Commissioned friction and wear testing can deliver valuable data — but poor preparation leads to wasted time and unreliable results. This article shares 5 practical tips to help you get the most from your commissioned test.
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Tip 1: Define Your Purpose Before Contacting the Lab
The single most important preparation step is to clearly articulate why you need the test. Are you trying to compare two materials? Verify compliance with a standard? Understand a field failure? The purpose determines the test method, the parameters to measure, and what constitutes a meaningful result.
Come prepared to answer: “What decision will this test data support?”
Tip 2: Provide Sufficient and Representative Specimens
Send enough specimens to allow for replicate tests (typically n ≥ 3 per condition) and for any necessary preparation (cutting, cleaning, conditioning). Specimens should be representative of the actual product—if the production surface finish matters, send production parts, not prototype coupons.
Always include the counterpart material as well. Many friction tests are sensitive to the specific material pairing.
Tip 3: Specify Environmental Conditions
Friction and wear are strongly affected by temperature and humidity. If your product operates in specific conditions (humid environment, high temperature, chemical exposure), specify these to the testing lab. Standard lab conditions (23°C/50% RH) may not reflect your application reality.
Tip 4: Agree on Pass/Fail Criteria in Advance
Before the test begins, agree with the testing lab on what the acceptance criteria are. “Low friction” and “good wear resistance” are not measurable. Define specific numerical thresholds (e.g., μk < 0.3, wear volume < 0.5 mm³ after 1000 cycles) that align with your product requirements.
Tip 5: Understand the Limitations of the Test Method
No laboratory friction test perfectly replicates real-world conditions. Understand the accelerated or simplified aspects of the test method you choose. Use the lab data as one input to your engineering judgment — not as a direct prediction of field performance without validation.
HEIDON Commissioned Testing
HEIDON’s commissioned testing service pairs you with specialists who have decades of hands-on experience. We help you define the right test, prepare specimens correctly, and interpret the results in the context of your application.