PTFE Balls

PTFE Balls are an engineered plastic product from Goodfellow, available in 5 variations. These polytetrafluoroethylene (PTFE) balls exhibit excellent chemical resistance, high temperature resistance, low friction, and electrical insulating properties. PTFE balls find use across scientific and industrial applications including bearings, valves, and seals where lubricity, chemical inertness, and heat resistance are required.

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Tolerance

Properties

Reference & Citations

each

Price

Action

1000061174

1.59mm

50 piece

1000075505

3.18mm

10 piece

1000113096

1.59mm

100 piece

1000113100

3.18mm

100 piece

$162.89each
5+ for $131.94ea
10+ for $120.54ea

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POA

POA
Contact Sales

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

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$208.14each
5+ for $168.60ea
10+ for $154.03ea

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Tolerances

Ball/Sphere

Diameter	Standard	±5%
Diameter	Precision	See Item

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Good
Acids - dilute	Good
Alcohols	Good
Alkalis	Good
Aromatic hydrocarbons	Good
Greases and Oils	Good
Halogenated Hydrocarbons	Good
Halogens	Good
Ketones	Good

Mechanical Properties

Element	Value
Coefficient of friction	0.05-0.2
Hardness - Rockwell	D50-55 - Shore
Poisson's ratio	0.46
Elongation at break( % )	400
Tensile modulus( GPa )	0.3-0.8
Izod impact strength( J m⁻¹ )	160
Tensile strength( MPa )	Oct-40

Electrical Properties

Element	Value
Dielectric constant @1MHz	2-2.1
Dissipation factor @ 1MHz	0.0003-0.0007
Dielectric strength( kV mm⁻¹ )	50-170
Surface resistivity( Ohm/sq )	10¹⁷
Volume resistivity( Ohmcm )	10¹⁸-10¹⁹

Physical Properties

Element	Value
Flammability	V0
Radiation resistance	Poor
Refractive index	1.38
Resistance to Ultra-violet	Excellent
Limiting oxygen index( % )	95
Water absorption - over 24 hours( % )	0.01
Density( gcm⁻³ )	2.2

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	120
Heat-deflection temperature - 1.8MPa( C )	54
Lower working temperature( C )	-260
Upper working temperature( C )	180-260
Specific heat( J K⁻¹ kg⁻¹ )	1000
Thermal conductivity( W m⁻¹ K⁻¹ )	0.25@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	100-160