Examples of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a body portion of a golf club head may include a cavity having an opening and an interior structure defined by a wall portion and a base portion. A hosel portion may include an insert portion and a neck portion extending therefrom. The hosel portion may be attached to the body portion by an interference fit between the neck portion and the opening of the cavity. The insert portion may be received inside the cavity and may be spaced apart from the interior structure of the cavity. A space between the insert portion and the interior structure of the cavity may be partially or entirely filled with an adhesive to hold the hosel portion in place. Other examples may be described and claimed.

A golf club head comprising a body and a hollow stiffening structure is disclosed herein. The body comprises a face section, a sole section, and a crown section, and defines a hollow interior. The hollow stiffening structure extends within the hollow interior from the crown section to the sole section to reduce stresses placed on the face section during impact with a golf ball. The hollow stiffening structure creates stiffness in a vertical, crown-sole direction of the body, while reducing stiffness in the horizontal, front-rear direction, and is filled with a weighted dampening insert that extends the entirety of the length of the stiffening structure and blocks entry into the stiffening structure.

A golf club head comprising a body and a hollow stiffening structure is disclosed herein. The body comprises a face section, a sole section, and a crown section, and defines a hollow interior. The hollow stiffening structure extends within the hollow interior from the crown section to the sole section to reduce stresses placed on the face section during impact with a golf ball. The hollow stiffening structure creates stiffness in a vertical, crown-sole direction of the body, while reducing stiffness in the horizontal, front-rear direction. These two effects combine to increase ball speed and improve other performance metrics from low center through high center ball impact locations, and simultaneously lower CT of the golf club.

A golf club head includes a head main body, and a toe-side component. The head main body includes a striking face, a hosel portion defining a shaft center line, and a mounting portion for mounting the toe-side component on a toe side with respect to the shaft center line. The toe-side component is fixed to the mounting portion removably. When the toe-side component is removed from the mounting portion of the head main body, a head projected area in a front view of the golf club head becomes smaller.

A training device can easily be affixed or mounted to the hitting face of a golf club. The training device may provide auditory, tactile, and directional feedback for the user during practice so that he/she may learn how to strike the ball consistently on the sweet spot. A training device may include several raised surfaces of varying shapes rising from the base surrounding an aperture centered over the sweet spot of the golf club and larger than the surface area contacted by the ball. Use of the training device may reduce the user's variance from the “sweet spot” due to a strike not only along the longitudinal axis but also along the vertical axis. The user avoids impingement with the raised surfaces of the training device by striking the ball within a pre-set tolerance as well as within the boundaries of the aperture.

Examples of golf clubs and methods to manufacture golf clubs are generally described herein. In one example, a golf club may include a golf club head having a body portion and a center of gravity. A center portion of the body portion may extend from a front portion of the body portion to the rear portion of the body portion. A recess portion may be defined by the center portion. A hosel portion may extend upward from the recess portion. The hosel portion may be positioned at the center of gravity of the body portion. A shaft may be coupled to the hosel portion and extend from the hosel portion. The shaft may have a center axis that passes through the center of gravity of the golf club head. Other examples of golf club heads and methods to manufacture the same may be described and claimed.

A putter-type golf club head includes a main body. The main body includes a forward end, a rearward end opposite the forward end, a bottom portion, a top portion opposite the bottom portion, and a male-type hosel component defining a longitudinal axis that is forwardly canted relative to vertical. A face component is secured to the forward end of the main body. The face component includes a first element formed of a resilient material and a second element formed of a rigid material that is secured to the first element. A striking face generally defines a virtual striking face plane and is at least partially formed by the face component.

A resilient face insert for a golf club head, preferably a putter head, is disclosed herein. In particular, the face insert comprises a plurality of hinge features spaced from a striking surface to ensure consistent ball speed across the striking surface. At least a portion of each hinge feature extends parallel to the striking surface without making contact with the striking surface. In the preferred embodiment, each hinge feature comprises a tab portion that is spaced from the striking surface by a stem portion and that extends parallel to the striking surface. The hinge features may be co-molded with a polymeric backing material in order to further improve performance of the face insert.

A golf putter clubhead is designed with a unique structure using a geometry and a balance technology to provide super symmetry, harmony and balance at motion and at rest. The clubhead includes a body with triangular members, a putting face, and optional holes. The triangular form clubhead does not require compensation during the swing thus allowing for greater repetition and simplicity of movement in turn producing performance benefits via consistency. The geometric triangular shape of the clubhead provides an instantly recognizable assistance in proper alignment at the rest position. The body of the clubhead may be hollow and feature inner symmetrical structures to complement the form of the body and to enhance and provide superior weight distribution and balance, thus, providing a performance edge in swing consistency and performance, and allowing for repeatability of the clubhead.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head may include a body portion with a toe portion, a heel portion, a top portion, a sole portion, a rear portion, and a front portion having a face portion with a face portion thickness extending between a front surface and a back surface. The body portion may be associated with a body portion volume. The golf club head may also include an interior cavity. The interior cavity may include an elastic polymer material including a radiocontrast material. Other examples and embodiments may be described and claimed.