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Which material (wood, cork, neoprene, silicon or leather) would produce the greatest force of friction, making it the most ideal prosthetic fingertip?

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How does mass affect different fingertip material?

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- Wood Block
- Spring Measure
- Coasters

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wood friction block, tape, flat table top, spring scale, leather coaster, cork coaster, wood coaster, neoprene coaster, silicon coaster.

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Table - 0.3N
Neoprene - 1.5N
Silicon - 0.95N
Cork - 0.6N
Wood - 0.15N
Leather - 0.2N

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1. Measure Wood Block With Spring
2. Measure With Different Materials

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We will tape each of the coasters to the table top (for silicon we put the matte side up and for neoprene we put the rubbery side up). Then, we will put the friction block on top and link the spring scale to the hook. We will carefully pull the spring scale, making note of the force applied in Newtons until the block is about to slip. We will write down the force in N applied on the block right before it slipped.

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Cork 2N
Neoprene 1.5N
Wood 1.5N
Leather 1.3N
Silicone 2.5N

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material    applied force     friction     mass
wood        3.8N                    0.24         1.6 kg
cork          8N                       0.51          1.6 kg
silicone     7N                       0.44         1.6 kg
neoprene  5.2N                   0.33          1.6 kg
leather 3.5N 0.22 1.6 kg

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Leather - 0.13N
Silicone - 0.4N
Neoprine (texture side) - 0.67n
Wood - 0.12N
Cork - 0.3N

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Material:
Neoprene- 2 N
Wood- 1 N
Leather- 1.25 N
Cork- 2.5 N
Silicon- 4 N

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Silicone was the best because it was in the threshold of 0.3 and 0.7.

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In accordance with our data, we have determined that silicon lining would make the best fingertip for a prosthetic hand because it has the most friction out of all other materials.