High Quality Si3n4 Silicon Nitride Grinding Balls

Material: Ceramics
Content: >90%
Usage: Grind
Processing Type: Isostatic Pressing Type
Size: Dia.2mm-40mm
Color: Others

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Basic Info.

Model NO.
XTS001
Customized
Non-Customized
Tolerance
+/-0.001mm
Metals/ Materials
Tungsten Carbide, Silicon Nitride, Silicon Carbide
Grain Size
Ultra Fine,Extra Fine
Transport Package
Carton
Specification
SGS
Trademark
Sintec
Origin
Zhuzhou
HS Code
8466910000
Production Capacity
5000

Product Description

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.

Welcome to inquiry, welcome drawings, best offers for you. 

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