Metric SC Rubber Oil Seal

Metric SC Rubber Oil Seals are one of the most widely used radial shaft seals for preventing lubricant leakage and blocking dust, moisture, and contaminants from entering rotating equipment. The SC design features a double-lip structure with an external rubber-coated outer diameter (OD), providing improved sealing reliability, easier installation, and better housing compensation than metal-cased seals.

As a professional rubber oil seal manufacturer, we supply standard metric SC oil seals and customized sealing solutions for distributors, industrial wholesalers, OEM equipment manufacturers, and aftermarket suppliers worldwide.

Primary Sealing Lip: Precisely molded with an optimized contact angle and preloaded with an integrated carbon or stainless steel garter spring to maintain continuous radial force against the rotating shaft. This design prevents lubricant leakage during continuous rotation, maintains a stable lubricating film, reduces friction while ensuring sealing efficiency, and extends bearing and gearbox service life. Compared with ordinary single-lip seals, the SC profile provides more stable sealing performance in continuous rotation applications.

Secondary Dust Lip: Forms an auxiliary barrier to effectively block external contaminants such as dust, mud, water splash, metal particles, and fine abrasive powder. This makes Metric SC oil seals especially suitable for equipment operating in dusty factories, construction machinery, agricultural equipment, mining environments, and outdoor applications, significantly minimizing bearing wear and maintaining lubricant cleanliness.

Rubber-Coated Outer Diameter (OD): Unlike metal outer case oil seals, Metric SC seals feature a fully rubber-coated outer diameter. This provides better sealing between the seal and housing bore, compensates for minor housing surface imperfections (especially effective for aluminum or cast housings with slight machining tolerances), reduces the risk of static leakage, improves vibration resistance, and enables easier press-fit installation.

High Precision Lip Geometry: Every sealing lip is manufactured using precision molds to ensure uniform lip pressure, stable radial load, reduced eccentric wear, and consistent sealing performance. Accurate lip geometry minimizes heat generation while maintaining effective sealing throughout the seal's operating life.

Different applications require different elastomers. We manufacture Metric SC oil seals using materials matched to temperature, chemicals, and operating media:

Stable Quality Between Production Batches: For distributors and OEM customers, dimensional consistency is critical. We maintain consistent production through precision compression and injection molds, controlled rubber compound formulation, automated vulcanization processes, and in-process dimensional inspection to reduce installation problems caused by inconsistent seal dimensions.

Broad Metric Size Inventory: We manufacture a complete range of metric SC oil seals covering standard industrial shaft sizes, delivering faster delivery, reduced sourcing complexity, lower inventory costs for distributors, and easier mixed-size purchasing. Custom sizes can also be produced according to drawings or samples.

Custom Rubber Compound Development: Different industries require different sealing properties. We offer customized compounds developed according to actual operating requirements for high-temperature applications, low-temperature environments, chemical resistance, bio-based lubricants, food-grade equipment, and heavy-duty industrial machinery.

OEM & Private Label Support: We support wholesale customers with comprehensive OEM services, including customer logo, branded packaging, custom labels, barcode printing, size identification, material marking, special colors, and customized cartons.

Strict Quality Control Throughout Production: Each production batch undergoes systematic inspection, including incoming raw material verification, rubber hardness testing (Shore A), dimensional measurement, spring installation inspection, lip appearance inspection, surface defect inspection, random leakage verification, and packaging inspection before shipment using precision instruments.

Metric SC Rubber Oil Seals are widely used in rotating equipment across multiple core industries:

Automotive: Wheel hubs, gearboxes, transmissions, differentials, and engine accessories.

Electric Motors: Industrial motors, cooling fans, pumps, and generators.

Hydraulic Equipment: Hydraulic pumps, hydraulic motors, and power units.

Agricultural Machinery: Tractors, harvesters, seeders, and irrigation equipment.

Construction Equipment: Excavators, loaders, rollers, and cranes.

Industrial Machinery: Gear reducers, conveyor systems, compressors, machine tools, and mixers.

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