Description
SL360 Heavy-Industrial Cross-Slider Oldham Coupling — 360 mm Cast-Iron Hub for Major Mill Main and Marine Propulsion Drives
The SL360 industrial Oldham coupling takes the SL family into the realm of major capital-equipment drives. With 32 500 N·m rated torque — a substantial jump from the 20 000 N·m SL340 below it — 360 mm hub OD, 160 mm shaft, and 100 r/min permissible speed, the SL360 transmits approximately 340 kW of continuous mechanical power. This duty class includes major minerals-processing mill main drives, large ship-propulsion auxiliary lines, primary cement-kiln main drives at major-plant capacity, and the heaviest end of metallurgical-process slow-speed equipment. At this size and torque rating, the SL360 is a major capital-equipment item in its own right, specified through formal engineering review and tracked as a strategic asset on the plant or vessel maintenance-management system across its entire service life.
The jump from 20 000 N·m (SL340) to 32 500 N·m (SL360) reflects an engineering reality of the heavy-mill and large-marine market: there is a substantial population of equipment designed around the 300+ kW slow-speed power envelope where the SL340’s torque margin would be inadequate but a larger SL400’s mass and cost would be unnecessary. The SL360 is precisely sized for this duty profile — a 25–35 % torque-reserve margin against typical host-equipment continuous ratings of 25–28 kN·m, combined with the substantial 6.4 mm parallel-misalignment envelope that absorbs the cumulative misalignment of large-equipment installations. The 258 kg coupling mass reflects the section-modulus required at this rating, with QT500/QT600 hub options sized to the engineering-preferred shock-load capacity.
Specifications
| Parameter | Value |
|---|---|
| Model | SL360 |
| Nominal Torque (Tn) | 32 500 N·m |
| Permissible Speed (n) | 100 r/min |
| Bore (d) | 160 mm |
| Outside Diameter (D) | 360 mm |
| Hub Bore Diameter (D₁) | 240 mm |
| Overall Length (L) | 280 mm |
| Slider Plate Thickness (H) | 48 mm |
| Slider Clearance (S) | 1.0 mm |
| Moment of Inertia | 19.2 kg·m² |
| Mass | 258 kg |
| Radial Misalignment (Δy) | 6.4 mm |
| Angular Misalignment (Δα) | 0.5° |
| Axial Misalignment (Δx) | 5.7 mm |
| Shaft Engagement | Taper-bushed standard |
| Lubrication | Grease (re-pack 4-monthly) |
Materials
QT500-7 / QT600-3 / Cast-Steel Hub Options
Catalogue standard is QT500-7 ductile cast iron; QT600-3 cast-steel variant is the engineering-preferred upgrade for primary minerals-mill and major-marine deployments. For exceptional shock-load applications (primary autogenous-mill main drives, large-vessel main-shaft auxiliaries), cast-steel ZG270-500 variant is documented and available under engineering review with 8-week lead time. Each hub at QT500 specification masses approximately 120 kg.
48 mm Hardened Steel Slider
48 mm thick induction-hardened 45-steel cross-slider standard; 40Cr alloyed-steel slider with HRC 55 surface for reversal-duty deployments. Hardfaced variant with localised tungsten-carbide deposit is offered for severe abrasive applications. Slider masses approximately 32 kg with pre-machined lifting-eyelet provisions standard for hoist-supported field service.
Heavy Taper-Bushed Mounting
Taper-bushed mounting via heavy-duty locking-assembly families (Trantorque GT-Heavy, RINGFEDER 7012 large-bore series, KTR-Clampex 200 series). The 160 mm bore plus 240 mm hub-bore-diameter envelope accommodates standard heavy-bore locking assemblies without secondary machining. Engineering-supplied installation drawings cover bush placement, torque sequence, and locking-assembly retention verification.
Engineering at the Major Mill / Marine Scale
The SL360 occupies a specific engineering niche between SL340 (20 000 N·m, primary-mill auxiliary) and SL400 (38 700 N·m, ship-propulsion-class auxiliary). Equipment in this niche shares three engineering characteristics: high steady-state torque with substantial routine shock-load events, very long expected service life (typically 25–30 years), and operational consequences of failure that include not just lost production but downstream equipment damage and multi-day restart sequences. The selection criterion at this scale is therefore dominated by failure-mode predictability and lifecycle-cost analysis over the full asset-ownership horizon.
The SL360 succeeds in this engineering frame through structural advantages that map onto each concern. QT500/QT600 hub material with engineered 3× safety factor against rated torque addresses shock-load endurance over decades. Gradual wear of the inspectable steel slider — rather than catastrophic failure of an energy-storing component — addresses failure-mode predictability. Field-replaceable slider plates that align with major plant or vessel overhaul cycles address maintenance-economics evaluation. And the 30-year part-availability commitment that Ever-power offers for slider plates and consumables addresses the spare-parts-supply question that often dominates major-equipment specification reviews at this scale.
For broader engineering discussion of major mill and marine-class coupling selection, see Ever-power’s major-equipment engineering portal.
Industry Applications
⛰️ Major Mineral-Mill Main Drives
Main-drive input couplings on major SAG and autogenous mills in primary minerals-concentration operations. Substantial misalignment envelope handles the large-mill-shell deflection profile under loaded operation.
Ship-Propulsion Auxiliary Lines
Major auxiliary drive lines on large commercial vessels — bow-thruster main, stern-thruster main, main-shaft brake and lock-mechanisms. QT600 cast-steel hubs resist saltwater ambient and absorb propulsion-system shock events.
Major Cement-Kiln Main
Drive coupling between motor and main reduction-input of large cement-kiln rotating-section drives in major-capacity plants. Misalignment tolerance handles kiln-shell thermal expansion across long burner-zone temperature gradients.
Major Steel-Plant Drives
Hot-strip-mill stand-drive auxiliary, continuous-caster main-cooling pump, and finishing-train main-auxiliary drives. Elevated-temperature ambient tolerance through synthetic-grease specification.
⚡ Major Power-Station Main
Main boiler-feed pump and main condenser-cooling pump drives on major thermal-power-station infrastructure. Long-cycle reliability across the 30+ year design life of power-plant assets.
⚓ Heavy Marine Cranes & Winches
Main slewing and luffing drives on major shipyard heavy-lift cranes and offshore-supply vessel anchor-handling winches. Substantial shock-load capacity addresses crane-indexing and anchor-deployment events.
Why Choose Ever-power
Quality & Compliance
SL360 production runs under ISO 9001:2015 with full melt-traceability per cast-iron, ductile-iron, and cast-steel heat. Documentation pack covers RoHS, REACH, CE conformity, comprehensive FMEA documentation, and 30-year fatigue-endurance analysis. For marine customers, supplementary Lloyd’s Register, DNV-GL, or ABS type-approval can be supported through engineering review. For mining customers, supplementary shock-load profile compatibility and SAG/AG-mill duty-cycle analysis is available.
Customisation
Catalogue bore 160 mm; custom-bore variants from 150 mm to 170 mm produced under engineering review with 4-week lead-time premium. QT500-7 standard, QT600-3 engineering-preferred, ZG270-500 cast-steel for ultra-aggressive applications. Heavy-bore taper-bushed mounting via standard locking-assembly families. Hardfaced slider variant for severe-abrasive deployments.
Major-Capital-Equipment Aftermarket
SL360 slider plates and alloy variants stocked for 2-business-day shipment. Mass per coupling 258 kg; sea-freight in heavy-duty welded-steel transport cradle with secondary shock-absorbing internal packaging. English-speaking engineering desk responds within 24 hours. 30-year part-availability commitment for slider plates and consumables — covering the full design-life of major capital-equipment installations.
Customer Reviews & Case Studies
★★★★★
Dominican Republic — Gold-Mining Operator
Used in: Primary SAG-mill main-drive coupling on a major gold-mining concentrator plant.
Feedback: “Specified the SL360 with QT600-3 cast-steel hubs after detailed reliability-engineering review against gear-coupling and disc-pack-spacer alternatives. Eight years of three-shift continuous duty with one slider replacement during a major mill reline shutdown. The 30-year part-availability commitment was a meaningful factor in our capital-equipment specification approval. Excellent senior-engineered specification across the entire service window.”
★★★★★
Jamaica — Bauxite-Refining Operation
Used in: Primary digester-mixer main-drive coupling on a bauxite-refining alumina plant.
Feedback: “Continuous-process duty with significant chemical-process ambient (caustic-soda exposure) and elevated temperatures. The SL360 with QT500 hubs, synthetic-grease specification, and IP54 sealed coupling guard has handled 6 years of continuous duty without unplanned events. Maintenance crew describes this as the most predictable coupling in the entire plant — wear profile is exactly as the engineering documentation predicted.”
★★★★☆
Honduras — Sugar & Ethanol Integrated Mill
Used in: Cane-shredder primary-drive coupling on a 6 000 t/d sugar-and-ethanol integrated mill.
Feedback: “Cane-shredder duty includes intermittent rock-and-foreign-object impact events that catastrophically fail most flexible-coupling architectures. The SL360 with QT600-3 cast-steel hubs and 40Cr alloy slider has now passed 7 years of seasonal duty with one slider replacement. Knock one star only because emergency-replacement protocol to our inland location during one urgent event took 8 working days — the protocol commits to 5 working days but our remote inland geography extended this. Otherwise outstanding.”
Frequently Asked Questions
Why does grease repack interval drop to 4 months at SL360 size?
At higher slider mass and substantial sliding-velocity at routine misalignment, grease degradation accelerates relative to smaller SL family members. The 4-month repack interval (versus 6 months for SL210–SL340) maintains the lubrication-film integrity that is essential for the substantial slider-face surface area at this size. With synthetic high-performance grease the interval can be extended to 6 months — please specify at order entry.
What does the 30-year part-availability commitment cover?
Ever-power commits to 30-year availability of replacement slider plates and consumables (clamp screws, grease-fitting hardware) for the SL360 from the production-launch date of the host customer’s major capital equipment. Complete-coupling availability is committed for 15 years; beyond that, Ever-power supplies engineering documentation supporting third-party replacement-coupling manufacture under licence. The commitment is documented in the standard customer-supply agreement.
Can the SL360 be type-approved for marine class?
Yes — through engineering review, Ever-power can support Lloyd’s Register, DNV-GL, ABS, or other marine-class type-approval applications for SL360 deployments in commercial-vessel installations. Documentation includes material certificates, dimensional inspection records, FMEA analysis, and shock-load performance verification. Type-approval lead time is typically 12 weeks beyond standard coupling delivery; cost depends on specific class-society fee schedule.
How is the SL360 transported internationally?
At 258 kg, sea-freight in heavy-duty welded-steel transport cradle is the standard logistics mode. Cradle masses approximately 65 kg empty; gross shipping mass is 323 kg. Internal packaging includes shock-absorbing foam and moisture-barrier wrapping. For consolidated multi-coupling shipments, palletised cradle arrangements are supported. Air-freight is available for emergency replacement at substantial cost premium and requires advance arrangement of ground-handling equipment at the destination.
Is integrated equipment-design support available for OEM partners?
Yes. For OEM partners specifying SL360 in major capital-equipment designs (mineral mills, marine vessels, power stations), Ever-power offers integrated design-support including coupling-housing CAD models, weight-and-balance reports for equipment FEA models, vibration-source contribution analysis for plant noise-and-vibration studies, and pre-installation alignment-procedure documentation. Support level scales with annual partnership volume; please consult sales for programme terms.
Quote SL360 for Major Capital-Equipment Drives
For major minerals-mill main, ship-propulsion auxiliary, major cement-kiln main, and major power-station-auxiliary applications in the 340 kW slow-speed band, the SL360 is Ever-power’s senior-engineered specification of choice. Browse the wider SL series catalogue, read about Ever-power’s major-capital-equipment supply capability, or move directly to a B2B enquiry below.
