Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head may have a body portion having a toe portion, a heel portion, a top portion, a sole portion, a front portion, a lead edge portion, a back portion, and an interior cavity. The golf club head may also have a polymer material partially or entirely filling the interior cavity. Other examples and embodiments may be described and claimed.

A ball striking device, such as a golf club, includes a head that includes a face having a ball striking surface configured for striking a ball and a body connected to the face and extending rearward from the face. A face member formed primarily of a metallic material forms the face, and a body member is connected to the face member and extends rearward from the face member to form at least a portion of the body. The body member is formed at least partially of a polymer material, and has a doped portion containing a doping material dispersed within the polymer material. The doping material may have a different density than the polymer material, such that the doped portion has a different density than the portions of the body member not containing the doping material. A co-molding method may be used to form the ball striking device.

An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.

An iron-type golf club head includes a club body including a heel portion, a sole portion, a toe portion, a top-line portion, and a face portion having an ideal striking location. In some embodiments, the sole portion extends rearwardly from a lower end of said face portion and includes two or more slots extending upwardly in the z-axis direction into the body. In some embodiments, the toe portion includes one or more slots extending heelwardly in the x-axis direction into the body. In some embodiments, the top-line portion includes one or more slots.

A shaft set 2S includes a first shaft SF1, a second shaft SF2 shorter than the first shaft SF1, and a third shaft SF3 shorter than the second shaft SF2. At least the second shaft SF2 and the third shaft SF3 each include butt partial bias layers s3 and s4. Weights of the butt partial bias layers s3 and s4 are increased as the shaft is shortened. At least the first shaft SF1 and the second shaft SF2 each include tip partial bias layers s10 and s11. Weights of the tip partial bias layers s10 and s11 are decreased as the shaft is shortened.

An improved golf club putter having a selectable hosel, each hosel having a characteristic lie angle and loft angle, wherein the hosel is mounted to the head of the golf club, and wherein the hosel has a position orientation feature which aligns the shaft and hand grip with respect to the putter head for accurate operation of the golf club putter.

A golf club head includes a body having a heel portion, a toe portion, a sole portion, and an outer surface, a strikeface having a geometric center, a head center of gravity, and a weight member including a weight pad. The weight member is configured to be repositionable by the user to a first position or a second position. The club head having the weight member in the first position shifts the head center of gravity toward the strikeface, and the club head having the weight member in the second position shifts the head center of gravity away from the strikeface.

A head includes a face surface, a back surface, and a top blade. The back surface includes a top-side region and a sole-side region. The top-side region includes a toe recess part located on a toe side relative to a face center, a heel recess part located on a heel side relative to the face center, and a first thick portion extending along the top blade and located on an upper side relative to the toe recess part and the heel recess part. In a reference state in which the head is placed on a horizontal plane, an angle between a lower edge of the first thick portion and the horizontal plane is denoted by 1, and an angle between the top blade and the horizontal plane is denoted by 2. The angle 1 is smaller than the angle 2.

A golf club set according to the present invention is constituted by a plurality of golf clubs having different loft angles, each of the golf clubs has a shaft and a golf club head, and each of the golf club heads have a crown part, a face part, a sole part, and a hosel part to which the shaft is attached. In the face part, an upper edge line that is a boundary with the crown part curves so as to protrude upward, and, out of the plurality of golf clubs, at least a pair of a first golf club having a lower loft angle and a second golf club having a higher loft angle are configured such that, in a reference state, an uppermost point of the upper edge line of the second golf club is located further on a toe side than in the first golf club.

An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.