MEASURING STIFFNESS OF GOLF-CLUB SHAFT

摘要

A device for measuring a stiffness of a golf-club shaft comprises a clamp for holding one end of a golf-club shaft so that the golf-club shaft extends in a substantially horizontal position. A pointer member having a tip end and a root portion is detachably attached at the root portion thereof to the other end of the golf-club shaft held by the clamp so that the pointer member extends in a substantially horizontal position perpendicular to a longitudinal axis of the golf-club shaft. A counterweight is detachably attached to the tip end of the pointer member and applies a predetermined flexure and torsion load to the golf-club shaft through the pointer member. A vertical displacement measuring instrument is provided to measure the amount of vertical displacement of the tip end of the pointer member produced by torsion and flexure of the golf-club shaft when the predetermined load of the counterweight is applied to the golf-club shaft through the pointer member.