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Static Friction Calculator

Static Friction Coefficient:
Normal Force:
Static Friction:
     


NOTE: Static Friction Coefficient is dimensionless.

Static friction is the force between two objects that are not moving relative to each other.

Static friction calculation formula:
  static friction = static friction coeffient * normal force


Static Friction Coefficient Table


MATERIALS
Coefficient Of Friction
Dry and Clean
Greasy
Static
Sliding
Static
Sliding
Aluminum Aluminum
1.05-1.35
1.4
0.3
Aluminum Mild Steel
0.61
0.47
Brake Material Cast Iron
0.4
Brake Material Cast Iron (Wet)
0.2
Brass Cast Iron
0.3
Brick Wood
0.6
Bronze Cast Iron
0.22
Bronze Steel
0.16
Cadmium Cadmium
0.5
0.05
Cadmium Mild Steel
0.46
Cast Iron Cast Iron
1.1
0.15
0.07
Cast Iron Oak
0.49
0.075
Chromium Chromium
0.41
0.34
Copper Cast Iron
1.05
0.29
Copper Copper
1.0
0.08
Copper Mild Steel
0.53
0.36
0.18
Copper-Lead Alloy Steel
0.22
-
Diamond Diamond
0.1
0.05 - 0.1
Diamond Metal
0.1 -0.15
0.1
Glass Glass
0.9 - 1.0
0.4
0.1 - 0.6
0.09-0.12
Glass Metal
0.5 - 0.7
0.2 - 0.3
Glass Nickel
0.78
0.56
Graphite Graphite
0.1
0.1
Graphite Steel
0.1
0.1
Graphite (In vacuum) Graphite (In vacuum)
0.5 - 0.8
Hard Carbon Hard Carbon
0.16
0.12 - 0.14
Hard Carbon Steel
0.14
0.11 - 0.14
Iron Iron
1.0
0.15 - 0.2
Lead Cast Iron
0.43
Leather Wood
0.3 - 0.4
Leather Metal(Clean)
0.6
0.2
Leather Metal(Wet)
0.4
Leather Oak (Parallel grain)
0.61
0.52
Magnesium Magnesium
0.6
0.08
Nickel Nickel
0.7-1.1
0.53
0.28
0.12
Nickel Mild Steel
0.64;
0.178
Nylon Nylon
0.15 - 0.25
Oak Oak (parallel grain)
0.62
0.48
Oak Oak (cross grain)
0.54
0.32
0.072
Platinum Platinum
1.2
0.25
Plexiglas Plexiglas
0.8
0.8
Plexiglas Steel
0.4 - 0.5
0.4 - 0.5
Polystyrene Polystyrene
0.5
0.5
Polystyrene Steel
0.3-0.35
0.3-0.35
Polythene Steel
0.2
0.2
Rubber Asphalt (Dry)
0.5-0.8
Rubber Asphalt (Wet)
0.25-0.0.75
Rubber Concrete (Dry)
0.6-0.85
Rubber Concrete (Wet)
0.45-0.75
Saphire Saphire
0.2
0.2
Silver Silver
1.4
0.55
Sintered Bronze Steel
-
0.13
Solids Rubber
1.0 - 4.0
--
Steel Aluminium Bros
0.45
Steel Brass
0.35
0.19
Steel(Mild) Brass
0.51
0.44
Steel (Mild) Cast Iron
0.23
0.183
0.133
Steel Cast Iron
0.4
0.21
Steel Copper Lead Alloy
0.22
0.16
0.145
Steel (Hard) Graphite
0.21
0.09
Steel Graphite
0.1
0.1
Steel (Mild) Lead
0.95
0.95
0.5
0.3
Steel (Mild) Phos. Bros
0.34
0.173
Steel Phos Bros
0.35
Steel(Hard) Polythened
0.2
0.2
Steel(Hard) Polystyrene
0.3-0.35
0.3-0.35
Steel (Mild) Steel (Mild)
0.74
0.57
0.09-0.19
Steel(Hard) Steel (Hard)
0.78
0.42
0.05 -0.11
0.029-.12
Steel Zinc (Plated on steel)
0.5
0.45
-
-
Teflon Steel
0.04
0.04
0.04
Teflon Teflon
0.04
0.04
0.04
Tin Cast Iron
.32
Tungsten Carbide Tungsten Carbide
0.2-0.25
0.12
Tungsten Carbide Steel
0.4 - 0.6
0.08 - 0.2
Tungsten Carbide Copper
0.35
Tungsten Carbide Iron
0.8
Wood Wood(clean)
0.25 - 0.5
Wood Wood (Wet)
0.2
Wood Metals(Clean)
0.2-0.6
Wood Metals (Wet)
0.2
Wood Brick
0.6
Wood Concrete
0.62
Zinc Zinc
0.6
0.04
Zinc Cast Iron
0.85
0.21

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