Golf club head
Disclosed herein is a golf club head that comprises a body. The body comprises a sole portion, a crown portion, a skirt portion, and a face portion, positioned at a forward region of the golf club head, opposite a rearward region of the golf club head, and extending from a toe region to a heel region of the golf club head. At least a portion of the body is made of a titanium alloy. The golf club head also comprises a large weight, coupled to the sole portion of the body and made of a steel alloy. A mass of the large weight is at least 40% of a mass of the portion of the body made of the titanium alloy. A total mass of the large weight and the portion of the body made of the titanium alloy is at least 210 grams.
1. A golf club, comprising:
a shaft comprising a butt end and a tip end;
a golf club head comprising a body, defining an interior cavity of the golf club head, and further comprising a sole defining a bottom portion of the golf club head, a crown defining a top portion of the golf club head, a skirt portion defining a periphery of the golf club head between the sole and the crown, a face defining a forward portion of the golf club head, and a hosel defining a hosel bore, wherein the body further comprises a shaft attachment port positioned in the sole and extending into the interior cavity, the shaft attachment port having a port width, the shaft attachment port being located proximate a bottom end of the hosel such that a passage in the bottom end of the hosel provides communication between the hosel bore and the shaft attachment port;
a sleeve mounted on the tip end of the shaft and adapted to be inserted into the hosel bore;
a fastener having a head portion located in the shaft attachment port and a shaft portion extending through the passage, the shaft portion being selectively attachable to the sleeve when the sleeve is inserted into the hosel bore; and
wherein:
the golf club head further comprises a weight attached to a sole portion of the body and defining at least a portion of the sole of the golf club head;
the golf club head further comprises a weight recess formed in the sole portion of the body of the golf club head and extending into the interior cavity of the golf club head;
the weight recess is configured to receive at least a portion of the weight;
the weight has a variable thickness;
at least a portion of the weight is located proximate the shaft attachment port;
a first thickness of the weight proximate the face is greater than a second thickness of the weight distal the face; and
the golf club head has a total volume between about 120 cubic centimeters (cc) and about 240 cc inclusive.
2. The golf club according to claim 1 , wherein at least a portion of the weight is located within a 25 mm radius of the shaft attachment port.
3. The golf club according to claim 1 , wherein:
the weight has a volume of at least 10 cc, inclusive;
the body is made of a titanium alloy;
the weight is made of a steel alloy; and
the crown is made of a fiber-reinforced polymer having a density between 1 gram/cc (g/cc) and 2 g/cc.
4. The golf club according to claim 1 , wherein:
the body is made of a first material having a first material density;
the weight is made of a second material having a second material density;
the first material is one of a titanium alloy or a steel alloy;
the second material is one of a steel alloy or a tungsten alloy; and
the crown is made of a fiber-reinforced polymer having a density between 1 gram/cc (g/cc) and 2 g/cc, inclusive.
5. A golf club head, comprising:
a body, comprising a face portion and defining an interior cavity; and
a large weight, attached to the body, wherein the body is made of at least a first material having a first material density of no more than 8 g/cc, the large weight is made of a second material having a second material density of no less than 7 g/cc, and the first material density is less than the second material density;
wherein:
a ratio of the second material density to the first material density is at least 1.70, inclusive;
at least 60%, inclusive, of a total mass of the large weight is forward of a theoretical forward-rearward midplane of the golf club head that extends parallel to an x-axis of a golf club head origin coordinate system of the golf club head at a midpoint between a forwardmost point of the golf club head and a rearwardmost point of the golf club head;
the body comprises a weight mating recess, configured to receive at least a portion of the large weight;
the large weight has a thickness that varies in a direction away from the face portion of the body;
the thickness of the large weight is greater proximal the face portion than distal the face portion;
at least a portion of the large weight crosses the theoretical forward-rearward midplane of the golf club head;
the large weight has a volume of at least 3 cubic centimeters, inclusive;
the large weight defines a portion of a sole of the golf club head; and
the large weight defines at least 6 square centimeters of a surface area of the sole.
6. The golf club head according to claim 5 , further comprising an adjustable head shaft connection system coupled to the body.
7. The golf club head according to claim 5 , wherein:
the golf club head has a total head length, extending in a forward-to-rearward direction;
the large weight has a total weight length, extending in a forward-to-rearward; and
the total weight length is at least 50%, inclusive, of the total head length.
8. The golf club head according to claim 5 , wherein:
the body comprises a face portion made of a first alloy of the first material having a first ultimate tensile strength and other portions of the body are made of a second alloy of the first material having a second ultimate tensile strength; and
the first alloy is different than the second alloy.
9. The golf club head according to claim 8 , wherein:
the first ultimate tensile strength is at least 10% greater than the second ultimate tensile strength; and
the first ultimate tensile strength exceeds 1,000 MPa.
10. The golf club head according to claim 8 , wherein:
a crown portion of the body is at least partially made of a fiber-reinforced polymer having a density between 1 gram/cc (g/cc) and 2 g/cc, inclusive;
the first ultimate tensile strength is at least 10% greater than the second ultimate tensile strength; and the first ultimate tensile strength exceeds 1,100 MPa; and
wherein the large weight is fixed to the body by at least one of an adhesive and a fastener.
11. The golf club head according to claim 5 , wherein the second material of the large weight has a mass that is at least 45%, inclusive, of a mass of the first material of the body.
12. The golf club head according to claim 5 , wherein a maximum heel-to-toe dimension of the large weight is at least 65%, inclusive, of a maximum front-to-back dimension of the large weight.
13. The golf club head according to claim 5 , wherein:
the large weight comprises a forward portion and a rearward portion;
a theoretical forward-rearward midplane of the large weight, extending parallel to an x-axis of a golf club head origin coordinate system of the golf club head at a midpoint between a forwardmost point of the large weight and a rearward most point of the large weight, separates the forward portion from the rearward portion;
the forward portion extends from a toe region of the golf club head to a heel region of the golf club head;
the rearward portion extends from a forward region of the golf club head to a rearward region of the golf club head;
the forward portion of the large weight is more massive than the rearward portion of the large weight; and
a ratio of a mass of the forward portion of the large weight to a mass of the rearward portion of the large weight is at least 2.5.
14. The golf club head according to claim 13 , wherein a thickness of the forward portion of the large weight steadily increases from the theoretical forward-rearward midplane of the large weight forward toward the face portion of the body.
15. The golf club head according to claim 13 , wherein at least part of the forward portion of the large weight is between 300% and 2000% thicker than at least part of the rearward portion of the large weight.
16. The golf club head according to claim 5 , wherein:
a theoretical forward-rearward midplane of the golf club head, extends parallel to an x-axis of a golf club head origin coordinate system of the golf club head at a midpoint between a forwardmost point of the golf club head and a rearward most point of the golf club head; and
the ratio of the mass of the golf club head forward of the theoretical forward-rearward midplane of the golf club head to the mass of the golf club head rearward of the theoretical forward-rearward midplane of the golf club head is at least 1.1.
17. The golf club head according to claim 5 , wherein the large weight defines no more than 4 square centimeters of the interior cavity.
18. The golf club head according to claim 13 , wherein the large weight is fixed to the body by at least one of an adhesive and a fastener.
19. The golf club head according to claim 18 , wherein a crown portion of the body is at least partially made of a fiber-reinforced polymer having a density between 1 gram/cc (g/cc) and 2 g/cc, inclusive.
20. The golf club head according to claim 5 , wherein the large weight is configured to receive a small weight.
21. A golf club, comprising:
a shaft comprising a butt end and a tip end;
a golf club head comprising a body, defining an interior cavity of the golf club head, and further comprising a sole defining a bottom portion of the golf club head, a crown defining a top portion of the golf club head, a skirt portion defining a periphery of the golf club head between the sole and the crown, a face defining a forward portion of the golf club head, and a hosel defining a hosel bore, wherein the body further comprises a shaft attachment port positioned in the sole and extending into the interior cavity, the shaft attachment port having a port width, the shaft attachment port being located proximate a bottom end of the hosel such that a passage in the bottom end of the hosel provides communication between the hosel bore and the shaft attachment port;
a sleeve mounted on the tip end of the shaft and adapted to be inserted into the hosel bore;
a fastener having a head portion located in the shaft attachment port and a shaft portion extending through the passage, the shaft portion being selectively attachable to the sleeve when the sleeve is inserted into the hosel bore; and
wherein:
the golf club head further comprises a weight attached to the body and defining at least a portion of the sole of the golf club head;
the weight has a variable thickness;
at least a portion of the weight is located proximate the shaft attachment port;
a first thickness of the weight proximate the face is greater than a second thickness of the weight distal the face;
at least a portion of the weight is located within a 15 mm radius of the shaft attachment port;
the weight has a volume of at least 3 cubic centimeters, inclusive;
the weight defines a portion of the sole of the golf club head;
the weight defines at least 6 square centimeters of a surface area of the sole;
the body is made of a first material having a first material density;
the weight is made of a second material having a second material density;
the first material is one of a titanium alloy or a steel alloy;
the second material is one of a steel alloy or a tungsten alloy; and
the crown is made of a fiber-reinforced polymer having a density between 1 gram/cc (g/cc) and 2 g/cc, inclusive.
22. The golf club according to claim 21 , wherein the weight is non-circular.
23. The golf club according to claim 21 , wherein the weight is bonded to the body via an adhesive.
24. The golf club according to claim 21 , wherein at least a portion of the weight extends forward of at least a portion of the shaft attachment port.
25. The golf club according to claim 21 , wherein:
the body further comprises a slot formed in a sole portion of the body;
the slot have a length, defined in a heel-to-toe direction;
the weight has a width, defined in the heel-to-toe direction; and
the width of the weight is greater than the length of the slot.
26. The golf club according to claim 21 , wherein:
at least a portion of the body toeward of the weight is formed of a material that has a density that is lower than the second material density of the weight;
at least a portion of the body heelward of the weight is formed of a material that has a density that is lower than the second material density of the weight; and
at least a portion of the body forward of the weight is formed of a material that has a density that is lower than the second material density of the weight.