High Precision Silicon Carbide Balls

60% lighter than steel balls Up to 55% higher running speeds. Centrifugal forces reduced with 60% less rotating mass. Less rotating mass means faster acceleration and deceleration. Lower vibration levels results in finer surface finishes. Higher speedability with grease or oil lubrication. Lower starting torque loads. Reduced ball skid results in a "truer" running bearing. Less heat build up results in less friction and longer lubricant life. Dissipates heat quickly. 35% less thermal expansion 50% less thermal conductivity. Fatigue life increased. Corrosion resistant in harsh chemical atmospheres. Performs up to 15 times longer in poor lubrication environments as compared to steel. 50% higher modulus of elasticity (Resistance to denting) Improved spindle rigidity Naturally fatigue resistant Tribochemically inert Low adhesive wear Improved lubricant life Superior corrosion resistance Non-conductive Ceramic is a natural insulator, and is beneficial where electric motor design requires a high degree of electrical insulating properties between the armature and field windings. The service life of conventional steelball bearings in electric motors is sometimes reduced, due to pitting and corrosion caused by trace discharging, between the rings and balls. Ceramic hybrids do not suffer from this, due to their natural insulating properties. Due to their inherent longer service life, it results in a more reliable, and longer lasting product. Less maintenance Due to a minimum level of Adhesive Wear, bearing components and lubricants last much longer, saving you expensive service and repair time. High Hot Strength High compressive and flexural strength over a wide temperature range. Lends itself for use to 2200 degrees F. Low Density Specific density of 3.2 compared to 7.8 for steel. At high bearing operating speeds, the bearing balls have a centrifugal force which may exceed the external loads on the bearing. The low density of ceramics can reduce this load considerably. High Hardness While bearing steel is in the RC 58-64 hardness range, silicon nitride has a hardness of RC 75-80 and offers excellent wear resistance. Coefficient of Friction Silicon nitride has a coefficient of friction which is significantly lower, especially under marginal lubrication conditions. It also exhibits better resistance to scuffing and seizing than bearing steel. Corrosion Resistance Silicon nitride is unaffected by most common corrosive agents, and is well-suited for use in hot corrosive atmospheres, or where lubricants have been known to attack conventional bearing steels. Long Fatigue Life Recent improvements in purity and grain structure have given silicon nitride a high stress fatigue life equal to, or better than, that of bearing steels. Some tests have shown life 3 to 5 times that of M-50 steel. Low Coefficient of Thermal Expansion This property has made it difficult to mount a ceramic bearing on a steel shaft (which expands 3 times faster than ceramic). The steel shaft may crack a ceramic bearing "ring", due to the thermally induced tension stresses created in the ceramic ring. To date, the most promising use is with bearings using ceramic balls only. Mounting difficulties and manufacturing intricacies, with their associated high costs, have slowed acceptance and potential usage of the all-ceramic bearing. Hybrid bearing applications from small high-speed turbines to larger grease lubricated machine tool spindles have achieved good results and have been very successful.

Application
INDUSTRY

Great advantages are achieved with machine tool applications

	Grinding
	Milling
	Boring
	Drilling

Aircraft accessories/aerospace

	Generators
	Gyros
	Gearboxes
	APU's
	Turbine engines
	Radar
	Weapon Systems
	Satellites

Industrial Machinery

	Robotics
	Generators
	Electric Motors*
	Automated electronic assembly
	Turbomolecular pumps
	Diesel fuel injection pumps
	Textile machines
	Woodworking machinery
	Food processing equipment
	Drilling equipment
	Automotive
	Heavy Equipment

Medical equipment

	Dental drills
	Centrifuges
	X-ray tubes

*25% of all electrical energy produced is used to power some type of electric motor. Imagine the savings in resources if all motors were to run with ceramic hybrid ball bearings!
Ceramic Ball Bearing
1. What is the difference between Si3N4 and ZrO2 material?
Main Differences:
--Density: Si3N4 (3.2 g/cm3 ) Ceramic Bearing is lighter than ZrO2 ( 6g /cm3 )
--Using Temperature: Si3N4 1000°C, ZrO2 800°C
--Hardness: Si3N4 1700, ZrO2 1300.

2. What is the advantage using the ceramic bearing compare to standard steel bearings?
--Ceramic Ball Bearing can be in a high temperature(Si3N4 1000°C, ZrO2 800°C) working condition and dimention stability is very good. But stansard steel bearing can not work in a high temperature more than 200°C, and dimention stability is not good.
--Hardness: Si3N4 1700, ZrO2 1300, GCr15 800
--Corrossion Resistant: Ceramic Bearing is very very good and can work in a acid alkali environment. But standard steel bearings are always east to get rusty.
--Density: ceramic bearing is much lighter than steel bearings.
--Ceramic bearing : oilless self-lubrication


3. What condition/application does ceramic bearings are used?
---low density, strong solidity, low friction coefficient, abrasion resistance, magnetic resistance, acid and alkali environment, good resistance to wear and tear, electric insulation, self-lubrication.
---Electro plating, electro polishing ,Food processing, vacuum applications.Fiber processing, conveyor processing. Medical radiation, photo processing,Computer assembly, electronics applications, Medicine equipment, wet applications ,etc.

Maufacturing facility

Equipment: EDM machines, cutting machine and drilling, CNC machine, precision grinding machine etc.
Advanced production equipment and technical support, strict quality control, good service support help us to supply our clients with quality products and service.
If you are finding parts with, and if you'd customize special parts, Zhuzhou Sintec New Material Co., Ltd is your best choice!

We will be adhering to the idea of "quality products, quality service, good reputation", to establish firm friendly relationship with you.

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