Product Description

Si3N4 Full Ceramic Bearings PTFE or PEEK Cage

As the professional manufacturers, Top Bearings would like to provide you high quality Si3N4 Full Ceramic Bearings PTFE or PEEK Cage. And we will offer you the best after-sale service and timely delivery.

Si3N4 Full Ceramic Bearings PTFE or PEEK Cage have some better performance than ZrO2, the rings and balls made by full ceramic material: Si3N4, as a standard contracture, the cage made by PTFE, generally we also could make the cage with GFRPA66-25,PEEK,PI, Phonemic Textiles Tube ,etc. Compares than the material of ZrO2, Si3N4 Full Ceramic Bearings PTFE or PEEK Cage could endure heavier load and could be used in higher temperature environment. Also we could offer precision ceramic bearing which generally used in high-speed and high-rigidity spindle. The manufactured clearance could be P4 to UP grade.

Material:	Si3N4 Ceramic Material	Density:	3.2 G/cm3
Material Of Rings & Balls:	Full Si3N4 Ceramic Material	Almost Material Of Cage:	PTFE
Other Material Of Cage:	GFRPA66-25, PEEK, PI, Phonemic Textiles Tube ,etc.	Application Temperature:	1000℃
High Light:	rod end bearing, plain bearing bush

Comparison of bearing material technical data

Technical data	unit	GCr15	9Cr18	Si3N4	AL203	ZrO2
Density	g/cm³	7.8	7.9	3.2	3.95	6
a Coefficient of expansion	10^-6/℃	11	17	3.2	9.1	10.5
E modulus of elasticity	Gpa	208	200	320	380	210
μ Poisson ratio		0.3	0.3	0.26	0.27	0.3
HV Hardness		800	700	1700	1800	1300
δ Flexural strength	Mpa	2400	2600	900	220	1000
δ Compressive Strength	MPa			2000	1500	3500
Kc Impact strength	Nm/cm²	20	25	7	3.5	11
λ Thermal conductivity	W/mk	30-40	15	3.5	25	2.5
Ω Specific resistivity	mm²/m	1	0.75	10^18	10^8	10^5
Specific heat	J/KgK	450	450	800	880	400
Application temperature	℃	120	150	1000	1850	800
Anti-corrossion		No	poor	Good	Good	Good
Cycle stress		10*10^6	10*10^6	50*10^6	30*10^6	50*10^6
Destroy model		peel	peel	peel	fracture	peel/fracture
Anti-magnetism		Yes	Yes	No	No	No
Dimension stability		bad	poor	Good	Good	Good
Insulate properties		No insulation	No insulation	Good	Good	Good

Basic properties of staple engineer plastic

Material	HDPE	PP	POM	PA66	PVDF	PPS	PTFE	PEEK
Long-time working temp.	90	100	110	100	150	230	260	280
Density	g/cm3	0.91	1.42	1.14	1.77	1.35	2.18	1.32
Ball indentation hardness	50	80	170	170	80	190	30
Tensile stress	25	30	70	80	50	75	25	95
Sliding friction coefficient	0.29	0.3	0.34	0.35-0.42	0.3		0.08-0.1	0.3-0.38
Melted temperature	130	165	175	260	172	280	327	343
Short-time highest application temperature	90	140	150	170	150	260	260	300
Coet of Inear expansion (10^-5/K)	13-15	17	10	8	13	5	12	5
Dielectric constant at 1 Mhz(10^6HZ)	2.4	2.25	3.7	3.6-5	8		2.1	3.2-3.3
Volume resisrivity (Ω·cm)	>10^15	>10^24	>10^14	10^13	10^12	>10^13	10^14	10^13
flammability UL94	+	+	-	(+)	(+)	-	+	+
Anti-weathering	-	-	-	-	-	-	+	-
Note: + =resistant; (+) =partly resistant; - =non-resistant

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