PPS Bearing Grade vs PPS GF30
Polymer · PPS grade comparison
PPS Bearing Grade and PPS GF30 are two grades of the same polymer grade, PPS: Bearing Grade (PTFE / graphite / carbon lubricated PPS) versus GF30 (30% glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. PPS GF30 is the stronger of the two: tensile strength 150 MPa (21.8 ksi) against 85 MPa (12.3 ksi) for PPS Bearing Grade, about 76% more. PPS Bearing Grade is lighter (1.45 g/cm³ vs 1.56 g/cm³ for PPS GF30) and PPS GF30 is stiffer (11.5 GPa vs 6.5 GPa). On the shop floor, PPS Bearing Grade machines more easily (good vs fair).
PPS Bearing GradeChoose it when weight is the constraint, or when the part is machined in volume.
PPS GF30Choose it when strength drives the design.
PPS Bearing Grade vs PPS GF30: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Hardness, Rockwell M
Same in both: Shear Modulus 1.4 GPa0.2 Msi · Poisson's Ratio 0.37 · Yield Strength (0.2% offset) 75 MPa10.9 ksi · Compressive Modulus 3.5 GPa0.51 Msi · Shear Strength 65 MPa9.4 ksi · Hardness, Shore D 88 Shore D · Hardness, Rockwell R 123 HRR
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 280°C536 °F · Glass Transition (Tg) 88°C190 °F · Water Absorption (24 h) 0.03% · Water Absorption (Saturation) 0.1%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Same in both: Specific Heat Capacity 1,000 J/kg·K0.24 BTU/lb·°F · Max Service Temperature (continuous) 220°C428 °F · Min Service Temperature -40°C-40 °F · Limiting Oxygen Index 47% · Max Service Temperature (short-term) 260°C500 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Dielectric Strength 18 kV/mm457 V/mil · Dielectric Constant (1 MHz) 3.1 · Dissipation Factor (1 MHz) 0.0013 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 175 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 92 / 100 · UV / Weathering Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Weldability 30 / 100 · Formability (cold) 15 / 100 · Polishability 60 / 100 · Processing Melt Temperature (typ.) 320°C608 °F · Mold Temperature (typ.) 140°C284 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 115 MJ/kg49,441 BTU/lb · Embodied Carbon (primary production) 6.2 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 2%
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
PPS Bearing Grade vs PPS GF30 — frequently asked
Is PPS GF30 stronger than PPS Bearing Grade?
Yes. PPS GF30 has a typical tensile strength of 150 MPa (21.8 ksi) against 85 MPa (12.3 ksi) for PPS Bearing Grade — about 76% more.
Which grade does FabDigit quote by default, Bearing Grade or GF30?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, PPS Bearing Grade or PPS GF30?
PPS Bearing Grade. Its machinability rates good (62/100) against fair (45/100) for PPS GF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PPS Bearing Grade and PPS GF30 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.