Product Details
Si₃N₄ Self-aligning Ball Bearing
Parameter characteristics
Product Details
Si₃N₄ Self-aligning Ball 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 |
|
|
2309 |
45 |
100 |
36 |
1.5 |
53 |
/ |
92 |
1.5 |
0.95 |
0.5 |
/ |
1.23 |
Si3N4 self - aligning bearings are an innovative and high - performance solution in the field of bearings.
Silicon nitride (Si3N4) is the key material for these bearings. Si3N4 is known for its remarkable hardness, which enables the bearings to withstand high - load applications. This hardness also contributes to excellent wear resistance, ensuring a long service life even in harsh operating conditions.
The self - aligning feature is another significant advantage. It allows the bearing to compensate for misalignment between the shaft and the housing. This is especially useful in situations where perfect alignment is difficult to achieve, such as in some industrial machinery with complex setups or in cases where there may be slight deflections during operation.
In addition, Si3N4 self - aligning bearings often have low friction characteristics. This reduces energy losses during operation, leading to increased efficiency of the overall system. Their high - quality construction and material properties make them suitable for a variety of applications, including high - precision machinery, automotive components, and aerospace equipment.
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 |
Product parameter manual
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