Acrylic - Materials - Technical
- from Small Parts and Bearings
Acrylic - Polymethylmethacrylate (PMMA)
SPB Products made from this material
Balls
Properties of Polymethylmethacrylate
Physical Properties | ||
PROPERTY | UNIT | VALUE |
Density | g/cm3 | 1.19 |
Surface Hardness | Rockwell M | 92-100 |
Tensile Strength | MPa | 80 |
Tensile Modulus | GPa | 2.4-3.3 |
Izod Impact Strength | J m-1 | 16-32 |
Elongation at Break | % | 2.5-4 |
Max Operating Temp. | oC | 85 |
Water Absorption | % | 0.2 Over 24 Hours |
Flammability | UL94 | HB |
Volume Resistivity | ohm.cm | 2-14x1015 |
Dielectric Strength | kV/mm-1 | 15 |
Dissipation Factor | @ 1MHz | 0.014 |
Dielectric Constant | @ 1MHz | 2.6 |
Heat Deflection Temp. @ 0.45 MPa | oC | 105 |
Heat Deflection Temp. @ 1.80 MPa | oC | 95 |
Chemical Resistance | ||
Chemical | Resistance | |
Acids (Concentrated) | Poor-Good | |
Acids (Dilute) | Poor-Good | |
Alcohols | Poor-Good | |
Alkalis | Good | |
Aromatic hydrocarbons | Poor | |
Greases and Oils | Good | |
Halogenated Hydrocarbon | Poor | |
Halogens | Poor | |
Ketones | Poor |
Note! Property values are typical and should be used only as a guide to selection of materials and not as purchase specifications.
You can find PMMA products online at Small Parts and Bearings PMMA Online Catalogue pages.
For a huge range of bearings online please visit the Bearing Shop Online Website.
Hobby and Engineering Supplies lists a smaller range of products and only the most popular items in each range. They also list many additional hobby specific categories.
For the best range of miniature and small bearings please try the Miniature Bearings Australia website. Miniature Bearings Australia also list a large variety of miniature engineering products.
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