Sample Prepare

Laboratory Sample - As a laboratory sample, randomly select a quantity of buttons, approximately 100 to 200, from a carton and from contained boxes, that adequately represents the material, from which test specimens may be selected.

Test Specimens - Randomly select 15 buttons from the laboratory sample for testing. If test specimens are submitted for preproduction approval, testing 1 dozen buttons is acceptable.

Procedure

Determine Button Ligne Size - Using a set of calipers or a micrometer slowly bring the instrument faces or anvils into contact with the button to obtain the button diameter. Divide the measured diameter in mm (in) by the constant 0.635 mm (0.025 in.) and record to the nearest whole number as the ligne Size.

Determine Impact Resistance - Place specimen in centering device for ligne size of button so it lies at the center of the vertical tube. Allow the mass to fall from a predetermined and reproducible height onto the button. Lift the mass and remove the specimen from the metal base.

Evaluation

Visually examine the tested specimens with a 5X magnifying glass for cracking, chipping, and breakage, any of which constitutes damage. Test the remaining specimens.

Report

State that the specimens were tested as directed in Test Method D 5171. Describe the material or product sampled.

• Total number of specimens.
• Button ligne size.
• Height of fall and mass of plunger, if the standard conditions are not used.
• Number of specimens damaged due to (1) cracking, (2) chipping (3) breakage.

AVENO  Machine  Recommend:

AG12B Button Impact Resistance Tester

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