Ruby Balls

Ruby Balls from Goodfellow feature high-precision polished ruby spheres available in 20 variations. These precisely crafted balls exhibit excellent hardness, chemical resistance, and optical properties. Potential applications for Ruby Balls include instrument bearings and laser optics.. With their superior physical characteristics and precision manufacturing, Goodfellow's Ruby Balls offer exceptional performance across a variety of scientific, industrial, and commercial uses.

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Tolerance

Properties

Reference & Citations

each

Price

Action

1000001988

0.5mm

10 piece

1000004239

1.5mm

10 piece

1000010010

0.3mm

10 piece

1000010025

1mm

10 piece

$197.28each
5+ for $159.80ea
10+ for $145.99ea

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$206.33each
5+ for $167.13ea
10+ for $152.69ea

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$193.66each
5+ for $156.87ea
10+ for $143.31ea

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$200.90each
5+ for $162.73ea
10+ for $148.67ea

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larger quantities

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Tolerances

Ball/Sphere

Diameter	Standard	±5%
Diameter	Precision	See Item

Material Properties for Ceramics

Chemical Resistance

Element	Value
Acids - concentrated	Good
Acids - dilute	Good
Alkalis	Good
Halogens	Good
Metals	Good

Electrical Properties

Element	Value
Dielectric constant	7.5-11.5
Dielectric strength( kV mm⁻¹ )	15-50
Volume resistivity( Ohmcm )	10¹⁴@25

Physical Properties

Element	Value
Useful optical transmission range	150-5500nm
Apparent porosity( % )	0
Water absorption - saturation( % )	0
Density( gcm⁻³ )	3.98

Thermal Properties

Element	Value
Melting point( C )	2050
Upper continuous use temperature( C )	1800-1950
Specific heat( J K⁻¹ kg⁻¹ )	750@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	35-40@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	5.8@20-1000°C