Ceramic Silicon Nitride Outer Ring With V Groove Pulley

Full Ceramic Silicon Nitride Outer Ring With V Groove Pulley bearings can be made in silicon nitride, zirconia or silicon carbide, three kinds in total. You can find those ceramic materials' characteristic at ceramic materials and their properties.

 

TECHNICAL SPECS

 

Material Silicon Nitride (Si3N4)
Size 5x30x15mm
Accuracy 0.008mm
Highest Temperature 800℃(1472F)
Circular Runout 12um
Perpendicularity 12um
Circularity 10um
Parallelism 12um
Applications Wire and cable production industry, wire drawing machine. Strong wear resistance, high hardness, long life. Pulled copper wire is smoother

 

 

MATERIAL PROPERTIES

 

Performance unit Si3n4
Ingredients Aluninum (Al)              2.0~3.5%
Yttrium (Y)              4.0~5.0%
Titanium (Ti)              1.0~1.5%
Oxygan (O)              4.5~6.0%
Carbon(C)             0.3~0.8%
Other impurities less than 0.1%
The rest is silicon nitride
Density g/cm3 ≥3.20
Hardness Hv 1400~1600
Bending strength Mpa >800
Compressive strength Mpa >4000
Elastic Modulus Gpa 300~315
Fracture toughness Mpa.m1/2 6~8
Cofficient of thermal expansion 10-6/℃ 2.2~3.0
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