The Difference Between NBR Seal and FKM Seal of the nsk bearings

The Difference Between NBR Seal and FKM Seal of the nsk bearings

The differences are as follows:

1. Heat resistance

FKM seal: FKM sealing ring heat resistance characteristics and silica gel, can be said to be the stage of vulcanized rubber polyurethane elastomer stronger, the basic type of fluorine rubber number FKM or FPM, its product output can be long-term in 200 application, and perfluoro ether vulcanized rubber FKM can continue to be applied at 330.

NBR seal: higher 100 application, from the heat resistance of NBR sealing ring.

2. Physical performance

FKM seal: FKM seal has high-quality physical and physical properties, has advantages in elastic compressive strength and tensile elongation level.

NBR seal: NBR seal has excellent physical reflectivity and production characteristics.

3. Reliability

FKM seal: FKM seal has smooth organic chemical characteristics, it is also at the present stage of all vulcanized rubber polyurethane elastomers in a variety of substances with stronger characteristics. Fluorine rubber oil resistant silicon ether, magnesium chloride oil, crude oil, base oil, double ester oil, resistance to most of the organic chemistry, inorganic-organic solvent, resistance to strong oxidizer, drugs, etc., in which fluorine rubber resistance of the material not only to the following categories: low substructure of the ether, ester, ketone, and all of the ammonia, amines, chlorosulfonic acid, hydrochloric acid, ammonium sulfate type of gear oil.

NBR seal: poor cold resistance, poor resistance to reactive oxygen species, poor dielectric strength, low ductility.

4. Anti-aging characteristics

FKM seal: FKM seal has good resistance to weather embrittlement and reactive oxygen species. The yield of fluoro glue products is still satisfactory after five years of storage.

NBR seal: NBR seal anti-aging performance is a little poor, general nitrile rubber product output can be stored for ten years.

5. Ultra-low temperature characteristics

FKM seal: because the organic chemical structure of FKM itself causes the cold resistance of FKM is not very excellent.

In the specific application of fluorine rubber ultra-low temperature characteristics are also general, unless the addition of a unique preservative can make fluorine rubber cold does minus 30 degrees, otherwise, the general fluorine rubber only does minus 10 degrees.

NBR seal: Generally NBR adhesives can be cold resistant -30, and with extremely super cold resistance nitrile adhesives can be cold resistant -50.

Welcome to contact us via if you need to know more information about NBR and FKM seal of nsk bearings.

The nsk bearings brief introduction

The nsk bearings combines the traditional cylindrical roller bearing and spherical roller bearing configurations. Its proprietary outer race and roller profiles plus a cylindrical inner ring combine the key attributes of both bearing types. This unique three-point contact design geometry provides simultaneous misalignment and axial displacement performance, optimizes contact stress distribution, and helps promote roller stability. The result is a more dynamic, more reliable bearing.

The nsk bearings consists of an inner ring, outer ring, and roller/retainer assembly. The separable components simplify installation, removal, and inspection. The retainer holds the rollers in position, creating a single assembly that prevents the rollers from being damaged during mounting and dismounting. The inner ring and outer ring can be installed in either direction, helping to avoid common mounting errors. No special tooling is required. Three-quarter angle view of the three main ADAPT bearing components on a white background – inner race, cage and rollers, and the outer race.

The nsk bearings Applications

The metal industry\'s tough environment places extreme demand on equipment. That makes maintaining operations and reducing downtime essential in continuous casters where performance and reliability are critical.  The nsk bearings innovative design redefines the preferred choice of bearings for the float position in strand roll support segments.

The nsk bearings for Paper Mill Applications

From paper dryers to shaker screens and blowers and fans, the nsk bearings outperforms in tough environments. The nsk bearings provides a better option for handling misalignment and axial float.

The nsk bearings Design Attributes

Size range: 100 mm to 170 mm bore (3.94 in. to 6.69 in.)

Full-complement design with a roller retainer to help eliminate roller fallout

Simultaneous full misalignment and axial displacement capabilities

Unique internal geometry optimizes contact stress and roller stability

Standard ISO dimensions simplify interchange with toroidal and spherical roller bearings

High static radial capacity for maximum reliability

Misalignment capability of +/-0.5 degrees

The nsk bearings supplier

Luoyang FV generally uses TIMKEN3311 for steel mill customers, which is also a kind of carburized steel and is often used as a rolling mill bearing material by well-known steel mills at home and abroad.

FV bearing is a professional manufacturer of heavy industry bearings. FV bearing devotes to the research and manufacture of metallurgy, mining, wind power, and cement bearings, and has earned a high reputation in many areas overseas, especially its rolling mill bearing, some of which can perfectly replace famous brand bearings. So far, FV bearing\'s superior products have included cylindrical roller bearings, tapered roller bearings, spherical roller bearings, ball bearings, and slewing bearings. Combining customers\' actual applications, FV bearing provides customers with bearings comparable to the well-known brand bearings and high-quality solutions. Welcome to contact us via if you have any needs.


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