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Friction Coefficient Reference Table

Material Material Static Dynamic
1 2 Dry and clean Lubricated Dry and clean Lubricated
Aluminum Aluminum 1.05-1.35 0.3 1.4-1.5
Cast Iron Brass 0.28
0.3
Cast Iron Bronze 0.21
0.22 0.07-0.08
Cast Iron Cast Iron 1.1 0.08 0.15 0.06-0.1
Cast Iron Copper 1.05
0.29
Cast Iron Wood 0.485 0.8 0.3-0.5
Cast Iron Zinc 0.85
0.21
Concrete Rubber 1.0 0.3-0.8 0.6-0.85 0.45-0.75
Concrete Wood 0.62
Copper Copper 1.0 0.08
Copper Glass 0.94
Glass Glass 0.9-1.0 0.1-0.6 0.4
Glass Metal 0.5-0.7 0.2-0.3
Glass Rubber >2.0 2.0
Steel Aluminum 0.61 0.47
Steel Brass 0.35-0.51 0.19 0.44
Steel Cast Iron 0.4 0.21

Steel Copper 0.53 0.36 0.18
Steel Graphite 0.1 0.1
Steel Polythene 0.2 0.2
Steel Polystyrene 0.3-0.35 0.3-0.35
Steel Rubber 0.64-0.86
Steel Steel 0.74-0.80 0.16-0.2 0.42-0.62 0.03-0.19
Steel Teflon (PTFE) 0.04 0.04
Teflon (PTFE) Teflon (PTFE) 0.05-0.2 0.04
Wood Metal 0.2-0.6 0.2
Wood Wood 0.25-0.5 0.2
Zinc Zinc 0.6 0.04

Rolling Friction Coefficient
Material
Car tires on concrete, new asphalt 0.01-0.015
Car tires on tar or asphalt 0.02-0.035
Car tires on cobbles (new - worn) 0.01-0.03
Car tires on gravel (new - worn) 0.02-0.08
Car tires on solid sand 0.04-0.08
Car tires on loose sand 0.2-0.4
Bicycle tires on concrete 0.002
Bicycle tires on asphalt road 0.004
Bicycle tires on rough paved road 0.008
Bicycle tires on wooden track 0.001
Truck tires on asphalt 0.006-0.01
Railroad steel wheels on steel rails 0.001 - 0.002
Source: Engineering Toolbox