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Definition Of Golf Terms - Part 2
by Staff 7
LORYTHMIC SCALE - a type of swingweight scale measuring swingweight about a fulcrum point 14? down from the top of the grip. Measurements are in the direct letter/number swingweight designation as D-0, D-1, D-2.
LOW PROFILE - iron heads whose face heights are lower than the average.
MASTER MODEL - the exact replica of a particular wood or iron head from which all the other heads will be copied.
MIRACLE TAPE (Also know as ?2-Way Tape?) - a tape which is coated on both surfaces with adhesive. Used for grip installation.
MODULUS - the amount a material will deform when stressed. High modulus graphite has a higher resistance to deformity (bending) because the carbon atoms lie closer together to form a stronger bond. Used in graphite shaft advertising.
MOLDS - in the investment casting procedure, a 2-part cavity which exactly reproduces the iron head by injecting wax into it.
MOMENT OF INERTIA - measure of an object?s resistance to twisting.
NECK - see Hosel.
OFFICIAL SCALE - a type of swingweight scale that bases its measurements about a fulcrum point 12? down from the grip end. Swingweight measurements are in direct ounce readings such as 20.3, 20.5, etc.
OFFSET (Also called Hosel Offset) - the distance from the farthest front portion of the hosel to the farthest front portion of the leading edge of the clubface.
OVERALL WEIGHT (Also called Static Weight, Total Weight and Dead Weight) - the measurement in grams or ounce of a golf club?s actual weight.
PERIMETER WEIGHTING - process of weighting a club whereby most of the weight is placed in the toe, heel and sole of the head, rather than the center.
PROGRESSIVE OFFSET - usually applies to irons. On each iron club the distance from the farthest front portion of the hosel to the farthest front portion of the iron?s leading edge changes in dimension. In other words, a #2 iron in the set may have a lot of offset and when you get to the #9 iron it may have none. The offset diminishes proportionately from the long irons to the short irons. This feature helps players hit down and through long irons (more offset) and better ?line up? the easier to hit short irons (very little or no offset).
PRORYTHMIC SCALE - a type of swingweight scale basing its measurement on a 14? fulcrum, but also giving total weight readings in ounces and grams.
RADIUSED SOLE - see Camber.
REGISTRATION NUMBER (Also called Recording Number) - a number or series of letters and numbers stamped on the back, sole or neck of woods and irons, indicating either the model style or partial specifications of the club. A decal is also sometimes used on woods.
RIND - used on antique clubs, these were strips of coarse cloth or wood wrapped around the shaft under the leather grip to serve as the underlisting.
ROLL - the vertical curvature or radius built from crown to sole on the face of a wood head.
SCARE - in antique wood clubs, the area of the neck where the shaft and head are spliced together.
SCOOP (Also called Dig) - the sole angle of an iron where the leading edge is lower than the trailing edge when the face is square to the target, and the hosel or bore is perpendicular to the target.
SCORING (Also called Corrugation) - the lines cut, stamped or cast into the face of a wood or iron head.
SCOTCH TOE - a type of iron head design where the toe is somewhat square in its appearance as opposed to being rounded.
SENSICORE? - True Temper? patented technology for an insert placed into each shaft to reduce vibration and improve feel at impact.
SET MAKEUP - the particular complement of golf clubs in any set which by U.S.G.A. rules cannot exceed 14 clubs.
17-4 - a type of stainless steel used in the manufacture of investment cast iron heads, denoting 17% chromium and 4% nickel in the steel composition.
SHAFT CENTERLINE - an imaginary line running down the exact center of the shaft, thru the hosel and touching the ground.
SHAFT CLAMP - a rubber or vinyl jaw designed to hold the shaft firmly in a vise without damaging it.
SHAFT CURVE - the deflected curve of a shaft when its stiffness is being plotted on a deflection board. The curve indicates some of the bending or deflection properties of a shaft. Also known as flex point or bend point or where maximum bending occurs on a given shaft.
SHAFT FLEX - a comparative measurement of a shaft?s resistance to bending or deflection under a given stress and load. Flex can be measured on a shaft deflection board and divided into the five basic flexes: L, A, R, S, and X.
SHAFT FREQUENCY - the measurement of the rate of oscillations of a given flex shaft at a given head weight and club length. The frequency of a shaft or a golf club is used to determine the flex feel of that shaft or golf club using a dynamic method versus a static method.
SHAFT IN HOSEL - type of head to shaft assembly where the shaft fits inside the hosel.
SHAFT OVER HOSEL - type of head to shaft assembly in which the shaft fits over the hosel (irons only).
SHAFT STEP PATTERNS - the length and arrangement of the shaft?s diameter changes (step downs) which indicate the flex characteristics of the shaft.
SHALLOW FACE - wood heads that have a face height of 1-3/8? or less. Any wood head with a face height less than standard.
SLOPE ANGLE - the angle created in the sole of an iron between the sole line (front to back) and the ground. The three sole angles are bounce, square and scoop.
SOLE INVERSION - see Bounce.
SOLE LINE - with the club held in the proper lie and playing position, this is the line of contact of sole to ground running from the leading to trailing edge.
SOLE RADIUS - the amount of curvature of the sole of a wood head, as measured from toe to heel. Usually ranges from four to eight inches of radius.
SOLE WEIGHTING - distributing the weight on a wood or iron head as low in the head as it can be placed. This process is usually associated with low profile clubs and heavy soleplated woods.
STATIC FITTING - method of fitting golf clubs using charts or rules. Seldom do players actually hit shots.
STATIC WEIGHT - See Overall Weight.
STEP PATTERN - the order and length of the individual steps in a golf shaft which are used to indicate shaft model or brand name.
STEP-TAPERING - in the manufacture of steel golf shafts, the procedure of progressively reducing the tube?s diameter from butt to tip by squeezing the shaft down through a series of step dies.
STRONG (LOFT) - less loft than is the standard for any given club.
SWINGWEIGHT - a measurement which indicates the weight distribution of a golf club about a fixed fulcrum point. It is expressed by a letter/number combination (A-1, B-2, C-3, D-1, etc.) or an ounce measurement (20.3, 20.5, etc.).
TARGET LINE - an imaginary line drawn from the ball or clubface directly to the target.
TIP PARALLEL SECTION - the constant diameter of a golf shaft just below the first step down.
TIP SECTION - that part of a shaft from the tip end to the first step.
TIP TAPER SHAFT - a golf shaft with a tapering of its diameter in the tip section. This tapering is at a rate of .0075? per inch.
TOE - the point farthest outward of the clubhead on a wood or iron head.
TOP LINE - the top of an iron head where the face and the back meet. This line can be sharp, blunt or rounded in shape.
TORQUE - the amount of rotational twist that occurs in a golf shaft during the swing.
TRAJECTORY - the pattern or shape of the flight of a golf ball with respect to its height and direction.
TUNGSTEN - a very heavy metal (heavier than lead) used in irons and/or metal woods to place additional weight where the club designer feels it will enhance performance.
UNDERLISTING (Also called a Listing) - the form placed on the grip section of a shaft which serves as the foundation for the shape and size of a leather grip.
UNITIZED SHAFT (Also called a Parallel Tip Shaft) - a type of shaft in which the outside diameter of the shaft from the tip to the first step remains constant or is parallel.
UPRIGHT - when the lie angle is more erect or vertical than the standard.
VENT HOLE - the hole in the cap end of a rubber grip or underlisting designed to release air pressure built up during grip installation.
WEAK - term indicating more loft than is the standard for any given club.
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