Golf club shafts
作者： Joseph M. Braly , Warren K. Braly
DOI:
关键词:
摘要: A tubular blank (10) for producing golf club shafts comprises a butt section (12) having uniform cross-sectional configuration along its length, tip (14) also and tapered (16) interconnecting the sections. Metallurgically formed rifling (18) on interior surface of extends throughout entirety butt, The produced from these blanks have increased strength stiffness which is direct result rifling. set group with each same length natural frequency. Predetermined portions are then selectively removed
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