High Precision And Mini size Full Ceramic Bearings ZrO2 Or Si3N4

Product Details:

Place of Origin:	China
Brand Name:	TOB Ceramic Bearings
Certification:	ISO 16949

Payment & Shipping Terms:

Minimum Order Quantity:	negotiated
Price:	negotiated
Packaging Details:	Cartons or Pallets
Delivery Time:	negotiated
Payment Terms:	T/T
Supply Ability:	negotiated

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Detailed Product Description

Material:	ZrO2 Or Si3N4 Etc.	Almost Material Of Cage:	PTFE Material
Other Material Of Cage:	GFRPA66-25, PEEK, PI, AISI SUS304, SUS316, Cu, Etc.	Density:	ZrO2 Is 6g/cm3, Si3N4 Is 3.2g/cm3
Cycle Stress:	50*10^6	Application Temperature:	1000℃
High Light:	full ceramic bearings , ceramic balls for bearings

High Precision And Mini-size Ceramic Bearings

With widely using of the ceramic bearings in all kinds of industries, they have the different requirements of frame, category, material, and precision of the ceramic bearings. During the production, the requirements need to be improved by a long experiment, but on the small type (inner diameter less than 10mm), the precision of product is hard to meet the requirement of customers by the routine processing craft.

According to above problem, we have an adjustment of the manufacturing machine and processing craft. We use a new processing craft aiming at the ceramic bearing whose inner diameter less than 10mm, and purchase the new processing machine, which insure the production of the high precision and mini-size ceramic bearing from the hardware.

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