Spherical Mass Set – mini launcher
This spherical mass set includes three balls with a diameter of 16 mm each, but featuring various masses based on material of differing specific gravity and fine tolerance diameters so mass can be varied.
Includes one each of delrin (1.42 g/mL), crystal acrylic (1.19 g/mL) and a polypropylene (0.90 – 0.93 g/mL) 15.875 mm (0.625”) balls
The balls can be identified by mass. By colour
Delrin: Off white
Polypropylene: Translucent
Crystal acrylic: Clear
Material specifications
Delrin
Specific Gravity 1.42 g/mL
Mass approximately 2.8 – 3.0 g
Melting Point 352 F / 178 C
Hardness, Rockwell 120
Heat Deflection Temperature 250 F / 121 C
Tensile Strength 11,000 psi
Water Absorption 24 hr .2%
Compressive Strength 16,000 psi
Flammability UL94 HB
Flexural Strength 12,000 psi
Crystal acrylic
Specific Gravity 1.19 g/mL
Mass approximately 2.4 – 2.6 g
Water Absorption .60%
Hardness, Rockwell M80 – M100
Vicat Softening Point 201 F / 94 C
Tensile Strength 8120 psi
Flammability UL94 HB
Melting Point 300 F / 150 C
Visible Transmission 92%
Heat Deflection Temperature 169 F / 76 C
Refractive Index 1.49
Polypropylene
Specific Gravity 0.90 – 0.93 g/mL
Mass approximately 1.8 – 2.0 g
Max Operating Temperature 180 F / 82 C
Hardness, Rockwell 92 – 117
Heat Deflection Temperature 210 F / 99 C
Tensile Strength 4800 psi
Water Absorption 24 hr .01%
Compressive Strength 5000 psi
Dielectric Constant 2.25
Flexural Strength 7000 psi
Flammability UL94 HB
Melting Point 327 F / 164 C