Gray Ceramic Balls for High-Speed Bearings

Product Description

Company Profile

SiC ceramic balls

Ceramic bearings are often extremely resistant to corrosion and require very little lubrication in systems such as automotive
engines and gears. They also typically have very high temperature resistance and can handle acidic and alkaline environments.

Compared with steel, its mass is lighter than steel, its friction coefficient is smaller, its motion performance is better, its elastic modulus is 50% larger than that of steel, its thermal expansion coefficient is smaller than 25% of that of steel, it can maintain high strength and hardness before 1000℃ under high temperature, and it is resistant to corrosion. No rust, non-magnetic, can work without oil
lubrication.

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	ZrO2 Zirconia Ceramic Balls	Si3N4 Silicon Nitride Ceramic Balls	SiC Silicon Carbide Balls	Al2O3 Aluminum Oxide Ceramic Balls
Material	Zro2	Si3N4	SiC Silicon Carbide	Al2O3 Aluminum Oxide
Specifications	φ0.1mm-φ63.5mm	φ0.4mm-φ100mm	φ0.5mm-φ50mm	Ceramic grinding media
Hardness	HRC70-HRC73.HV.1100-1300	HRC75-80.HV:1300-1600	HRC85-90 HV: above 2100	>92 Al2O3
Density	6g/cm3	3.2g/cm3	3.1g/cm3	>3.60
Performance	1. High strength and high toughness, no broken beads under high-speed impact. 2. Good sphericity and smooth surface. 3. Ultra-low wear, wear resistance is 30-50 times that of glass beads, 5 times that of zirconium silicate beads, and 6-8 times that of alumina beads. 4. High density and high grinding efficiency.	1.59% lighter than steel balls, which means less centrifugal force and wears less grooves at high speeds and accelerations 2. The elastic modulus is 44% larger, which means less deformation under load. 3. Smaller friction coefficient. 4. The linear expansion coefficient of silicon nitride ceramic ball is 3.2×10-6/K, which is almost 1/4 of bearing steel, and can endure high temperature. 5.Excellent surface finish can be achieved, Ra can be 4~6. 6. Can endure high temperature, high hardness and strength up to 1050 ℃.	Silicon carbide ceramic balls have stable performance, and silicon nitride has good overall performance. Compared with steel, its mass is lighter than steel, its friction coefficient is smaller, its motion performance is better, its elastic modulus is 50% larger than that of steel, its thermal expansion coefficient is smaller than 25% of that of steel, it can maintain high strength and hardness before 1000℃ under high temperature, and it is resistant to corrosion. No rust, non-magnetic, can work without oil lubrication.	1. High wear-resisting: The alumina balls wear resisting is higher than the common ceramic balls. When it is working, the ball will not pollute the grinded materials, so it can keep the purity and improve the stability of grinded materials especially the ceramic glaze. 2. High density: the high density, high hardness and the high grinding Characters save the grinding time, enlarge the smashing room. So It can improve the grinding efficiency.
Application	Special bearings, pumps and valves that operate in aggressive environments, check valves, flow meters, measurement instruments. They are used in the medical field (very pure material). Grinding and milling applications.	Special bearings, high-speed bearings, under vacuum pumps, compressors, centrifugal pumps, shafts/mandril, recirculating balls, flow meters, measurement instruments. They are used in aerospace.	Including Special bearings and pumps, electric switches and sensors, medical instruments. They are used in automotive, aviation and aerospace, naval, petroleum, chemical and electronic industry. Spray nozzles, shot blast nozzles and cyclone components.	Ceramics, cements, paints, refractory, inorganic mineral powders and other materials to form. Special bearings, check valves, pumps and valves that operate in aggressive environments, petroleum pumps, flow meters, measurement instruments, medical devices.

Certifications

Grade: G10 to G1000
Grade	ball diameter	spherical	surface	lot diameter	nomainal ball
	variation	deviation	roughness	variation	deviation tolerance
	Vdws	Sph	Ra	Vdwl	Tdn
	not over
	μm
10	0.25	0.25	0.02	0.5	*
16	0.4	0.4	0.025	0.8	*
20	0.5	0.5	0.032	1	*
24	0.6	0.6	0.04	1.2	*
28	0.7	0.7	0.05	1.4	*
40	1	1	0.06	2	*
60	1.5	1.5	0.08	3	*
100	2.5	2.5	0.1	5	±12.5
200	5	5	0.15	10	±25
500	12.5	12.5	*	25	±50
1000	25	25	*	50	±125

Packing & Delivery

FAQ

This street light features high brightness, energy saving, environmental protection, and easy 

1.Q: Can you provide free sample?
Yes, we can offer you free sample when we have them in stock and you just need to pay the shipping fee.

2.Q: What's the terms of payment?
T/T, Trade Assurance order , Western Union or Cash.

3.Q: What the certification do you have?
ISO 9001,IATF 16949,ROHS,SGS,BV.

4.Q: What is the lead time?
Balls in stock could be delivered within 3-5 days once confirmed the order.
For mass order or customized products, it takes about 20-30 days.

5.Q: What's your advantage? Why we choose you?
1) More than 30 years balls manufacture experience.
2) Great production capacity Sustainable Supply. According to customer requirements. We support the customized products including
package.
3) Large stock and wide size range.