Name: No magnetic silicon nitride ceramic roller for bearing with very lower price
Brand: SINOMA
Availability: InStock

Product Details

1.Pictures of product

2.Descriptions of product

Advantage:

1.Manufacture silicon nitride rollers from 1995.

2.The rollers are made by Europen silicon nitride powder.

3.Excellent and stable quality.

4.Plenty of stocks.

Materia:silicon nitride

Precision:G1-G2,with different gauge

Idear products for bearing and chemical industry,and other rolling condition

Characteristics of silicon nitride rollers:

1. High corrosion resistance, which means they can be also used in strong acid, strong alkali and seawater.

2. High temperature resistance. Si3N4 ceramic rollers remain the same strength and hardness even in 1100°C.

3. Electrical insulation, non-magnetic, they can also be used in magnetic field.

4. Si3N4 ceramic rollers have a low density of 3.26g/cm3. It is approximately 60% lighter than steel rollers, which extremely decrease the centrifugal force on the groove, in order to effectively reduce the wear and tear.

5. High rigidity and strength. Compared with chrome steel, Si3N4 ceramic is twice higher in hardness and half higher in elastic modulus value.

6. The coefficient of thermal expansion of Si3N4 is nearly 25% of the chrome steel, which leads to a good thermal shock resistance.

7. The self-lubrication of Si3N4 ceramic roller bearings can help to solve the contamination and inconvenient caused by lubricator, it can also be used in vacuum and high temperature.

8. Low thermal conductivity.

Silicon Nitride Material Properties

Performance Comparison of Structural Ceramics and Ordinary Steel

Specification of silicon nitride rollers

Length-Diameter aspect ratio (L/D) Unit:mm

Dia 3-5 L/D≤2

Dia 5-10 L/D≤3

Dia 10-45 L/D≤4

Diameter and Roundness Unit:μm

Grade	Dia		Lot Dia Variation V DWL Max	Roller Diameter Gauge Interval	Preferred Gauges	ΔCir Max
	From	To
0	3	18	1	1	-10,…,-1 0 +1,…,+5	0.3
0	18	30	1	1	-10,…,-1 0 +1,…,+5	0.4
I	3	18	2	1	-10,…,-1 0 +1,…,+5	0.4
I	18	30	2	1.5	-10.5,…,-1.5 0 +1.5,…,+6	0.5
II	3	18	3	1	-10,…,-1 0 +1,…,+5	1.0
II	18	30	3	1.5	-19.5,…,-1.5 0 +1.5,…,+6	1.5
II	30	45	3	2	-20,…,-2 0 +3,…,+6	2.5

Length Unit:μm

Grade	Length		Lot Length Variation V LWL Max	Roller Length Gauge Interval	Preferred Gauges	SDw Max
	From	To
0	3	26	6	6	-30,…,-6 0	3
0	26	50	6	6	-30,…,-6 0	3
I	3	26	10	6	-30,…,-6 0	5
I	26	50	10	10	-40,…,-10 0	5
II	3	26	14	6	-30,…,-6 0	6
II	26	50	14	10	-40,…,-10 0	6
II	50	80	14	12	-48,…,-12 0	6

Surface Roughness Unit:μm

Grade	Rolling surface Ra Max	End Face	Chamfer Angle

0	0.1	0.125	1.25
I	0.25	0.16	1.25
II	0.16	0.25	2.5

3.Production line of product

4.Packaging of product

5.Fair

We have been to a lot fairs and the lastest fair is 2015 HANNOVER MESSE Gemany.

6.Information of company

Founded in 1963, Beijing Sinoma Synthetic Crystals Co, LTD.Is a hi-tech state enterprise, belongs to the China National Materials Group Co., Ltd. An excellent technical team headed by the state-level experts has built up,which provides a reliable guarantee for the continuous and rapid technological development.

Advanced ceramic Division (technical center of precision ceramic bearing) is mainly engaged in researching,manufacturing and developing advanced ceramic materials such as Si3N4, ZrO2, Al2O3 and so on.

Main Products:

1). Si3N4 and ZrO2 ceramic balls and rollers.

2). Si3N4 ceramic bearing rings.

3). The whole series full ceramic bearings, hybrid bearings, sliding bearings and shaft sleeves made by Si3N4 and ZrO2 materials.

4). Industrial wear parts made by Si3N4 and ZrO2 materials. According to customer’s application condition and drawings, varios precise and irregular ceramic parts can be designed and fabricated

7.Welcome to contact us