Multi-material screw weight

Abstract

Embodiments of golf club heads having weights with two or more parts are described herein. The weight with two or more parts described herein provides a series of interchangeable parts of the overall weight to increase or decrease the weight to specific integers of weight. The two or more parts can comprise a first part with a first specific gravity and a second part with a second specific gravity. The second specific gravity is greater than the first specific gravity.

1 . A weight for a golf club head consisting of:
 a first part comprising a head including a recess and a threaded region, a cavity, and a first material having a first specific gravity; and   a second part comprising a first end, a second end, and a second material having a second specific gravity;
 wherein the second part comprises a second part diameter and a second part length extending between the first end and the second end; and
 wherein the second part diameter is constant along the second part length; 
 
 wherein the threaded region comprises a threaded region length extending only a portion of a length of the head such that the head comprises a region devoid of threads; and 
 the threaded region length ranges from 0.10 inch to 0.25 inch; 
   wherein the threaded region comprises a maximum thread diameter in a range of 0.4 inch to 0.8 inch;   wherein the cavity of the first part comprises a cavity cross-sectional shape; and   wherein the second part comprises a second part cross-sectional shape; and   wherein the cavity cross-sectional shape is complementary to the second part cross-sectional shape;
 wherein the first end of the second part is configured to be removably coupled with the cavity of the first part; 
 wherein the second part is secured within the first part by a press fit, wherein the second part diameter is greater than a diameter of the cavity of the first part; 
 wherein the second part is selected from a plurality of second parts; 
 wherein each second part of the plurality of second parts comprises a different weight; 
 wherein the second part is devoid of a threaded region; 
 wherein the recess of the head is configured to receive a fastener tool; 
 wherein the second specific gravity is greater than the first specific gravity; 
 wherein: 
 the first material comprises:
 a steel material; and 
 a first specific gravity less than or equal to 7.8; 
 
 the second material comprises:
 a tungsten material; and 
 a second specific gravity greater than 7.8. 
 
   
     
     
         2 . The weight of  claim 1 , wherein the first part has a minimum wall thickness of 0.025 inch. 
     
     
         3 . The weight of  claim 1 , wherein the first material of the first part comprises a specific gravity less than or equal to 7.8. 
     
     
         4 . The weight of  claim 1 , wherein the second material of the second part comprises a second specific gravity greater than 7.8. 
     
     
         5 . The weight of  claim 1 , wherein the second part comprises a circular shape, a triangular shape, a square shape, a rectangular shape, a pentagonal shape, a hexagonal shape, or a polygonal shape. 
     
     
         6 . A golf club head comprising:
 a club head body having a striking face, a rear opposite the striking face, a sole, a top opposite the sole, a heel region, a toe region, a hosel, and an aperture;   a weight consisting of:
 a first part comprising a head including a recess and a threaded region, a cavity, and a first material having a first specific gravity; and 
 a second part comprising a first end, a second end, and a second material having a second specific gravity;
 wherein the second part comprises a second part diameter and a length extending between the first end and the second end; and
 wherein the second part diameter is constant along its length; 
 
 wherein the threaded region comprises a threaded region length extending only a portion of a length of the head such that the head comprises a region devoid of threads; and 
 
 the length of the threaded region ranges from 0.10 inch to 0.25 inch; 
 wherein the threaded region comprises a maximum thread diameter in a range of 0.4 inch to 0.8 inch; 
 wherein the cavity of the first part comprises a cavity cross-sectional shape; and 
 wherein the second part comprises a second part cross-sectional shape; and 
 wherein the cavity cross-sectional shape is complementary to the second part cross-sectional shape; 
 wherein the first end of the second part is configured to be removably coupled with the cavity of the first part;
 wherein the second part is secured within the first part by a press fit, wherein a diameter of the first end of the second part is greater than a diameter of the cavity of the first part; 
 
 wherein the second part is selected from a plurality of second parts; 
 wherein each second part of the plurality of second parts comprises a different weight; 
 wherein the second part is devoid of a threaded region; 
 wherein the recess of the head is configured to receive a fastener tool; 
 wherein the second specific gravity is greater than the first specific gravity;
 wherein the weight is removably coupled to the aperture of the club head body; 
 
 wherein: 
 the first material comprises:
 a steel material; and 
 a first specific gravity less than or equal to 7.8; 
 
 the second material comprises:
 a tungsten material; and 
 
   a second specific gravity greater than 7.8.   
     
     
         7 . The golf club head of  claim 6 , wherein the weight is torqued to the aperture to a value no less than 45 in-lbs. 
     
     
         8 . The golf club head of  claim 6 , wherein the first material of the first part comprises a specific gravity less than or equal to 7.8. 
     
     
         9 . The golf club head of  claim 6 , wherein the second material of the second part comprises a second specific gravity greater than 7.8. 
     
     
         10 . A method comprising:
 providing a weight, wherein providing the weight consists of:
 providing a first part; and 
 providing a second part; 
   wherein:
 the weight is configured to be insertable into a golf club head; 
 the golf club head comprises:
 a golf club head body comprising a striking face, a rear opposite the striking face, a top, a sole, a heel region, a toe region, a hosel, and an aperture; 
 
 the first part comprises:
 a steel material; 
 a head; 
 a threaded region; 
 a cavity; 
 a recess; 
 
 the second part comprises:
 a tungsten material; 
 a first end; and 
 a second end; 
 
   a second part diameter;   a length extending between the first end and the second end;   wherein the second part diameter is constant along its length;
 the threaded region comprises a threaded region length extending only a portion of a length of the head such that the head comprises a region devoid of threads; and 
 the length of the threaded region ranges from 0.10 inch to 0.25 inch; 
 wherein the threaded region comprises a maximum thread diameter in a range of 0.4 inch to 0.8 inch; 
   wherein the cavity of the first part comprises a cavity cross-sectional shape; and   wherein the first end of the second part comprises a second part cross-sectional shape; and   wherein the cavity cross-sectional shape is complementary to the second part cross-sectional shape;
 the second part is secured within the first part by a press fit, wherein the second part diameter is greater than a diameter of the cavity; 
   wherein the second part is selected from a plurality of second parts;   wherein each second part of the plurality of second parts comprises a different weight;   wherein the second part is devoid of a threaded region;
 and 
 the weight is removably coupled to the aperture; 
   wherein the recess of the head is configured to receive a fastener tool.   
     
     
         11 . The method of  claim 10  comprising:
 providing the golf club head; 
 providing the weight; 
 inserting the second part into the first part; and 
 coupling the weight to the golf club head with the fastener tool, wherein the weight is pressed or epoxied.