A heel is subject to blows of specified energy, delivered by a pendulum under a specified frequency, testing continues until failure of the heel takes place or satisfactory fatigue resistance is achieved.

The heel fatigue tester is used to determine the resistance of medium and high heels of ladies’ shoes under repeated small impacts to the heel tip.

Impact energy: 0.68J ± 0.02J

Impact frequency: 60 blows/min

Impact angle: 90 degrees

Pendulum: φ 57 ± 1 mm, Thickness 20 ± 1 mm

Pendulum shaft: φ 12.5 ± 1 mm

Striker head (L × W × T): 35 × 20 × 6 mm

Striker head corner radius: R3 mm

Pendulum moment at horizontally: 0.68 N.m

Counter: LCD digital display 0 – 999999 (adjustable)

Power supply: 1φ AC 220V 50/60Hz 3A

BS-5131 4.9, ISO 19956