MXRR HYBRID CERAMIC BEARINGS

MXRR is proud to offer, different kits of HYBRID CERAMIC BEARINGS for Honda CRF dirt bikes.

These particular type of bearings are designed to be antifriction: constructed of High Nitrogen steel inner, outer rings and high temperature nylon retainers, with ceramic rolling elements in place of steel.


MXRR Ceramic hybrid bearings use Silicon Nitride balls (Si3N4) to meet and exceed today’s performance in extreme racing application requirements, offering a long list of characteristics far superior to those of conventional all-steel bearings.


The microstructure of Si3Ni4 consists of elongated crystals that interlock into micro-rods. The combination of good tribological properties and excellent fracture toughness makes silicon nitride ceramics predestined for applications as balls and rolling elements for light and extremely precise bearings, heavy-duty ceramic forming tools and automotive components subject to high stress.

Silicon Nitride bearing ballls have extremely smooth surface and black color.

 

            

Features and Benefits:

·                     Increased speed capability over conventional all steel bearing

·                     Increased stiffness

·                     Reduced weight

·                     Higher accuracy

·                     Less friction resulting in less heat

·                     Reduced lubrication requirements

·                     All of which can lead to extended operation life                             

High Speed and Acceleration

Ceramic rollers are in average 40% less dense than steel, the resulting reduction in weight decreases centrifugal forces imparted on the rings, reducing skidding, allowing 30 to 50% higher running speeds with less lubrication, ensuring increased performance. 

  

                im_hybridchart4           im_hybridchart3

Increased Stiffness


Silicon nitride rollers have a 50 % higher modulus of elasticity (resistance to deformation) than steel, which means a 15 to 20% increase in rigidity, improving accuracy. The results of this feature are greater ability to withstand vibrations and increased load.

 

                 im_hybridchart2        im_hybridchart1

Higher Accuracy

Ceramic rollers have a smoother finish than steel, therefore vibration and spindle deflection is reduced allowing higher rotation speeds.

Less Friction, Less Heat

Ceramic Hybrid bearings truly are “anti-friction". Lower friction leads to less wear, less lubrication, less energy consumption, reduced sound level and extends life lowering your operating costs and increasing performance. Lowered operating temperatures improve reliability of the work environment.

 

                 im_hybridchart7            im_hybridchart3

Reduced Lubrication Requirements

Ceramic Hybrid bearings improve kinematic behaviour, generating less friction and demanding less lubrication. This can minimize risk of lubrication failure under extreme load and application conditions.

Low Thermal Expansion

A low thermal expansion coefficient allows HYBRIDS with ceramic rollers to undergo smaller changes in contact angle reducing preload variations improving life and maintaining tolerances.

Extended Operating Life

With their numerous advantages, Ceramic Hybrid bearings typically yield up to 3 or even 5 times longer life than conventional steel-steel ball bearings depending on the application.

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CERAMIC MATERIAL PROPERTIES

Mechanical

SI/Metric

Si3N4

Density

gr/cc

3.29

Porosity

% 

0

Color

—

black

Flexural Strength

MPa

830

Elastic Modulus

GPa

310

Shear Modulus

GPa

—

Bulk Modulus

GPa

—

Poisson’s Ratio

—

0.27

Compressive Strength

MPa

—

Hardness

Kg/mm2

1580

Fracture Toughness KIC

MPa•m1/2

6.1

Maximum Use Temperature
(no load)

°C

1000

Thermal

 

 

Thermal Conductivity

W/m•°K at room temperature

30

Coefficient of Thermal Expansion

10–6/°C

3.3

Specific Heat

J/Kg•°K

—

Electrical

 

 

Dielectric Strength

ac-kv/mm (volts/mil)

—

Dielectric Constant

—

—

Dissipation Factor

—

—

Loss Tangent

—

—

Volume Resistivity

ohm•cm

—

 

COMPARATIVE TABLE FOR CERAMIC / STEEL / STAINLESS STEEL

Item

Ceramic, Si3N4

52100 Steel

440C

Density

3.29 gr/cm3

7.8 gr/cm3

7.65 gr/cm3

Service Temp

700 °C

150 °C

180 °C

CTE

3.31 µm/m°C

11.9 µm/m°C

10.3 µm/m°C

Hardness

~ 76 RC

62 RC

58 RC

Magnetism

No

Yes

YES

Conductivity

Non-conductive

Conductive

Conductive

Corrosion Resistance

Excellent

Poor

Fair