A tubular metal blank for the production of golf club shafts for iron clubs, the blank being at least 44" in length, having a cylindrical tip portion, a cylindrical butt portion, and an intermediate, integral, tapering portion, remaining parameters of the blank including the material, the taper angle, the length of the intermediate portion, and the wall thickness being so chosen as to produce a blank of a stiffness characteristic such that by appropriate trimming of the butt and tip portions of ...

In one aspect, a correlated set of individually numbered golf club iron heads progresses from a high numbered head to a low numbered head. Individual heads have a front striking face, a rear face, a sole, a toe, a heel and a hosel. The front striking faces of heads within the set individually have a total planar area defining a progressively decreasing loft angle in going from the high numbered head to the low numbered head. For at least two chosen pairs of heads within the set, the striking fac...

In one aspect, a correlated set of individually numbered golf club iron heads progresses from a high numbered head to a low numbered head. Individual heads have a front striking face, a rear face, a sole, a toe, a heel and a hosel. The front striking faces of heads within the set individually have a total planar area defining a progressively decreasing loft angle in going from the high numbered head to the low numbered head. For at least two chosen pairs of heads within the set, the striking fac...

The golf club shaft comprises a reinforced tip portion from the tip end to the position 300 mm toward the grip end, gripping butt portion from the grip end to the position 100 mm toward the tip end, and an intermediate portion between the reinforced tip portion and the gripping butt portion. The shaft satisfies an equation EI=.alpha..multidot.X at its intermediate portion, where EI (Nm.sup.2) is the flexural rigidity, X (mm) is the distance from the tip end of the shaft, and .alpha. is a given c...

The high spin golf club uses modified grooves for use on all types of known golf clubs, wherein the modified grooves maximizes control of the golf ball through increasing backspin. The high spin golf club's modified grooves can be used alone or in a combination with conventional grooves to tailor the properties of the club face. The modified grooves are of varied configurations and all modified grooves can be used in combination with any other modified or conventional grooves to maximize the bac...

Disclosed is a set of golf clubs. The clubs are divided into at least a first group and at least a second group of golf clubs. The first group desirably comprises a plurality of club heads each having a main body of low density metallic material. The second group of golf clubs desirably comprises a plurality of club heads each having a main body of higher density metallic material than the density of the metallic material of the main body of each of the heads of the first group. The first group ...

In an iron golf club set including at least seven iron golf clubs of the third to ninth club numbers, each moment (Mx(gf.multidot.mm)=W.times.cos .theta..times.L) of each club of the iron golf clubs is set at a range within .+-.3% of the average value Mxm of the moments of the club heads, where W(gf) is a head weight of each of the iron golf clubs, L(mm) is a distance of a center of gravity of a head from the shaft axis line along a line normal to the shaft axis line, and .theta. (.degree.) is a...

A golf club set in which the weight balance of club shafts is optimized for each individual club. The weight balance at the grip-end of the shaft of each of the individual golf clubs increases as the corresponding loft angles of each of the individual golf clubs increase.

A golf club head is provided having a body and a face insert, with a slot in a perimeter region of the body of the club head adjacent the face insert. The slot increases the flex of the hitting surface on impact with a golf ball, thereby increasing the speed with which the ball rebounds off the hitting face and increases the overall distance the ball is hit. The slot preferably moves the sweet spot of the hitting face a distance X from the face center of the hitting face. The slot may be filled ...

This invention provides a golf club head having a first viscoelastic body made of a first viscoelastic material and a second viscoelastic body made of a second viscoelastic material with a loss coefficient the temperature dependence of which is different from that of a loss coefficient of the first viscoelastic material.