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Home Product 15*21*4 High-Grade Oil Seal, CRW3 Series Shaft Seal, Heavy-Duty Rubber Seal for Automotive & Machinery
15*21*4 (high quality grade)

15*21*4 High-Grade Oil Seal, CRW3 Series Shaft Seal, Heavy-Duty Rubber Seal for Automotive & Machinery

15x21x4 Oil Seal
15x21x4 Shaft Seal
Premium 15x21x4 Lip Seal
15*21*4 (high quality grade)
Premium 15x21x4 Lip Seal for durable oil and shaft sealing. High-grade construction prevents lubrication leaks, resists contaminants, and ensures reliable performance in automotive, industrial, or machinery applications. Compatible with 15x21x4 Oil Seal and 15x21x4 Shaft Seal requirements.
Categories:Power Transmission
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Product Description

The 15x21x4 Oil Seal is a high-performance radial shaft seal designed for demanding industrial applications. Constructed with premium-grade materials like nitrile rubber (NBR) or fluorocarbon (FKM), this 15x21x4 Shaft Seal features a precision-engineered lip design that ensures exceptional sealing integrity under dynamic conditions. It operates reliably within a temperature range of -40°C to +120°C (-40°F to +250°F) and handles shaft speeds up to 15 m/s with minimal friction. The 15x21x4 Lip Seal excels in automotive, agricultural, and heavy machinery systems, offering superior resistance to oils, greases, and abrasion. Its compact 15mm inner diameter, 21mm outer diameter, and 4mm width enable easy integration into standard housings. While this premium seal delivers extended service life in harsh environments, prolonged exposure to extreme pressures (>1.5 MPa) or aggressive chemicals may reduce effectiveness. The dual-lip construction enhances contaminant exclusion while maintaining lubrication retention for rotating shafts.
Parameter Specification
Type 15x21x4 Oil Seal / 15x21x4 Shaft Seal / Premium 15x21x4 Lip Seal
Material Nitrile Rubber (Standard) / FKM/Viton (High-Temp)
Spring Material Stainless Steel 304
Reinforcement Steel Case (Optional Aluminum)
Inner Diameter 15 mm ±0.2 mm
Outer Diameter 21 mm ±0.3 mm
Width 4 mm ±0.1 mm
Pressure Range 0-0.3 MPa (Static) / 0-0.1 MPa (Dynamic)
Temperature Range -40°C to +120°C (Nitrile) / -20°C to +200°C (FKM)
Surface Speed ≤ 12 m/s
Sealing Direction Bidirectional Rotation (Single Spring Design)
Lubrication Compatibility Mineral Oils, Grease, Water, Hydraulic Fluids
Certification ISO 6194, DIN 3760, ASTM D2000
question:Do you have a professional product selection engineering team?
answer:Yes, we have a skilled engineering team specialized in industrial automation product sourcing and quality assurance.
question:How do you handle shipping?
answer:We support global shipping via DHL, FedEx, UPS, and other mainstream logistics providers for reliable delivery.
question:Why choose your company for purchases?
answer:As Asia's leading industrial automation trader with 20+ years of trusted expertise, 85% of our revenue comes from repeat clients.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:Do you have a professional product selection engineering team?
answer:Yes, we have a skilled engineering team specialized in industrial automation product sourcing and quality assurance.
question:How do you handle shipping?
answer:We support global shipping via DHL, FedEx, UPS, and other mainstream logistics providers for reliable delivery.
question:Why choose your company for purchases?
answer:As Asia's leading industrial automation trader with 20+ years of trusted expertise, 85% of our revenue comes from repeat clients.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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