| 摘要 |
<p>PURPOSE: To balance an oscillation frequency by composing of that by using the consistency of measuring value of the oscillation frequency collected from a chord-directed surface having an oscillation, a club head is fixed to a shaft so as to be at a right angle against the chord-directed surface used for measuring the oscillation frequency between the club head and a ball-hitting surface. CONSTITUTION: When a shaft, is vibrated in various plane, the shaft is loosened and rotated, and again the shaft is fastened and vibrated. This trying cycle is continued until a setting position of causing a plane vibration is found. Using this setting position, the oscillation frequency in the shaft 1 is measured, a mark of determining a point 4 in a chord-directed diameter 5 is marked. Particularly, this oscillation frequency corresponds to the chord-directed diameter 5. After that, during the installation of a balancing set, a desired accuracy is achieved in a club set completed by setting the chord-directed diameter 5 so as to become a right angle against a plane 6 including the ball hitting surface of the club head.</p> |
