| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a low-cost golf club head which prevents the failure of a shaft by relieving the stress concentration occurring on the periphery of a hosel of the shaft in hitting and is excellent in manufacturing efficiency. SOLUTION: A tapered part formed in an aperture 23 of a shaft insertion hole 21 of the hosel 4 is composed in two steps; the first tapered part 11 and the second tapered part 12 larger in the taper angle than the first tapered part 11 toward a hosel end face 24.</p> |
