Friction Measurements

Exponential Business and Technologies Company

Bridging You and Nano

Friction is a key component for real world applications. Any material that makes contact with another surface will have a friction force. Two key components of friction are the static and kinetic friction coefficients. These coefficients can be measured in a single pass over a sample surface with a specified contact part and a known load.

Typical Experimental Results:

Table 1 Friction Coefficient Results for Steel Plate against a Steel Ball

Test	µs	µk	µkmax	µkmin	µkw
1	0.189	0.172	0.183	0.158	0.025
2	0.207	0.183	0.198	0.167	0.031
3	0.236	0.204	0.223	0.184	0.039
4	0.257	0.228	0.252	0.203	0.049
5	0.307	0.251	0.278	0.221	0.057
Average	0.239	0.208	0.227	0.187	0.04
S.D.	0.046	0.032	0.039	0.026	0.013

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Figure 3. Friction coefficient as a function of distance for a steel plate against a steel ball.

Friction Coefficient Results for Acuvue Oasys and Acuve TruEye Contact Lenses against a Glass Slide

Contact Lens	µs	µk	µkmax	µkmin	µkw
Oaysis	0.255	0.197	0.213	0.181	0.032
TruEye	0.123	0.123	0.138	0.104	0.034

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Friction coefficient as a function of sliding distance for Acuvue Oasys with Hydraclear Plus contact lens against glass slide in saline contact lens solution.

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Friction coefficient as a function of sliding distance for the 1 Day Acuvue TruEye contact lens against glass slide in saline contact lens solution.

Applications:

Automated Stage Movement	Ceramics	Coatings and Films
Contact Lenses	Fabrics	Kinetic Friction
Metals	Paper	Peeling
PID Temperature Control	Plastics	Printed Surfaces
Printer Rollers	Reciprocating Motion	Repeat Measurements
Rubbing and Wear Testing	Static Friction	Surface Condition
Variable Cycles	Variable Load	Variable Speed
Various Contact Types	Wear Resistance	Wet and Dry Friction

For more information please read our application notes.

Instruments: Kyowa TS-501 Triboster

triboster

Key Specifications:

Detecting Range	0-500gf (4.9N) Friction Force
Friction Coefficient Resolution	0.001
Maximum Sample Size	178x60x50mm
Measurement Speed	0.2-100mm/s
Maximum Repetitions	1000
Measurement Stroke	1-80mm
Maximum Temperature	200°C