Product Details
Si₃N₄ Angular Contact Bearing
Parameter characteristics
Product Details
Si₃N₄ Angular Contact BearingDimensional Table
|
Bearing Model |
Overall Dimensions(mm) |
Mounting Dimensions(mm) |
Weight (kg) (Ref.) |
|||||||||
|
d |
D |
B |
r（Min） |
da（Min） |
da（Max） |
Da（Max） |
ra（Max） |
ZrO₂ |
Si₃N₄ |
plastic |
SUS |
|
|
7310 |
50 |
110 |
27 |
2 |
60 |
/ |
100 |
2 |
0.82 |
0.44 |
0.147 |
1.066 |
The Si₃N₄ Angular Contact Bearing is an exceptional engineering component.
Made from silicon nitride (Si₃N₄), it offers remarkable properties. Firstly, Si₃N₄ is known for its high hardness, which endows the bearing with excellent wear resistance. This means the bearing can withstand heavy loads and high - speed rotations for extended periods without significant degradation.
In terms of its angular contact design, it is optimized to handle both radial and axial loads simultaneously. The contact angle between the balls and the races is carefully engineered to distribute these loads effectively. This design also enables the bearing to provide precise positioning and high - rigidity performance, making it ideal for applications where accuracy is crucial, such as in precision machinery and high - speed spindles.
The use of Si₃N₄ in the bearing construction also results in a lower density compared to traditional steel bearings. This not only reduces the overall weight of the bearing but also contributes to lower inertia, allowing for faster acceleration and deceleration in dynamic applications.
Furthermore, the Si₃N₄ Angular Contact Bearing has good thermal properties. It can dissipate heat efficiently, which is vital for maintaining stable performance during continuous operation at high speeds or under heavy loads. Overall, this type of bearing is a top - choice for various industrial and high - performance applications.
Product Features
Silicon Nitride (Si3N4) all-ceramic bearings have the characteristics of anti-magneticinsulation, wear-resisting and corrosion-resistant, oil-freeself-lubricating, high temperature and cold resistance and so on. Compared with zirconia (ZrO2) material, Zirconia (Zirconia) material is suitablefor higher speed and load capacity, worse working condition and higher ambient temperature. The expansion caused by temperature differencedoes not occur when the long-term service temperature is between 100℃and 800℃. At the same time can provide for high-speed high-precision high-tifnes spindle precision ceramic bearings, the highest manufacturing accuracy upto P4 to UP class. Slicon nitride full ceramicbearing rings and rolling elements are made ofsilicon nitride (Si3N4)ceramics. Polytetraazide (PTFE) is used as the standard equipment for theretainer, and GRPA66-25, PEEK, Pl, and phenolic cloth bakelite pipes are also commonly used.
Product Configuration
|
Inner And Outer Ring |
Sl3N4 ( Silicon nitride ) |
|
Cage |
PTFE ( Poly tetra fuoroethylene )、PEEK ( polyetheretherketone )、PA ( Polyamide )、UPE(Ultra-high molecular weight polyethylene)、SUS( stainless steel ) |
|
Ball |
Sl3N4 ( Silicon nitride )、SSlC ( Silicon carbide ) |
|
Seal |
Open、ZZ、2RS |
Properties of Rare Earth Ceramics
| Properties | Unit | B4C | 99A1203 | ZrA-20% | ZrO2 | Si3N4 | SIC |
| 密度density | g/cm³ | 2.4~2.51 | 3.7~3.99 | 5.5 | 6 | 3.2 | 3.2 |
| Hardness | Kg/mm | 2700~3200 | 2300~2700 | 1470~1500 | 1300~1500 | 1700~2700 | 2350~2450 |
| Bending strength | MPa | 350~400 | 300~400 | 700 | 1000~1500 | 900 | 450~800 |
| Compressive strength | MPa | 1800~2500 | 2800~3500 | 2000 | 2000 | 3500 | 2250~3000 |
| Fracture Toughness | Mpa ·m-3/2 | 6 | 2~4 | 5~6 | 11 | 7 | 4~5 |
| Weibull modulus | GPa | >7 | >10 | >15 | >15 | >6 | |
| Elastic modulus | GPa | 407 | 260 | 210 | 320 | 410 | |
| Poisson's ratio | 0.2 | 0.23 | 0.3 | 0.26 | 0.16 | ||
| Coefficient of thermal expansion | ×10-6/℃ | 4.5 | 6.5~8.6 | 9.4 | 10.5 | 3.2 | 4.3 |
| Thermal shock resistance | △T℃ | 200 | 470 | 250 | 500 | 350 | |
| Resistance | Ω/cm² | 0.3~0.8 | >10~10 | >10 | >10 | >10 | 100~2 |
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