► Finer | Metric Series - NBR

Reliable Sealing Solutions for Industrial Equipment & Rotating Shafts

Keeping lubricants where they belong is just as important as preventing contaminants from entering critical machinery. A quality oil seal forms the first line of defence against lubricant loss, dirt ingress & premature component wear, helping rotating equipment operate efficiently throughout demanding industrial applications.

Finer Metric Series NBR Oil Seals are precision-engineered rotary shaft seals manufactured from Nitrile Butadiene Rubber (NBR), a widely used elastomer recognised for its excellent resistance to mineral oils, greases, hydraulic fluids & everyday industrial operating conditions. Designed for metric shaft & housing dimensions, these seals help retain lubrication while protecting bearings, shafts & housings from dust, moisture & airborne contaminants.

Used throughout manufacturing, agriculture, mining, transport, pumps, gearboxes, electric motors & industrial machinery, Metric Series NBR Oil Seals provide dependable sealing performance across countless rotating applications. During complete shaft assembly projects, compatible Shaft Collars, Metric Bearings & Bearing Accessories also contribute to reliable drivetrain performance.

Why Choose Finer Metric Series NBR Oil Seals?

Every rotating shaft creates an opportunity for lubricant leakage or contamination. Selecting the correct seal helps protect valuable machinery while reducing maintenance costs across the entire drive system.

Finer Metric Series NBR Oil Seals provide:

► Excellent oil retention.
► Reliable contamina
► High wear resistance.
► Good abrasion resistan
► Compatibility with mineral oils & greases.
► Reliable sealing performance.
► Long operating life.
► Suitable for metric shaft applications.
► Consistent sealing pressure.
► Reduced lubricant loss.
► Improved equipment reliability.
► Lower maintenance requirements.

Key Advantages

✔ Reliable rotary shaft sealing.
✔ Excellent protection against dust & dirt.
✔ Reduced lubricant leakage.
✔ Suitable for general industrial applications.
✔ Cost-effective preventative maintenance.
✔ Helps extend bearing service life.

Why NBR Remains One Of The Most Popular Seal Materials?

Material selection has a direct influence on seal performance, equipment reliability & maintenance frequency. NBR continues to be one of the most widely specified sealing materials because it balances durability, flexibility & chemical compatibility across a broad range of industrial operating conditions.

NBR sealing compounds help provide:

► Good resistance to mineral oils.
► Compatibility with hydraulic fluids.
► Excellent flexibility.
► Reliable lip sealing
► Good abrasion resistance.
► Consistent sealing under normal operating temperatures.
► Long service life in suitable environments.

For many industrial applications, NBR offers an excellent balance of performance, durability & value where aggressive chemicals or extreme temperatures are not present.

Common Applications

From compact electric motors to heavy industrial gearboxes, Metric Series NBR Oil Seals help protect rotating equipment throughout many industries.

Typical applications include:

► Electric motors.
► Gearboxes.
► Pumps.
► Hydraulic power units.
► Agricultural machinery.
► Conveyor systems.
► Industrial fans.

► Compressors.
► Manufacturing equipment.
► Material handling machinery.
► Packaging equipment.
► General rotating machinery.

Industry Example – Gearbox Maintenance

Industrial gearboxes depend on effective shaft sealing to retain lubricating oil while preventing dirt from entering bearing cavities.

Industry Example – Agricultural Equipment

Dust, mud & changing weather conditions place additional demands on rotating shaft seals, making dependable sealing essential for seasonal machinery.

Industry Example – Pump Assemblies

Pump shafts require effective sealing to minimise lubricant loss while protecting bearings from moisture & contaminants.

Maintenance teams responsible for rotating equipment may also find Spring Jobsite Prep – Getting Your Gear Ready useful when planning preventative maintenance before busy operating periods.

Product Selection Guide

Selecting the correct oil seal involves more than matching shaft size. The operating environment, lubricant type & shaft condition all influence sealing performance.

Shaft Diameter

Confirm the seal matches the shaft diameter for reliable lip contact.

Housing Size

Correct housing dimensions help maintain proper seal retention.

Lubricant Compatibility

Ensure the seal material matches the lubricant used within the equipment.

Shaft Surface Condition

Smooth, undamaged shaft surfaces improve sealing performance & reduce lip wear.

Operating Speed

Higher shaft speeds may influence seal selection depending on application requirements.

Operating Environment

Evaluate:

► Dust.
► Moisture.
► Temperature.
► Lubricant type.
► Shaft speed.
► Duty cycle.

Where shaft assemblies include locking components, compatible Lock Nuts & Washers help maintain secure bearing installation throughout the assembly.

Expert Tips

Small installation details often determine whether an oil seal performs reliably for years or fails prematurely.

Experienced maintenance professionals recommend:

✔ Inspect shafts for wear before installing a new seal.
✔ Replace damaged shafts or repair worn sealing surfaces where necessary.
✔ Lubricate the sealing lip before installation.
✔ Use suitable installation tools to avoid lip damage.
✔ Never install seals at an angle.
✔ Replace worn bearings if shaft movement exceeds acceptable limits.
✔ Inspect surrounding components whenever leakage is identified.

For workshops maintaining rotating machinery throughout the year, Winter-Proofing Your Tools: Maintenance Tips for the Cold Months offers additional maintenance ideas that help improve workshop readiness.

Metric Series NBR Oil Seals Compared With Other Seal Materials

Installation Best Practices

A quality oil seal performs at its best when every stage of the installation process is completed carefully. Correct fitting protects the sealing lip, maintains even contact with the shaft & helps maximise service life from the very first rotation.

For reliable installation:

► Inspect the shaft for scoring, corrosion or excessive wear.
► Clean the housing bore before fitting the new seal
► Lightly lubricate the sealing lip with the appropriate lubricant.
► Use a suitable installation tool to apply even pressure.
► Install the seal squarely within the housing.
► Confirm the garter spring remains correctly positioned.
► Rotate the shaft by hand before returning equipment to service.

Following these practices helps minimise installation damage while supporting long-term sealing performance.

Common Causes Of Oil Seal Failure

Oil seal problems often develop gradually rather than suddenly. Identifying the underlying cause helps prevent repeated failures & unnecessary downtime.

Addressing the root cause rather than replacing the seal alone helps improve equipment reliability over the long term.

Preventative Maintenance

Preventative maintenance plays a major role in extending seal life while protecting surrounding drivetrain components from unnecessary wear.

A practical inspection routine should include:

Seal Condition

Inspect for leakage, cracking, hardening or visible damage around the sealing lip.

Shaft Inspection

Check for wear grooves, corrosion or surface damage where the sealing lip contacts the shaft.

Bearing Condition

Excessive bearing movement can reduce sealing performance by allowing unwanted shaft movement.

Lubricant Condition

Monitor lubricant cleanliness, contamination levels & oil condition during scheduled servicing.

Operating Environment

Inspect for excessive dust, moisture, abrasive particles or chemical exposure that may shorten seal life.

Where rotating assemblies include precision bearing arrangements, compatible Metric Bearings help maintain shaft stability while supporting consistent sealing performance.