Product Details
Hybrid Ceramic Outer Spherical Bearing
Parameter characteristics
Product Details
Hybrid Ceramic Outer Spherical 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 |
|
|
UC215 |
75 |
130 |
77.8 |
/ |
/ |
/ |
/ |
1.86 |
0.99 |
/ |
2.418 |
|
Ⅰ、Product Definition and Core Advantages
Stainless steel hybrid ceramic ball bearings feature a hybrid design combining stainless steel races (440C/316/304/420) with silicon nitride (Si₃N₄) ceramic balls. This configuration integrates the strength and toughness of metals with the superior performance of ceramics, making them an ideal solution for corrosive environments and high-speed operating conditions.
Core Advantages Comparison
|
Property |
Stainless Steel Hybrid Ceramic Bearing |
All-Steel Bearing |
Improvement |
|
Corrosion Resistance |
No rust after 2000h salt spray test |
Rust spots after 500h |
4x corrosion resistance improvement |
|
Maximum Speed |
1.5×10⁶ dmN |
1.0×10⁶ dmN |
50% speed increase |
|
Service Life |
L10 life >8000 hours |
3000-5000h |
60-160% lifespan extension |
|
Friction Coefficient |
0.08-0.12 |
0.15-0.20 |
40% friction reduction |
Ⅱ、Typical Structure & Material Configuration
1. Race Materials
o 440C Stainless Steel：Hardness HRC58-60. Suitable for general corrosive environments.
o 316L Stainless Steel：Superior acid and alkali resistance. Used in food/chemical equipment.
o Surface Treatment：Optional CrN coating (3-5μm) for enhanced wear resistance.
2. Ceramic Balls
o Material：G5/G10 Si₃N₄（diameter tolerance ±0.25μm）
o Properties：Density 3.2g/cm³（60% weight reduction）, Hardness HV1700
3. Cage
o Standard Type：PTFE/PEEK（temperature resistance up to 260℃）
o High-Temperature Type：Graphite-reinforced (temperature resistance up to 800℃)
Ⅲ、Key Application Fields
|
Industry |
Application Scenarios |
Recommended Configuration |
|
Food Processing |
Filling machines, mixing shafts |
316L races + FDA-certified grease |
|
Chemical Equipment |
Centrifugal pumps, reactor agitators |
440C + CrN coating + acid-resistant seals |
|
Medical Devices |
Dental handpieces, surgical instruments |
316L + sterilizable ceramic balls |
|
Marine Engineering |
Desalination pumps, marine components |
Super duplex steel races + Al₂O₃ coating |
Ⅳ、Technical Selection Guidelines
1. Precision Grade Comparison Table
|
ISO Standard |
ABEC Standard |
Radial Runout（μm） |
Application Scenarios |
|
P0 |
ABEC1 |
≤15 |
General Machinery |
|
P6 |
ABEC3 |
≤8 |
Industrial Motors |
|
P5 |
ABEC5 |
≤5 |
Precision Instruments |
|
P4 |
ABEC7 |
≤3 |
High-Speed Spindles/Medical Devices |
Ⅴ、Maintenance & Lubrication Guidelines
1. Lubricant Selection Guide
|
Operating Conditions |
Recommended Lubricant |
Replacement Interval |
|
Normal Temperature & Dry Environments |
PTFE-based full synthetic grease |
2 years / 5,000 hours |
|
High-Temperature Environments（<300℃） |
Polyurea-based high-temperature grease 1 |
1 year / 2,000 hours |
|
Wet/Water-Exposed Environments |
Waterproof silicone grease |
6 months / 1,000 hours |
2. Installation Precautions
o Use thermal mounting method (heat races to 150-200℃)
o Never hammer ceramic balls directly
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