Lesson on Golf Club Terminology & Definitions(part two)

High-Modulus Graphite A shaft material stiffer than standard graphite. The higher the modulus of graphite, the lower its compression strength. High Polish Finish Shiny (mirror) finish applied to stainless steel iron heads through a series of polishing operations. Hook Face A wood with a closed face angle. (Mizuno MP-57 Irons)Hook face woods may help players who slice to hit the ball straight. Horizontal Flow Weighting Distributing weight from club to club in a set of irons, with the highest concentration of weight moving from the toe of the longer irons to the heel of the shorter irons. Hosel The entry point of the shaft into the head on any golf club. Inset Hosel A club design with the hosel toward the center of the club face in an attempt to reduce head twisting. Leading Edge The front edge of the clubface. Lie The angle from the shaft to the ground line when the club is measured in normal playing position. Lift Upward force on a golf ball as it flies. Lightweight Shaft A shaft that falls within 3.80-4.24 ounces in steel or alloy shafts and within 3.20-3.60 ounces in composite shafts. Loft The angle of the clubface that controls trajectory and affects distance. Low Balance Point (LBP) A shaft with a high percentage of its weight toward the tip. Low Profile Head An iron or wood head that is shorter from topline to soleline than typical. Mallet A type of putter head identified by its broad appearance from front to back when positioned at address. Maraging Steel A steel alloy harder than are non-maraging steels such as 17-4 and 15-5. Maraging steel is commonly used in club face applications, rather than in entire club heads. Melonite A black corrosion-resistant plating applied to some club heads. Milled Face A club face milled to .001″ for flatness to promote smoother roll. Midsize Wood Any wood with a clubhead around 185cc in size. Modulus The measure of a fiber’s stiffness or resistance to bending. The higher the modulus, the stiffer the material. Muscleback Iron See Blade Style Iron. Non-Conforming Club A club whose construction does not allow it to be played in any event (either professional, amateur or club-level) as sanctioned by USGA Rules. Non-Conforming Club (Driver) List A list of clubs (particularly drivers) that do not conform to USGA equipment requirements.


The distance from the forward most point of the hosel to the leading edge of the blade.(Mizuno Mx-200 Irons) Offset will help a player to align the club face with the target, reducing a slice, and may produce higher ball flight. Oversize Iron Head Any iron head larger 43 millimeters and a blade length of 75 mm. Oversize Wood Head A wood head with volume greater than 200 cc’s. Perimeter Weighting Redistributing weight on a club head to the heel and toe in an attempt to stabilize the club on all types of impacts. Progressive Offset Iron sets with longer irons having more offset and shorter irons having less. Progressive Weighting Head design where weight positioning shifts from one club to the next. For example, a #1 iron may have more weight concentrated on its toe, a #2 iron slightly less, and so on. Also called Flow Weighting. Rails Raised areas on the soles of metal woods, lowering the center of gravity of the club and providing less resistance as the club travels through the turf. Rescue A name given to any number of clubs that combine features of a wood and an iron. “Rescue” is also the trademarked name of this type of club from TaylorMade that began the trend. See also “Hybrid.” Roll The measure of face curvature from crown to sole on woods. Sandblast Light gray finish applied to the some iron and wood heads. Applied using an air compressor and sandblasted with aluminum oxide sand. Satin Finish “Brushed” finish applied to some stainless steel iron heads and metal wood soles by finishing belts. Scoring Lines Lines or grooves on the face of an iron or wood club. 17-4 Stainless Steel Stainless steel alloy used in Iron and metal wood head construction. 17-4 is no more than 0.07% Carbon, between 15 and 17% Chromium, 4% Nickel, 2.75% Copper, and 75% Iron and trace elements. Harder than 431 stainless steel. Shallow Face Any wood or iron having a face height shorter than normal. 6-4 Titanium Titanium is used in wood heads manufactured with the formula 6Al-4V: these are 90% Titanium, 6% Aluminum and 4% Vanadium. Titanium is often used in oversize and larger heads. Sole The bottom or underside of any type of golf club. It is where the club rests on the ground in playing position.   Sole Weighted Iron An iron head with the majority of its weight concentrated near the sole of the club, producing a lower center of gravity. Sole Width The measure of a sole from the leading edge to the trailing edge. A narrow sole is better from firmer ground; wide soles are helpful in getting the ball airborne from softer ground. Sole Camber The curvature from the leading edge to the trailing edge. Spring-Like Effect A golf club face designed to “flex” upon ball impact, potentially propelling the ball a longer distance than if the face did not flex. See also “Flexible Face” and

“Trampoline Effect”.

Square (Box, “U”) Grooves Face lines or grooves pressed, cut, or cast into a rectangular shape. Standard Size Wood Any wood head with volume of around 150cc. Standard Weight Shaft A steel shaft within the range of 4.25-4.62 ounces. Step Where the diameter of a steel shaft “steps up” noticeably to a larger diameter.   Stepless Steel shafts without”steps up” in diameter. FMC Rifle and Apollo Balistik are stepless shafts. Step Pattern The pattern made by the sequence of steps of a steel shaft which vary by manufacturer and shaft model. Strong Loft A club, usually an iron, with loft that is less than the standard specification for that club. Stronger lofted clubs tend to hit the ball lower and longer than standard lofts, but may sacrifice some control. Super-Steel Alloys of steel that are stronger and lighter than 17-4 stainless. Swingweight A club’s weight distribution around a fixed fulcrum point. The fulcrum point is typically 14″ from the butt of the club. It is measured in alpha-numeric units such as D-1, D-2, and so on with higher letter-number units indicating more weight in the head relative to the grip. Ti-Alloy Alloy used for wood heads that contains some Titanium, but a much larger amount of less expensive (generally Aluminum) alloys. Tip Stiff A shaft with a tip stiffer than the rest of the shaft. Tip stiff shafts are generally designed with harder swinging players in mind. Titanium Club head metal primarily for woods with a higher strength-to-weight ratio than most steel alloys. (Mizuno MX-300 Irons)See also Forged Titanium and 6-4 Titanium. Topline The top part of an iron blade, running from heel to toe visible to the golfer at address. Torque Measure of a shaft’s resistance to twisting. Low torque shafts twist less and are recommended for stronger players. Total Weight Weight of the entire assembled club as expressed in ounces or grams. Trajectory The shape and height of a golf ball’s flight in relation to its direction. Trampoline Effect A golf club face designed to “flex” upon ball impact, potentially propelling the ball a longer distance than if the face did not flex. See also “Flexible Face” and “Spring-Like Effect”. Trailing Edge The back edge of the sole. Tri-Metal A club head comprised of three separate metals. Trouble Club Clubs used to play the ball from a difficult lie. Trouble clubs often have unusual sole construction – perhaps rails – that lower the center of gravity. Trouble clubs may be irons, woods or hybrids. Tungsten A heavy steel/tungsten compound is used to add weight to a club head, either as a swingweighting material in the shaft or as a defined weight attached somewhere in/on the head. U-Groove Used in iron face structure, more pronounced than “V” grooves. See “Square Groove.” Ultralight Shaft Composite shafts weighing less than 2.00 ounces or 65 grams. Upright Lie A club’s lie that is more upright than the standard specification for that particular head. V Grooves Face grooves pressed, cut, or cast into a “V” shape during club manufacture. Velocity

The speed of a golf ball.

Vertical Flow Weighting Club set weighting with weight shifting vertically from a concentration of weight toward the sole of long irons to more traditional weighting on short irons. Volume The measurement of the size of a wood head as measured by liquid displacement. BOLA TANGKAS