{"id":775,"date":"2026-06-23T09:47:03","date_gmt":"2026-06-23T09:47:03","guid":{"rendered":"https:\/\/oldhamcoupling.net\/product\/sl260-industrial-oldham-coupling\/"},"modified":"2026-06-24T08:47:43","modified_gmt":"2026-06-24T08:47:43","slug":"sl260-industrial-oldham-coupling","status":"publish","type":"product","link":"https:\/\/oldhamcoupling.net\/it\/prodotto\/sl260-industrial-oldham-coupling\/","title":{"rendered":"SL260 Industrial Oldham Coupling"},"content":{"rendered":"
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SL260 Heavy-Industrial Cross-Slider Oldham Coupling \u2014 260 mm Cast-Iron Hub for Mining-Hoist, Cement-Feed and Pulp-Mill Drives<\/h2>\n

The SL260 industrial Oldham coupling<\/strong> brings the SL family to the upper end of the medium-heavy duty range. With 9 000 N\u00b7m rated torque, 260 mm hub OD, 100\u2013110 mm bore range, and 250 r\/min permissible speed, the SL260 transmits 170\u2013235 kW of continuous mechanical power. This is the duty class of mining-hoist auxiliary drives, large cement-plant feed-and-handling systems, the heaviest pulp-and-paper-mill section drives, and the larger-end metallurgical-process pumps. At this scale the coupling is unambiguously specified by senior engineering review, expected to remain in service for the design life of the host plant, and tracked as a strategic asset on the plant maintenance management system.<\/p>\n

One detail worth noting at the SL260: the hub-bore-diameter D\u2081 at 160 mm is the largest in the medium-power band of the SL family. This generous hub section provides the structural margin to support the M20 set-screw clamping force at the rated 9 000 N\u00b7m torque while preserving substantial fatigue margin against routine shock-load events. For taper-bushed mounting (the engineering-preferred specification at this size), the hub geometry accommodates the standard RINGFEDER 7012, Trantorque, or KTR-Clampex locking-assembly families without secondary machining \u2014 a small detail that meaningfully simplifies the integrator’s bill-of-materials specification.<\/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>\nSL260<\/td>\n<\/tr>\n
Nominal Torque (Tn)<\/td>\n9 000 N\u00b7m<\/td>\n<\/tr>\n
Permissible Speed (n)<\/td>\n250 r\/min<\/td>\n<\/tr>\n
Bore Range (d)<\/td>\n100 \u2013 110 mm<\/td>\n<\/tr>\n
Outside Diameter (D)<\/td>\n260 mm<\/td>\n<\/tr>\n
Hub Bore Diameter (D\u2081)<\/td>\n160 mm<\/td>\n<\/tr>\n
Overall Length (L)<\/td>\n190 mm<\/td>\n<\/tr>\n
Slider Plate Thickness (H)<\/td>\n33 mm<\/td>\n<\/tr>\n
Slider Clearance (S)<\/td>\n1.0 mm<\/td>\n<\/tr>\n
Moment of Inertia<\/td>\n2.0 kg\u00b7m\u00b2<\/td>\n<\/tr>\n
Mass<\/td>\n76 kg<\/td>\n<\/tr>\n
Radial Misalignment (\u0394y)<\/td>\n4.0 mm<\/td>\n<\/tr>\n
Angular Misalignment (\u0394\u03b1)<\/td>\n0.5\u00b0<\/td>\n<\/tr>\n
Axial Misalignment (\u0394x)<\/td>\n3.4 mm<\/td>\n<\/tr>\n
Shaft Engagement<\/td>\nKeyway + setscrew<\/td>\n<\/tr>\n
Lubrication<\/td>\nGrease (re-pack 6-monthly)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"SL260<\/p>\n

Materials<\/h3>\n
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QT500-7 Ductile-Iron Hubs (Standard)<\/h4>\n

At SL260 size, the QT500-7 ductile-iron hub variant is the documented standard, with HT250 grey iron available only for low-shock-load light-duty applications. The substantial hub mass (~35 kg per hub) reflects the engineered safety factor against the 9 000 N\u00b7m peak rating, with extended fracture-toughness margin for shock-load events typical of mining-hoist and crusher duty.<\/p>\n<\/p><\/div>\n

\n

Heavy Steel Slider Section<\/h4>\n

33 mm thick induction-hardened 45-steel cross-slider, or 40Cr alloy slider for reversal-duty deployments. At the SL260 size, the slider’s mass becomes a noticeable contribution to the total coupling inertia (2.0 kg\u00b7m\u00b2). For pulp-mill and reversal applications, the 40Cr alloy slider is the documented engineering preferred specification.<\/p>\n<\/p><\/div>\n

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Heavy-Duty Mounting Interface<\/h4>\n

H7-reamed hub bore with parallel keyway to GB\/T 1096. M20 set-screw for axial location. For mining-hoist, crusher, and cement-feed installations, taper-bushed mounting via standard locking-assembly families is the documented engineering best practice. The SL260 hub geometry accommodates RINGFEDER 7012, Trantorque, and KTR-Clampex families without secondary machining.<\/p>\n<\/p><\/div>\n<\/div>\n

Engineering Considerations for 170\u2013235 kW Duty<\/h3>\n

At the SL260’s power class, the coupling specification process typically involves a multi-discipline engineering team: mechanical engineering responsible for torque-and-misalignment matching, reliability engineering responsible for failure-mode analysis, plant maintenance management responsible for service-cycle planning, and procurement responsible for total-cost-of-ownership analysis. The SL260 succeeds in this competitive specification environment through architectural advantages that map onto each stakeholder’s concerns: generous misalignment envelope for mechanical engineering, predictable gradual failure mode for reliability engineering, field-serviceable wear parts for maintenance management, and decades-class service life for procurement TCO analysis.<\/p>\n

For mining-hoist applications specifically, the SL260 carries an additional architectural advantage. The cross-slider’s zero-backlash transmission eliminates the angular lash that gear couplings introduce \u2014 a meaningful safety-system consideration for hoist applications where position-control accuracy interacts with the protective-interlock system. Combined with the SL260’s gradual failure mode (no catastrophic-event failure mechanism), this makes the coupling a documented best practice for medium-scale hoist auxiliary drives in mining operations across multiple regulatory regimes.<\/p>\n

For SL family selection guidance across the medium-heavy industrial range, please consult our heavy industrial coupling engineering page<\/a>.<\/p>\n

\"SL260<\/p>\n

Industry Applications<\/h3>\n
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\u2692\ufe0f<\/span> Mining-Hoist Auxiliary Drives<\/h4>\n

Auxiliary drive lines on shaft-hoist and skip-hoist installations in underground and surface mining. Zero-backlash transmission supports position-control accuracy interaction with protective-interlock systems.<\/p>\n<\/p><\/div>\n

\n

\ufe0f<\/span> Cement-Plant Feed Systems<\/h4>\n

Apron-feeder, raw-material conveyor, and clinker-cooler drives on cement-production lines. Misalignment tolerance absorbs the cumulative misalignment of long bulk-handling conveyors.<\/p>\n<\/p><\/div>\n

\n

<\/span> Pulp-Mill Section Drives<\/h4>\n

Stock-pump, refiner-feed, and stuff-box drives on pulp-and-paper mills. QT500 hubs and 40Cr alloy slider survive the chemical-process ambient of pulp-mill operation.<\/p>\n<\/p><\/div>\n

\n

\ufe0f<\/span> Process-Plant Heavy Pumps<\/h4>\n

Coupling between drive motor and heavy-process centrifugal-pump shaft in petrochemical, fertiliser, and metallurgical industries. Thermal-growth tolerance addresses cold-start to operating-temperature transition.<\/p>\n<\/p><\/div>\n

\n

<\/span> Marine Cargo Handling<\/h4>\n

Cargo-hatch winch and crane-aux drives on bulk-carrier and general-cargo vessels. QT500 ductile-iron hubs and calcium-sulfonate grease address the saltwater-spray ambient.<\/p>\n<\/p><\/div>\n

\n

<\/span> Large Hydropower Auxiliary<\/h4>\n

Gate-actuator and intake-cleaning drive trains on 10\u201325 MW hydropower stations. Long-cycle reliability across the 30+ year design life of hydropower infrastructure.<\/p>\n<\/p><\/div>\n<\/div>\n

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

Quality & Documentation<\/h4>\n

SL260 production runs under ISO 9001:2015<\/strong>. Cast-iron melt-traceability per heat with chemical-composition certification. Documentation pack covers RoHS<\/strong>, REACH<\/strong>, and CE<\/strong> conformity. For mining customers, supplementary documentation covering the coupling’s role in hoist-system safety analysis is available. For hydropower customers, additional EN ISO 12944 corrosivity-class compatibility documentation is supplied.<\/p>\n

Customisation<\/h4>\n

Catalogue bore range 100\u2013110 mm; oversized variants up to 115 mm produced under engineering review. Imperial-bore variants (4″, 4-1\/8″, 4-1\/4″) supported for North American export markets. QT500 ductile-iron hub is the engineering recommended specification at this size. Taper-bushed mounting via standard locking-assembly families is documented and lead-time-stable.<\/p>\n

Heavy-Duty Aftermarket<\/h4>\n

SL260 slider plates and 40Cr alloy variants stocked for 2-business-day shipment. Mass per coupling 76 kg; sea-freight in heavy-duty reinforced crating standard. English-speaking engineering desk responds within 24 hours<\/strong>. For continuous-production and critical-asset customers, pre-negotiated emergency-replacement protocols are routinely offered with 5-working-day delivery guarantee.<\/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

Kyrgyzstan \u2014 Gold-Mining Operator<\/h4>\n

Used in:<\/em> Skip-hoist auxiliary drive coupling on an underground gold-mine shaft installation.<\/p>\n

Feedback:<\/em> “Hoist-auxiliary duty is unforgiving \u2014 protective interlocks impose strict zero-backlash requirements that disqualified our original gear-coupling spec. The SL260 with QT500 hubs and taper-bushed mounting has now passed 6 years of underground service with one scheduled slider replacement during a planned shaft overhaul. Reliability-engineering analysis confirms it as the lowest-risk specification we could have selected for this safety-critical application.”<\/p>\n<\/p><\/div>\n

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

Uzbekistan \u2014 Integrated Cement Producer<\/h4>\n

Used in:<\/em> Apron-feeder drive coupling on a 1.5 Mt\/y cement plant raw-material handling system.<\/p>\n

Feedback:<\/em> “Apron-feeder duty has continuous shock-load events from rock-feed onto the feeder. The SL260 with QT500 hubs and 40Cr alloy slider has now passed 7 years across 4 parallel feeder lines with one scheduled slider replacement per line. Maintenance crew describes this as the most predictable coupling in our entire plant \u2014 wear progression is gradual, inspection is straightforward, replacement is fast. Excellent specification.”<\/p>\n<\/p><\/div>\n

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

Turkmenistan \u2014 Natural-Gas Processing Facility<\/h4>\n

Used in:<\/em> Heavy compressor-driven feed-water pump drive on a gas-processing facility.<\/p>\n

Feedback:<\/em> “Continuous 24\/7 duty with ambient temperatures swinging from -25 \u00b0C winter to +50 \u00b0C summer. The SL260 with synthetic-grease specification has handled this for 5 years with one slider replacement during a planned plant turnaround. Knock one star only because the synthetic-grease specification requirements (Kl\u00fcber Asonic GHY) needed clearer callout in the original quotation documents \u2014 we missed the upgrade need on first order and had to re-specify.”<\/p>\n<\/p><\/div>\n<\/div>\n

Frequently Asked Questions<\/h3>\n
\nIs the SL260 suitable for hoist-safety system integration?<\/summary>\n

Yes. The cross-slider’s zero-backlash transmission eliminates the angular lash that gear couplings introduce, which is a documented best-practice consideration for hoist safety-interlock systems. For specific safety-integration assessments, please consult Ever-power engineering with the proposed system schematic; we can supply a documented compatibility statement for inclusion in the safety-case file.<\/p>\n<\/details>\n

\nWhat is the recommended starter coordination for the SL260?<\/summary>\n

For installations with the SL260 in the drive train, we strongly recommend VFD soft-start or fluid-coupling isolated start, limiting inrush torque to 1.5\u20132\u00d7 rated SL260 torque (13 500\u201318 000 N\u00b7m peak). Direct-on-line starting of large motors directly through the SL260 is technically permissible but reduces slider service life by 30\u201340 % through accumulated shock-load damage.<\/p>\n<\/details>\n

\nAre spare-parts emergency programmes available?<\/summary>\n

Yes. For continuous-production and critical-asset customers, pre-negotiated emergency-replacement protocols are routinely offered: 5-working-day delivery of replacement SL260 couplings or slider plates from confirmed PO, with air-freight logistics pre-arranged to the customer’s nominated hub. Programme terms are negotiated with the sales desk based on installed-base size and historical demand profile.<\/p>\n<\/details>\n

\nWhat documentation is supplied for safety-case files?<\/summary>\n

For safety-critical applications (mining-hoist, hydropower-gate, marine-anchor), Ever-power supplies a comprehensive documentation pack including: material certification per heat, dimensional inspection records, surface-hardness verification on slider variants, declarations of conformity to relevant standards, and a documented failure-mode and effects analysis (FMEA) for the cross-slider architecture. Pack contents can be tailored to specific safety-case file requirements on request.<\/p>\n<\/details>\n

\nHow does the SL260 handle extreme-ambient temperature swings?<\/summary>\n

For ambient temperatures swinging between -30 \u00b0C and +60 \u00b0C, specify a synthetic polyalphaolefin grease (e.g., Kl\u00fcber Asonic GHY 72-72) that maintains its viscosity across the entire temperature range. The cast-iron and steel material specifications themselves operate without de-rating across this temperature window. For continuous service below -30 \u00b0C or above +120 \u00b0C, please consult engineering for a documented temperature-cycle compatibility review.<\/p>\n<\/details>\n

Quote SL260 for Critical Heavy-Duty Drives<\/h3>\n

For mining-hoist, cement-feed, pulp-mill, and heavy process-plant applications in the 170\u2013235 kW power class, the SL260 is Ever-power’s senior-engineered specification for safety-critical and critical-path drive trains. Explore the wider SL series catalogue<\/a>, read about Ever-power’s critical-asset supply capability<\/a>, or move directly to a B2B enquiry below.<\/p>\n

\n Quote SL260 \u2192<\/a>\n<\/p>\n