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Silicon Nitride Balls (Si3N4)


These high performance ceramic balls are produced by us from Toshiba's revolutionary ceramic material - TSN-03NH - which is certified to meet ASTFM F2094 Class 1 requirements, the most rigorous industry classification for silicon nitride bearing materials in the world.

Only ceramic balls and rollers made of this material are approved for use in the Space Shuttle.


These balls benefit from high strength, high resistance to abrasion, high stiffness and outstanding corrosion resistance to even very harsh chemicals and environments. They also have a 40% lower density than steel and weigh 60% less. They can operate perfectly in temperatures up to 800 degrees C, are whisper quiet and have a life expectancy up to 10 times longer than steel.

Use Cases

You'll find them in machining tools, spindle motors, fuel injection systems, dentist drills, chemical plant equipment, heat treatment furnace parts, electric motors and in turbo pumps on the aforementioned Space Shuttle.

Comparison of TSN-03NH with ASTM F2094

PropertiesMethodUnitMaterial ClassTSN-03NH (Average level)
3 point (Mean)MPa9008006001100
Flexural StrengthWeibull modulus129720
Fracture ToughnessIndentation Fracture Resistance, IE??RMPa√m≥6.0≥5.0≥5.07
Porosity SizeSEM or Microscopeμm≤10≤10≤25<1
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Our Quality Guarantee

Accuracy is our trademark at TN UK. We pride ourselves on our ability to measure and calibrate the products we manufacture. Housing some of the most sophisticated equipment in the world, our annually assessed UKAS lab means we guarantee the precision of the products we supply.

On top of that, we maintain regular and open communication directly with you and any relevant departments to ensure that you get exactly what you need when you need it.

We also offer a recalibrate service for your existing gauges, CMM Reference balls and Master Ball Sets. So you can rest assured that, whether we are supplying a new product or recalibrating an existing one, by meeting our strict standards, your company meets its strict standards (particularly important for other calibration assessed companies).



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