NBR Oil Seal — Nitrile Shaft Seals by Dingtong

Dingtong, as oil seal manufacturer, NBR Oil Seals are precision-engineered radial lip seals made from Nitrile Butadiene Rubber (NBR). Designed to keep lubricants in and contaminants out, our NBR seals are optimized for automotive, industrial, hydraulic and rotary equipment where oil and fuel resistance, mechanical durability, and cost-efficiency matter.

Key Features

• Material: NBR (Nitrile Butadiene Rubber) compound formulated for excellent oil, fuel and grease resistance.

• Temperature range: Typical operating range -40°C to +120°C (select compounds up to +125°C).

• Hardness: Commonly available in 60–90 Shore A for abrasion and sealing balance.

• Design: Single lip, double lip and spring-energized variants for static and dynamic sealing.

• Protection: Integrated dust lip and anti-extrusion features available for heavy-duty applications.

• Customization: OEM size, color, and compound custom runs supported; short lead times for production batches.

Typical Applications

Dingtong NBR Oil Seals are widely used where hydrocarbon compatibility is required. Typical application sectors include:

• Automotive engines, transmissions and wheel hubs

• Hydraulic cylinders, pumps and valves

• Industrial gearboxes and reducers

• Rotating shafts in compressors and motors

• Marine propulsion systems and fuel-handling equipment

Technical Specifications

Material & Compound Notes

NBR is the most cost-effective elastomer for oil-resistant sealing. Our NBR compound is engineered for:

• High abrasion resistance for long dynamic life

• Low swell in common lubricants and fuels

• Good compression set and resilience

Design Variants

Single-Lip NBR Oil Seal

Simple, economical, suitable for general rotary sealing where contamination is limited and pressure is low to moderate.

Double-Lip NBR Oil Seal

Provides both oil retention and dust exclusion — a common choice for transmissions, gearboxes and wheel-end applications.

Spring-Energized Lip Seal

Includes a garter spring to maintain contact force over life and temperature cycles; ideal where consistent sealing force is required.

How to Specify the Right NBR Oil Seal

1. Provide shaft diameter, housing bore, axial width and radial cross-section.

2. Specify operating temperature range, expected shaft speed (RPM) and fluid type.

3. Indicate pressure conditions (static & dynamic) and installation constraints.

4. If available, share shaft surface finish and runout tolerances for best-fit recommendations.

Procurement Checklist — What Buyers Ask

• Required size and tolerance class

• Operating fluid and temperature ranges

• Expected life or maintenance interval

• Quantity (sample, small batch, mass production)

• Packaging, traceability and inspection reports (PPAP / FAI on request)

• Lead times and tooling costs for custom parts

Quality & Manufacturing

Dingtong applies strict in-line inspection and batch traceability. Production processes include precision molding, post-curing, dynamic balancing where required, and 100% dimensional checks for critical production lots. Material certificates and test reports are available on request.

Dingtong Solve your Concern

We offer complete customization capabilities and engineering support, from prototype to mass production. We can recommend the most suitable NBR formulation and lip design based on your shaft diameter, bore diameter, shaft surface roughness, working media, and operating conditions (temperature, speed, pressure). All production batches undergo strict incoming material inspection and in-line process control, and we can issue material certificates, hardness/dimensional test reports, and first article inspection (FAI/PPAP) records on demand to ensure traceability. In terms of delivery and cost, we support flexible MOQs, rapid trial production, and competitive mass production quotes, while optimizing packaging and logistics to reduce customer inventory risks. When encountering special media or extreme operating conditions, Dingtong's application engineers can conduct compatibility assessments and life predictions, and quickly provide alternative materials or enhanced design recommendations. This transforms procurement concerns into verifiable technical and commercial advantages, helping customers reduce maintenance frequency, extend equipment uptime, and control overall procurement costs.

Comparison: When to Choose NBR vs. Other Elastomers

NBR is the recommended choice when oil and fuel resistance, abrasion performance and cost are the priority. If your application requires extreme heat resistance, low-temperature flexibility beyond -40°C, or resistant to aggressive chemicals, please contact our engineering team for alternative compounds.

FAQ

Q: What temperature can Dingtong NBR Oil Seals handle?

A: Standard NBR seals handle approximately -40°C to +120°C. For intermittent or continuous higher temperatures, ask about high-temp NBR grades or alternative materials.

Q: Can you produce custom sizes or prints?

A: Yes. Dingtong provides OEM and custom-size production with tooling support and small-batch prototypes.

Q: How do I check compatibility with my hydraulic fluid?

A: Provide the fluid specification (e.g., ISO name, SAE number or MSDS) and operating conditions; we will run a compatibility assessment and recommend a compound.