Description
SL100 Industrial Cross-Slider Oldham Coupling — 110 mm Cast-Iron Hub Joint for Mid-Range Process Drives
The SL100 industrial Oldham coupling moves the SL family decisively into mid-range process-industry duty. At 500 N·m rated torque, 110 mm hub OD, 36–40 mm bore options, and 250 r/min permissible speed, the SL100 sits in the band where the host motor is typically a 7.5–13 kW industrial squirrel-cage induction unit and the driven load is a mid-sized centrifugal pump, a small process mixer, a feed-mill blower, or a moderate conveyor-head drive. This is the heart of the day-to-day industrial-coupling market — millions of these units operate around the world at any given moment, transmitting torque between motor and pump in pump-houses, processing plants, and material-handling installations of every description.
The SL100’s role in this market is anchored by a simple economic argument: at 5–13 kW continuous, an unplanned coupling failure typically costs more in production downtime than the entire purchase price of the coupling several times over. The selection criterion is therefore reliability per dollar over a 10-year ownership horizon, and on that criterion the SL100 has proven itself across half a century of industrial service. Cast-iron hubs outlast the motor and pump frames. Slider plates wear predictably and replace in field service in under one shift. The grease lubrication routine is so simple that maintenance crews rarely skip it. And the architectural advantages — zero backlash, 1.4 mm parallel-offset tolerance, decoupled motor-bearing side-loads — are simply absent from competing technologies at this price point.
Specifications
| Parameter | Value |
|---|---|
| Model | SL100 |
| Nominal Torque (Tn) | 500 N·m |
| Permissible Speed (n) | 250 r/min |
| Bore Range (d) | 36 – 40 mm |
| Outside Diameter (D) | 110 mm |
| Hub Bore Diameter (D₁) | 60 mm |
| Overall Length (L) | 70 mm |
| Slider Plate Thickness (H) | 19 mm |
| Slider Clearance (S) | 0.5 mm |
| Moment of Inertia | 0.026 kg·m² |
| Mass | 5.5 kg |
| Radial Misalignment (Δy) | 1.4 mm |
| Angular Misalignment (Δα) | 0.5° |
| Axial Misalignment (Δx) | 1.5 mm |
| Shaft Engagement | Keyway + setscrew |
| Lubrication | Grease (re-pack annually) |
Materials
HT250 Cast-Iron Hubs (Standard)
Hubs sand-cast from HT250 grey iron with stress-relief annealing prior to machining. The hub section thickness at the slot edge has been specified with a 2.5× safety factor against the 500 N·m peak service torque, providing fatigue endurance well beyond expected service life. For corrosive environments, QT500-7 ductile iron is the documented hub upgrade.
Surface-Hardened Steel Slider
Slider plate is 45-steel medium-carbon stock, induction-hardened on the four sliding faces to HRC 45–50. Edge geometry is precision-ground to maintain consistent slot engagement across the rated misalignment envelope. 40Cr alloy slider variant is documented for high-cycle reversal duty, with HRC 55 surface hardness for extended wear life.
Keyway Mounting with Locking Set-Screw
H7-reamed bore with parallel keyway to GB/T 1096. M12 set-screw locks the hub against axial creep. For applications with very high axial-shock loading, a taper-bushed mounting via locking assemblies is documented as a custom-build alternative.
Engineering Considerations at 5–13 kW
The transition from light-industrial to mid-process duty exposes a different set of engineering trade-offs than at the smaller SL70 / SL90 sizes. At 500 N·m and 250 r/min — roughly 13 kW peak continuous — coupling failure consequences include not just the loss of the driven equipment but cascade effects on upstream and downstream equipment that depended on its output. A pump failure cascades into reservoir overflow or starved downstream process. A mixer failure cascades into product reformulation. A conveyor-head failure cascades into upstream production halt. The selection criterion therefore tightens: not just “does the coupling work?” but “what is the probability of unexpected failure over a 5-year ownership window?”
The SL100 answers this question with a service profile that is, frankly, hard to beat. The cast-iron hubs are dimensionally stable for decades. The slider plate is a wear part, but its wear is gradual, visible, and inspectable — failure is anticipated, scheduled, and absorbed during planned shutdowns. The grease-lubricated metallic interface tolerates a wide range of operating environments without specialised maintenance training. And the 1.4 mm parallel-misalignment tolerance is sufficient to forgive any realistic stack-up tolerance in a typical industrial frame fabrication. The result is a coupling that, in continuous field service, exhibits a remarkably flat reliability profile across years of duty — exactly the failure characteristic that maintenance planners value.
Industry Applications
Mid-Range Process Pumps
Centrifugal, gear, and positive-displacement pump drives in chemical, petrochemical, and water-treatment installations. The 1.4 mm parallel tolerance absorbs thermal growth between cold-start and operating temperatures.
Process Mixers & Agitators
Small-to-medium impeller-shaft drives on chemical-process mixers, slurry agitators, and food-process blenders. Greased metallic interface tolerates the demanding shock-load profile of mixer start-up.
Meat & Protein Processing
Conveyor-belt and screw-auger drives on slaughterhouse and protein-processing lines. QT500 hub upgrade addresses the chlorinated wash-down ambient typical of these facilities.
Mid-Range Conveyor Drives
Head-pulley and intermediate-shaft drives on belt and roller conveyors. Slider absorbs the start-up inertia of conveyor loading without flexure of metallic components.
Bottling & Filling Lines
Drive coupling on the main carriage shaft of medium-format bottling lines. Constant-velocity output preserves cycle-time consistency that determines line throughput.
Coastal Aquaculture Systems
Aerator-paddle and water-circulation pump drives on aquaculture farms. QT500 hub variant tolerates the salt-spray ambient of coastal installations.
Why Choose Ever-power
Quality & Compliance
SL100 production runs under ISO 9001:2015 with full melt-traceability for every cast-iron heat. Documentation pack includes RoHS, REACH, and CE conformity declarations as standard. For chemical and petrochemical customers, supplementary process-chemistry compatibility statements covering grease vs. solvent contamination are available.
Customisation
Standard bores 36 and 40 mm; oversized variants up to 45 mm produced regularly. Imperial bore variants (1-1/4″, 1-3/8″, 1-1/2″) supported for North American export markets. QT500-7 ductile-iron hub upgrade is documented and lead-time-stable. Custom hub face machining (for direct mounting to non-standard motor flanges) is supported through engineering review.
Spare Parts & Service
SL100 slider plates and key sets stocked for 2-business-day shipment. English-speaking engineering desk responds within 24 hours. For fleet operators, customer-specific buffer stock at customer-nominated 3PL warehouses is offered for JIT delivery.
Customer Reviews & Case Studies
★★★★★
Belgium — Brewery Engineering Department
Used in: Mash-tun rake-drive and wort-pump couplings across an 800 000 hl craft brewery expansion.
Feedback: “Standardised on SL100 across 14 different drive points during this expansion. Three years on, none have required service beyond the scheduled annual grease repack. The drop in unplanned coupling-related downtime versus our previous spider-coupling fleet has been one of the best operational improvements of the project.”
★★★★★
Norway — Salmon Aquaculture Operator
Used in: Aerator-paddle drives on offshore salmon-farm cages.
Feedback: “QT500 ductile-iron variant has handled four years of continuous saltwater exposure on offshore cages with no measurable corrosion. Annual maintenance is a 20-minute task per cage including grease repack and visual inspection. This is the only coupling specification on our equipment that requires no special attention from the maintenance crew.”
★★★★☆
Hungary — Industrial Wastewater Treatment OEM
Used in: Aerator-blower drive on a packaged industrial-wastewater treatment skid.
Feedback: “Skid-mounted equipment ships globally; cumulative misalignment from transport is the realistic engineering problem. The SL100’s 1.4 mm tolerance has eliminated post-delivery alignment-shimming for our installer network. Knock one star only because the SL100 mass (5.5 kg) makes it slightly heavier than the equivalent jaw coupling — minor weight-budget consideration for our customers.”
Frequently Asked Questions
How does the SL100 perform under direction-reversal duty?
The cross-slider geometry is fully symmetric; clockwise and counter-clockwise transmission characteristics are mechanically identical. For high-cycle reversal duty (more than 200 reversals per hour), the 40Cr slider variant with HRC 55 surface hardness is recommended for extended service life.
Can I retrofit an SL100 onto an existing spider-coupling install?
In most cases yes — the SL100’s 110 mm OD and 70 mm overall length fit within the envelope of equivalent-rated spider couplings from major manufacturers. Compare your installation’s coupling well dimensions to the SL100 catalogue drawing; if there is at least 5 mm radial and axial clearance, retrofit is straightforward.
What is the expected MTBF for the SL100?
For typical mid-process duty (50–70 % rated load, 250 r/min continuous, parallel offset below 0.5 mm, annual grease maintenance), expected mean-time-between-slider-replacement exceeds 7 years. Cast-iron hubs typically remain in service across multiple slider-replacement cycles — total hub MTBF is essentially the lifetime of the host equipment.
Are there approved alternative slider materials?
Beyond standard 45-steel and the 40Cr alloyed-steel upgrade, a bronze (CuSn10) slider is offered for applications requiring electrical isolation between motor and load. The bronze slider has reduced torque capacity (approximately 60 % of catalogue) and is documented under engineering review.
How do I specify the SL100 for non-standard bore combinations?
Mixed-bore variants (e.g., 36 × 40 mm, 38 × 40 mm) are produced without lead-time penalty. Specify both bore dimensions at order entry. Imperial-to-metric mixed bores (e.g., 1-3/8″ × 38 mm) for international equipment integration are supported through standard engineering review.
Quote SL100 for Your Mid-Range Drive
For mid-process pump, mixer, conveyor, and OEM equipment applications across food, beverage, chemical, and water-treatment industries, the SL100 has been a reliability anchor for decades. Browse the complete SL series catalogue, read about Ever-power’s production and supply network, or move directly to enquiry below.
