Gear box oil seal for reducer

III. Key Performance Requirements

1. Material Performance
   • Oil Resistance: Rubber materials (such as NBR, FKM) must withstand long-term immersion in lubricating oil without swelling or hardening.
   • High Temperature Resistance: Select materials based on the gearbox operating temperature, such as NBR (-40°C~120°C) for ordinary working conditions and FKM (-20°C~200°C) for high-temperature scenarios.
   • Wear Resistance: The sealing lip in long-term contact with the shaft must have anti-wear capabilities, with some oil seals adding wear-resistant fillers such as graphite or molybdenum disulfide.
2. Sealing Precision
   • Radial Tolerance: The fit clearance with the shaft is typically 0.05~0.2mm. Excessive clearance easily causes oil leakage, while too small clearance increases friction and heat generation.
   • Lip Design: The angle of the sealing lip (usually 30°~45°) and spring tension need optimization to ensure tight fit with the shaft surface while reducing wear.
3. Environmental Adaptability
   • Dust-proof Design: Some oil seals have an external dust-proof lip (such as TB type) to block large particles.
   • Anti-creep Structure: The metal outer ring of the skeleton oil seal must have an interference fit with the seat hole to prevent the oil seal from shifting during high-speed rotation.

IV. Selection Criteria

1. Based on Working Conditions

• Speed: Choose skeleton oil seals for low speeds and labyrinth or mechanical seals for high speeds.
• Temperature: Use silicone rubber (-60°C~200°C) for low temperatures and fluororubber or metal seals for high temperatures.
• Load: Select wear-resistant combined oil seals for heavy-load working conditions (such as crane speed reducers).

2. Based on Environmental Conditions

• Dust Level: Choose combined oil seals with dust-proof lips (such as U-shaped or V-shaped structures) for open-air or dusty workshops.
• Humidity and Corrosiveness: Use corrosion-resistant materials (such as stainless steel skeleton + FKM rubber) for humid environments and perfluoroelastomer (FFKM) for acid-base environments.

3. Based on Installation Space

• Shaft Diameter and Seat Hole Size: Strictly match the inner diameter (d) and outer diameter (D) of the oil seal. Common specifications include φ20×φ40×7mm, φ50×φ72×12mm, etc.
• Axial Length: Select ultra-thin oil seals (thickness ≤5mm) for space-constrained scenarios, and reserve sufficient installation depth for complex structures.

FAQ

Who are we?
We are PQK Oil Seal, a leading manufacturer and supplier specializing in high-quality oil seals. Our expertise in the industry ensures that we deliver reliable and durable products to meet various industrial needs.

How can we guarantee quality?
We guarantee quality through rigorous testing and quality control processes. Our oil seals are designed to withstand harsh conditions, ensuring long-lasting performance and reliability for your applications.

What can you buy from us?
You can purchase a wide range of oil seals from us, including waterproof and anti-fouling types. Our products are tailored to meet diverse industrial requirements, ensuring optimal performance and protection.

Why should you buy from us not from other suppliers?
Choosing us means opting for superior quality and exceptional customer service. Our commitment to innovation and customer satisfaction sets us apart, ensuring you receive the best products and support in the industry.

What services can we provide?
We offer comprehensive services including product customization, technical support, and fast delivery. Our team is dedicated to providing solutions that meet your specific needs and enhance your operational efficiency.

Can I customize this product for my business?
Yes, we offer customization options to tailor our oil seals to your specific business requirements. Our team works closely with you to ensure the product meets your exact specifications and operational needs.

How fast can I receive my order?
We prioritize efficient processing and delivery to ensure you receive your order promptly. Our streamlined logistics and dedicated support team work to minimize lead times and ensure timely delivery.