/p>\n

\n Quote WH9 Now \u2192<\/a>\n<\/p>\n