The golf rules stipulate that the ball has a weight of 45.93 grams and a diameter of 42.67 mm or more and a circular shape. Players choose different hard and soft balls according to their swing strength. The hardness of the ball is called Compression, the general ball is Compression70, 80, 90, 100, etc. The larger the number, the harder the ball is.
Older players or small-powered ladies, if you use the Compression100 ball, the shape of the ball will not be affected when the ball hits the ball, and the ball's elasticity will not be exerted. On the contrary, if the youth with great strength hit the Compression70 hard, the ball will be flattened. For the average player, it is more appropriate to use the Compression 80 and 90 balls. The hardness of the ball is proportional to the distance. The hard ball is used for a long distance. The soft ball is used for good directionality. The golf ball is described in detail below.
1 type: three kinds, single layer ball, double layer ball, three layer ball (TITLUIST)
Material: A, synthetic resin;
B, rubber band winding, about 200 yards long. The inner layer is a compressed liquid with 440 pits on the outer surface, which can rub with steel to produce a swirl, which will generate buoyancy in the air, allowing the ball to fly farther;
C, middle layer: mixed with tungsten metal powder and synthetic resin, can enhance the flying speed of the ball and keep the ball rotating. (refers to titanium balls)
2 Weight: The weight of the ball should not exceed 1.620 ounces (45.93 grams).
3 Size: The diameter of the ball shall not be less than 1.680 inches (42.67 mm).
4 Sphere symmetry: The ball must not be designed, manufactured, or intentionally altered to have characteristics that are different from the sphere's symmetry.
5 initial speed: the initial speed of the ball should not be greater than 250 feet / sec.