I agree with t_niehoff
There are mulitple types of Wing Chun punches.
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- chair kuen = pulling vertical punch
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- chaap kuen = low punch
Faan kuen = circling punch either inside or outside
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- ngoi faan kuen = inside whip punch
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- hoi faan kuen = outside whip punch
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- doi gok kuen = diagonal punch
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- chour kuen = hammerfist
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- joong-lo kuen = drilling punch
Chun geng kuen= one inch punch
Fung ngan kuen or fung an kuen = phoenix eye punch with the index knuckle forward
Lin wan kuen = continuous chain punching
Here is a section on punching from the Wing Chun Archives web site.
http://www.wingchunkuen.com/why/articles/contemporary/gordon_punching.html
Eight Fists
The most used and recognized Wing Chun punch is the pulling vertical punch “chair kuen”. It is said that all other punches are a variation based on this simple yet very important punch. The proper structure is by holding the fist vertical, the whole fist should make contact with the intended target, with the bottom three knuckles emphasized. By holding the fist in a vertical position, the muscles in the arm are kept in their most relaxed and natural position. This position also considers the skeletal structure of the arm. Basically, the skeletal alignment is very strong structurally while the muscles are being kept relaxed, allowing for fast punches with the explosive release of energy into the opponent. The punch explodes forward like a bullet. The elbow is forced inward and down by keeping the fist vertical, this position promotes trapping, a method used in conjunction with the attacking hand. The elbow should work like a piston pushing and pulling the fist to its proper placement, along the elbow line. The rear elbow’s position also helps to defend against mid level body attacks. Even though this punch travels in a straight line, it contains drilling movement, without this the punch is dead, not to mention there a greater possibility of damaging the elbow. This punch is considered an uprooting technique because of the rising path it travels. It starts at the height of the sternum and drills upward until the motion completes at shoulder height, thus, uprooting the opponent if properly placed. When the fist is in the rear position, do not bend the wrist, keep it in the same position as it would be when extended.
Drilling punch “joung-lo kuen” is a mid level punch that travels down the centerline and stops with the elbow about a fist away from the practitioners own body with palm facing upward. This punch drills forward and makes contact with the entire fist, while focusing on the front two knuckles because of the angle of the fist. This punch has forward energy with a slight upward drill; it may also be used similar to a boxer’s uppercut. Don’t extend this punch; keep it close to the body and bring your body to the target.
Low punch “chaap kuen” is a straight punch focused at a low-level area. The entire fist makes contact while the focus is on the first two knuckles. The angle of the fist is almost horizontal. A low vertical punch would make contact with the index finger first, putting the wrist in a vulnerable position. While practicing this punch, it should be aimed forward, not to the floor. Again, like all the punches, there must be drilling motion within this punch.
Inside whipping punch “ngoi faan kuen” is a straight punch that starts with a small circle which travels to a straight line. This punch travels on the centerline and is used to move around something in its path with a circular movement. The elbow must not float outward from the side of the body otherwise this punch would become a back-fist, which is not a Wing Chun punch. The elbow must be behind the fist to power it forward. The entire fist will make contact with the lower three knuckles emphasized. A whipping type of energy should be used with is punch.
Outside whipping punch " hoi faan kuen" is very similar to the inside whipping punch except that it circles to the outside of the centerline and proceeds back to the centerline. This punch also uses a whipping motion and is used to move around something that is blocking its intended target. Keep the circles very small for both the inside and outside whipping punches otherwise you will open yourself up for an attack. Again, the entire fist makes contact with the lower three knuckles emphasized.
Inside diagonal punch “ngoi doi gok kuen” appears similar to a boxers hook except that the whole body turns, drilling the punch into the center, ending with the fist on the centerline. This fist can be used when a straight line cannot. The fist is at the height of the sternum when practicing in the air, while the angle of the fist is in between being horizontal and vertical (palm facing yourself). The elbow is out slightly, while sunk. The entire fist makes contact with this punch.
Outside diagonal punch “hoi doi gok kuen” travels from the opposite shoulder and heads in a straight line to the centerline. This punch cuts inward to find or create an opening in an opponent’s structure. This fist can be used when you do not have the centerline. Quite often, outside facing footwork is used with this punch. The entire fist makes contact with the lower three knuckles emphasized.
Hammer fist “chour kuen” makes contact with the bottom side of the fist. In order to structurally support the fist, the thumb must be placed on top of the index finger rather than on the side. This fist may be applied in any angle needed, high or low. Any type of chopping motion may be replaced with the hammer fist.