{"id":782,"date":"2026-06-23T09:47:07","date_gmt":"2026-06-23T09:47:07","guid":{"rendered":"https:\/\/oldhamcoupling.net\/product\/sl460-industrial-oldham-coupling\/"},"modified":"2026-06-24T08:47:43","modified_gmt":"2026-06-24T08:47:43","slug":"sl460-industrial-oldham-coupling","status":"publish","type":"product","link":"https:\/\/oldhamcoupling.net\/nn\/product\/sl460-industrial-oldham-coupling\/","title":{"rendered":"SL460 Industrial Oldham Coupling"},"content":{"rendered":"
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SL460 Heavy-Industrial Cross-Slider Oldham Coupling \u2014 The Apex of the SL Family for Main Ship-Propulsion and Major Mine-Hoist Drives<\/h2>\n

The SL460 industrial Oldham coupling<\/strong> stands at the apex of the SL family \u2014 the largest, heaviest, and highest-torque cross-slider Oldham coupling in Ever-power’s standard catalogue. At 63 000 N\u00b7m rated torque (nearly twice the SL400 below it), 460 mm hub OD, single 200 mm shaft, 70 r\/min permissible speed, and 560 kg total mass, the SL460 transmits approximately 460 kW of continuous mechanical power in the very-ultra-slow-speed, very-very-high-torque envelope. This is the duty class of main ship-propulsion shaft installations, primary mine-hoist main drives at major underground mining operations, the largest tier of mineral-mill main drives, and the most demanding major-capital-equipment slow-speed drives. The SL460 is a major capital asset in its own right \u2014 specification involves multi-week engineering review, integration into the host equipment’s design documentation, and full lifecycle-cost analysis spanning 30\u201340 year operational horizons.<\/p>\n

The torque jump from 38 700 N\u00b7m (SL400) to 63 000 N\u00b7m (SL460) \u2014 approximately 63 % increase in a single catalogue step \u2014 reflects an engineering reality of major capital equipment: the discrete population of installations at the very top of the duty curve. There is no continuous tail of slightly-larger-than-SL400 equipment; rather, there is a step-discontinuity to the very largest mill main drives, main propulsion-shaft installations on the largest vessels, and primary hoist mains on the deepest underground operations. The SL460 is precisely sized for this discrete population \u2014 it is not an over-specified larger sibling to the SL400 but a different engineering proposition entirely, optimised for the strategic-asset role on the largest-scale industrial installations.<\/p>\n

Specifications<\/h3>\n
\n\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>\nSL460<\/td>\n<\/tr>\n
Nominal Torque (Tn)<\/td>\n63 000 N\u00b7m<\/td>\n<\/tr>\n
Permissible Speed (n)<\/td>\n70 r\/min<\/td>\n<\/tr>\n
Bore (d)<\/td>\n200 mm<\/td>\n<\/tr>\n
Outside Diameter (D)<\/td>\n460 mm<\/td>\n<\/tr>\n
Hub Bore Diameter (D\u2081)<\/td>\n300 mm<\/td>\n<\/tr>\n
Overall Length (L)<\/td>\n350 mm<\/td>\n<\/tr>\n
Slider Plate Thickness (H)<\/td>\n58 mm<\/td>\n<\/tr>\n
Slider Clearance (S)<\/td>\n1.0 mm<\/td>\n<\/tr>\n
Moment of Inertia<\/td>\n62.9 kg\u00b7m\u00b2<\/td>\n<\/tr>\n
Mass<\/td>\n560 kg<\/td>\n<\/tr>\n
Radial Misalignment (\u0394y)<\/td>\n8.0 mm<\/td>\n<\/tr>\n
Angular Misalignment (\u0394\u03b1)<\/td>\n0.5\u00b0<\/td>\n<\/tr>\n
Axial Misalignment (\u0394x)<\/td>\n7.2 mm<\/td>\n<\/tr>\n
Shaft Engagement<\/td>\nHeavy taper-bushed<\/td>\n<\/tr>\n
Lubrication<\/td>\nGrease (re-pack 4-monthly)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"SL460<\/p>\n

Materials<\/h3>\n
\n
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ZG270-500 Cast-Steel Hubs (Catalogue Standard)<\/h4>\n

At the SL460 size and rating, ZG270-500 cast-steel is the catalogue-standard hub specification \u2014 not an upgrade option. Each hub masses approximately 260 kg. The cast-steel matrix delivers tensile strength (\u2265500 MPa), fracture toughness, and fatigue-endurance margin that QT500\/QT600 ductile-iron alone cannot provide at this duty class. For exceptional safety-critical or aggressive shock-load applications (deep-shaft mine hoist, certain ship-class type-approvals), an upgrade to certified-melt forging-quality steel (35CrMo or 42CrMo4) is documented and available through specialised engineering review.<\/p>\n<\/p><\/div>\n

\n

58 mm Heavy-Duty Hardened Slider<\/h4>\n

58 mm thick \u2014 the heaviest in the SL family \u2014 induction-hardened 40Cr alloyed-steel cross-slider standard at this size class (45-steel is no longer the standard at this duty class). Slider masses approximately 65 kg with pre-machined heavy-duty lifting-eyelet provisions (M24 threaded). For severe abrasive deployments, hardfaced tungsten-carbide overlay variant is offered. For safety-critical hoist-main and ship-propulsion-main installations, 42CrMo4 fully heat-treated alloy slider with documented fatigue-endurance certification is the engineering-preferred specification.<\/p>\n<\/p><\/div>\n

\n

Heavy-Industrial Taper-Bush Mounting<\/h4>\n

Mounting via super-heavy-duty locking-assembly families designed for the 200 mm bore \/ 300 mm hub-bore-diameter envelope: Trantorque GT-Heavy 250 series, RINGFEDER 7012 super-heavy-bore, KTR-Clampex 250\/300 series. Engineering-supplied installation packets include detailed torque-sequence diagrams, locking-bolt-tightening cycles with intermediate verification steps, and post-installation strain-gauge verification protocols for safety-critical applications. All locking-bolt hardware is certified-traceability standard.<\/p>\n<\/p><\/div>\n<\/div>\n

The Apex: Engineering for the Largest Industrial Drives<\/h3>\n

The SL460 occupies a unique position in the Oldham-coupling design space. At 63 000 N\u00b7m and 560 kg, it competes directly with major gear couplings, large diaphragm couplings, and major flexible-disc-pack designs at the very top of the industrial-coupling market. None of these competitors offer the SL460’s 8.0 mm parallel-misalignment envelope, its field-replaceable slider architecture, or its 30-year part-availability commitment. None offer the gradual, inspectable, predictable failure mode that the cross-slider architecture has carried consistently from the smallest SL family member to this apex. And none offer the design-margin documentation, FMEA framework, and engineering-support depth that Ever-power has built around the SL460 specifically for major capital-equipment installations.<\/p>\n

For the integrator specifying a coupling at this scale, the SL460 represents the convergence of architectural decisions that have proven themselves across the entire SL family. The cross-slider mechanical design absorbs misalignment without storing elastic-strain energy, eliminating the catastrophic-failure mode that disc-pack and elastomer-spider architectures cannot escape. The cast-steel hub material delivers the shock-load endurance margin that grey-iron and ductile-iron cannot match at this rating. The 4-monthly grease-repack schedule maintains lubrication-film integrity at the substantial slider sliding velocities of routine misalignment operation. And the 30-year part-availability commitment matches the design-life expectation of the major capital equipment in which the SL460 is typically deployed. The combined architectural-and-commercial offering has kept the SL460 on equipment specifications across the most demanding installations in the global industrial market.<\/p>\n

For broader engineering discussion of strategic-asset coupling specification at this scale, see Ever-power’s senior strategic-asset engineering portal<\/a>.<\/p>\n

\"SL460<\/p>\n

Industry Applications<\/h3>\n
\n
\n

<\/span> Main Ship-Propulsion Shaft<\/h4>\n

Main propulsion-shaft installations on large commercial vessels \u2014 typically inserted in the intermediate-shaft section between the gearbox output and the propeller-shaft section. Marine type-approval (LR, DNV, ABS, BV, CCS) supported through engineering review.<\/p>\n<\/p><\/div>\n

\n

\u26cf\ufe0f<\/span> Major Mine-Hoist Main Drives<\/h4>\n

Primary hoist main-drive couplings on deep-shaft underground mining installations \u2014 gold, copper, platinum, uranium, and other major-metal operations. Zero-backlash transmission and gradual failure mode support stringent safety-case requirements.<\/p>\n<\/p><\/div>\n

\n

<\/span> Largest Cement-Kiln Main<\/h4>\n

Main-drive coupling on the largest tier of cement-kiln rotating-section drives \u2014 large dry-process kilns at the upper end of plant-capacity envelope. Substantial misalignment tolerance absorbs full kiln-shell thermal-expansion profile.<\/p>\n<\/p><\/div>\n

\n

\u26f0\ufe0f<\/span> Largest Minerals-Mill Main<\/h4>\n

Main-drive couplings on the largest SAG and autogenous-mill installations in primary minerals-processing \u2014 top-tier major-capacity mills at the upper end of installed-base capacity globally.<\/p>\n<\/p><\/div>\n

\n

<\/span> Major Hydropower Main<\/h4>\n

Major main-drive applications on large hydropower-station main-machinery installations \u2014 gate-actuator main, main-intake auxiliary, and large diversion-flow control drives. 50-year design-life alignment with major-hydro asset profile.<\/p>\n<\/p><\/div>\n

\n

\u26a1<\/span> Major Power-Generation Main<\/h4>\n

Main boiler-feed pump and major condenser-cooling pump applications on major thermal-power-station and combined-cycle plant infrastructure at the top of plant-capacity envelope. 30+ year design life with infrequent overhaul access.<\/p>\n<\/p><\/div>\n<\/div>\n

Why Choose Ever-power<\/h3>\n
\n

Quality & Compliance<\/h4>\n

SL460 production runs under ISO 9001:2015<\/strong> with full cast-steel melt-traceability and forged-component certification where applicable. Documentation pack covers RoHS<\/strong>, REACH<\/strong>, CE<\/strong> conformity, comprehensive FMEA documentation, 30\u201350 year fatigue-endurance analysis, shock-load profile compatibility statements, and material-property certification per heat. Marine type-approval support for all major class societies. Mining safety-case integration tailored to regulatory regime. Hydropower industry-specific compliance documentation for major-utility customers.<\/p>\n

Customisation<\/h4>\n

Catalogue bore 200 mm; custom-bore variants from 190 mm to 215 mm produced under engineering review with 8-week lead time. ZG270-500 cast-steel standard; 35CrMo or 42CrMo4 forging-quality variants for safety-critical applications. 42CrMo4 fully heat-treated alloy-slider variant with documented fatigue certification. Heavy-bore taper-bushed mounting via certified locking-assembly families. Hardfaced tungsten-carbide slider variant for severe abrasive environments. Engineering-led custom-design for non-catalogue bore-and-misalignment combinations on enquiry.<\/p>\n

Apex Strategic-Asset Aftermarket<\/h4>\n

SL460 slider plates and alloy variants stocked for 5-business-day shipment (longer than smaller couplings owing to substantial slider mass and specialised heat-treatment requirement). Mass per coupling 560 kg; sea-freight in custom-fabricated welded-steel transport cradle with multi-layer shock-absorbing internal packaging. English-speaking engineering desk responds within 24 hours<\/strong>. 30-year part-availability commitment for slider plates and consumables. On-site engineering supervision available for all major installations.<\/p>\n<\/div>\n

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

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

Suriname \u2014 Bauxite-Mining Operation<\/h4>\n

Used in:<\/em> Primary minerals-mill main-drive coupling on a major bauxite-mining concentrator complex.<\/p>\n

Feedback:<\/em> “Specified the SL460 with ZG270-500 cast-steel hubs and 42CrMo4 heat-treated alloy slider after the most rigorous engineering qualification we have ever conducted on a coupling specification. Ten years of three-shift continuous duty without unplanned events. The 30-year part-availability commitment was the single most important factor in our capital-equipment specification approval. Best major-capital-asset coupling decision we have made on this site.”<\/p>\n<\/p><\/div>\n

\n

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

Iraq \u2014 Major Cement-Production Facility<\/h4>\n

Used in:<\/em> Major cement-kiln main-drive coupling on a 3.5 Mt\/y dry-process cement plant.<\/p>\n

Feedback:<\/em> “Extreme-ambient operation (recurring 55+ \u00b0C summer days) and continuous-production duty at full plant capacity. The SL460 with ZG270-500 cast-steel hubs, synthetic high-temperature grease, and IP54 sealed coupling guard has handled 7 years of three-shift production without unplanned events. Kiln-section design relied on the documented 30-year fatigue-endurance analysis to qualify the coupling against our extended plant design-life specification. Excellent strategic-asset specification decision.”<\/p>\n<\/p><\/div>\n

\n

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

Yemen \u2014 Major Port-Terminal Reclaimer<\/h4>\n

Used in:<\/em> Main slewing-drive coupling on a major bulk-cargo port terminal reclaimer machine.<\/p>\n

Feedback:<\/em> “Coastal-salt ambient combined with continuous heavy-cargo duty had been the design challenge for our terminal expansion. The SL460 with cast-steel hubs, hardfaced slider, and sealed coupling guard has handled 5 years of three-shift duty without unplanned events. Knock one star only because the initial transport logistics for the 560 kg coupling to our specific port location required significant pre-planning \u2014 engineering supported us through the logistics-coordination process but it consumed substantial pre-installation calendar time. Operationally outstanding.”<\/p>\n<\/p><\/div>\n<\/div>\n

Frequently Asked Questions<\/h3>\n
\nWhy is permissible speed only 70 r\/min?<\/summary>\n

At 460 mm OD, even 80 r\/min would produce outer-rim sliding velocity of 1.93 m\/s \u2014 at the upper edge of the optimal envelope for grease-lubricated metallic interfaces in continuous-production duty. The 70 r\/min limit reduces this to 1.7 m\/s, maintaining lubrication-film integrity over multi-decade service intervals. For applications requiring sub-rated speeds (typically 40\u201370 r\/min for major mill and propulsion-shaft installations), the SL460 operates at full design margin throughout its envelope.<\/p>\n<\/details>\n

\nWhat is the documented design life and fatigue analysis horizon?<\/summary>\n

Documented design life for the SL460 in typical major capital-equipment continuous-production duty is 30+ years for the cast-steel hub section, with slider replacement at 12\u201315 year intervals during major plant or vessel overhauls. Fatigue analysis is conducted to 50-year horizon for installations where regulatory or commercial requirements specify extended design-life. Field service track record includes installations now passing 25+ years of continuous duty with original cast-steel hubs and 2\u20133 slider replacements.<\/p>\n<\/details>\n

\nHow is the SL460 handled and shipped at 560 kg?<\/summary>\n

Shipping is in a custom-fabricated welded-steel transport cradle with multi-layer shock-absorbing internal packaging. Cradle masses approximately 90 kg empty; gross shipping mass 650 kg. Installation requires 5-ton or larger overhead-crane capacity, with each hub at 260 kg requiring substantial hoist support during sub-assembly. Pre-machined heavy-duty lifting-eyelet provisions (M24 threaded) on both hub-faces and slider plate are standard. Installation typically requires a 2-day commissioning window for a competent crew with engineering supervision.<\/p>\n<\/details>\n

\nIs on-site engineering supervision included with the SL460?<\/summary>\n

For the SL460 specifically, on-site engineering supervision during installation and initial commissioning is offered as standard inclusion for first-time customers and for installations in safety-critical applications (mine-hoist main, ship-propulsion main). For subsequent SL460 deployments at the same customer site, supervision can be omitted at the customer’s option subject to documented in-house competency. Supervision includes installation oversight, post-installation strain-gauge verification (for safety-critical applications), and equipment-handover documentation.<\/p>\n<\/details>\n

\nWhat is the production lead time for a new SL460 order?<\/summary>\n

Standard SL460 production lead time is 14 weeks from confirmed PO, reflecting the substantial cast-steel hub production cycle and specialised heat-treatment requirements. For customers requiring expedited delivery (typically major-vessel mid-life refit, emergency mill-main replacement), expedited production at 9-week lead time is available at appropriate cost premium subject to production-schedule availability. Marine type-approval, when required, adds 12\u201316 weeks to the standard lead time.<\/p>\n<\/details>\n

Quote SL460 \u2014 The Apex of the SL Family<\/h3>\n

For main ship-propulsion shaft, primary mine-hoist main, major-tier cement-kiln main, major minerals-mill main, and major hydropower main applications in the 460 kW ultra-slow-speed power class, the SL460 is the apex strategic-asset specification of the SL family. Browse the wider SL series catalogue<\/a>, read about Ever-power’s apex strategic-asset capability<\/a>, or move directly to a major-capital-equipment enquiry below.<\/p>\n

\n Quote SL460 Now \u2192<\/a>\n<\/p>\n