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- Miniature bearing without flanged
- Metric Series
- With Shield/seal
- Without shields
- Inch Series
- With shield/seal
- without shields
- Flanged miniature bearing(with flanged)
- Metric Series
- With Shield/seal
- Without shields
- Inch Series
- With Shield/seal
- Without shields
- Thrust ball bearing
- With grooved
- Without grooved
- Ceramic bearing
- Hybrid Ceramic Bearing
- Full ceramic bearing
- ceramic balls
- One way bearing(needle bearing)
- Size List
- Samples Show
- Special bearing including engine bearing
- Spherical plain bearing
- China Dental hand piece bearing
- Flanged Dental Bearings
- Smooth Dental Bearings
- Grooved Dental Bearings
- Rc Hobby Fastener
- PACKING
- Normal industrial packing
- Customers' packing
- PMB packing
- HOT PRODUCTS
- BORE 4
- BORE 5
- BORE 6
- BORE 8
- BORE 7
- BORE 9
- Inch
- Open
- Flanged (open)
- Inch (open)
- Flanged
Ceramic Balls Desctription:
We are special in making Silicone Nitride Balls (Si3N4 Balls,Zicronia Balls (ZrO2 Balls),Sic Ceramic Balls , Aluminum Oxside Valve (AI203) ceramic balls.
The Characteristic of Ceramic Balls
Compared with steel, ceramic materials are noted for their better or particular characters, such as wear-resistance, corrosion resistance, high temperature resistance, electrical insulation (except SiC), non-magnetic, high strength, high rigidity, and low specific gravity. These properties qualify them for replacing steel to make bearings serve in conditions of higher speed, harsh environment and less lube, and decrease wear, noise, vibration and maintenance time of bearings, and eventually increase performance, reliability and life of bearings.
Ceramic materials, which can be used in making bearings, include mainly silicon nitride, ZrO2, alumina (Al2O3), and silicon carbide . Si3N4 is first choice within the above mentioned ceramic materials due to its excellent characters (Table 1). And a properly engineered silicon nitride bearing ball fails in the same manner as a steel ball, flaking of the ball surface. But ZrO2, Al2O3 and SiC fail in a crush form, a catastrophic failure.
The grades of ceramic balls (GB308-2002 ISO3290-1998)
|
Grade |
Allowable ball diameter variation ( um) |
Allowable deviation from spherical form ( um) |
Surface roughness (Ra, um) |
|
3 |
0.08 |
0.08 |
0.010 |
|
5 |
0.13 |
0.13 |
0.014 |
|
10 |
0.25 |
0.25 |
0.020 |
|
16 |
0.40 |
0.40 |
0.025 |
|
20 |
0.50 |
0.50 |
0.032 |
|
24 |
0.60 |
0.60 |
0.040 |
|
28 |
0.70 |
0.70 |
0.050 |
|
40 |
1.00 |
1.00 |
0.060 |
|
60 |
1.50 |
1.50 |
0.080 |
Application Fields of ceramic balls:
BEARING
Wheel & caster
High vacuum field
Roller skates, aeromodellings and motor-driven toys, etc in civil use
RC MODEL/RC HELICOPTER/RC BOAT
Aviation and airspace fields
The main shaft of machine tools