ADDITIONAL SPRING KIT

An expansion kit providing additional helical springs to further extend the parameters of the spring mass vibration apparatus. Each spring has a pair of adjustable spring holders, and the upper holder can be repositioned along the spring length to vary the number of active coils, enabling testing of different effective spring lengths.

• Spring 1: Wire diameter 3.175 mm, pitch 19.05 mm, free length 254 mm, spring rate 0.353 N/mm
• Spring 2: Wire diameter 6.4 mm, pitch 19.05 mm, free length 254 mm, spring rate 7.06 N/mm
• Spring 3: Wire diameter 3.175 mm, pitch 12.7 mm, free length 254 mm, spring rate 0.478 N/mm