Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
NAK VG Type Nitrile Rubber Grease Oil Seal
High Precision Low Speed Rotary Shaft Seal for Grease Lubrication Systems
This VG-type seal addresses common challenges in grease-lubricated systems, such as poor sealing against thick lubricants, premature lip wear, and ingress of dirt or water. Manufactured to NAK standard specifications, its optimized lip profile creates consistent, low-friction contact with the shaft to prevent grease leakage while forming an effective barrier against external contaminants. The durable NBR material offers excellent resistance to greases and mild chemicals, making it a cost-effective, dependable sealing solution for a wide range of industrial and automotive applications.
5.0
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
1. Product Advantages
The high-quality nitrile rubber material provides excellent compatibility with various greases and lubricants, preventing swelling, hardening or degradation over extended use. The precision-engineered VG lip profile maintains consistent contact pressure with the shaft, ensuring reliable grease retention while minimizing friction and wear for longer service life. The seal’s rigid construction maintains dimensional stability under varying operating temperatures and pressures, reducing the risk of leaks caused by deformation. Its standard NAK dimensions ensure a precise fit during installation, eliminating the need for modifications and simplifying equipment maintenance.
2. Working Principle
When installed in the housing bore, the VG-type oil seal’s outer diameter forms a tight interference fit to prevent seal movement, while the inner sealing lip makes controlled contact with the rotating shaft. This contact creates a thin lubricating film at the lip-shaft interface, reducing friction and wear while blocking grease from leaking out. The seal also acts as a barrier against dust, dirt and moisture, preventing them from entering the bearing cavity and causing premature wear or failure.
3. Product Details
Each NAK VG grease oil seal is manufactured from high-grade nitrile rubber using precision molding processes, ensuring accurate dimensions and consistent lip geometry. The seals undergo strict quality checks, including dimensional verification, visual inspection for surface defects and performance testing to ensure reliable sealing function. Finished seals are individually packaged in protective bags to prevent contamination and damage during storage and transit, with clear labeling for easy identification.
4. Application Range
Ideal for use in low-speed rotating equipment such as agricultural machinery, electric motors, gearboxes, pumps and automotive components where grease lubrication is used. Suitable for sealing various types of greases, including lithium-based and multipurpose greases, in light to medium-duty operating environments.
5. Installation & Maintenance Guidelines
Proper installation is critical to seal performance; always use a press tool to avoid damaging the seal lip or outer casing during fitting. Ensure the shaft surface is smooth and free of burrs or contaminants before installation. During routine maintenance, inspect the seal for signs of leakage, cracking or excessive wear, and replace it if damage is detected to prevent bearing failure. Using the correct size and type of grease as specified for the application will help extend the seal’s service life.
6. Forever Seals’ Selling Points
Forever Seals is committed to providing reliable industrial sealing solutions, with strict quality control processes to ensure each NAK VG oil seal meets performance and durability standards. We maintain inventory of standard sizes for fast delivery, and our technical team can provide guidance on seal selection, installation and maintenance to help customers optimize equipment performance and reduce downtime. We focus on delivering cost-effective, high-quality sealing products that meet or exceed OEM specifications.
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