1.5M20x20x960 right oblique

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A rack is a bar-shaped part matched with a gear. It is equal to a segment of the circumference of a gear with an infinite diameter. There are many teeth evenly distributed on one side, which mesh with gears and turn rotation into movement, or movement into rotation. The rack is a long bar with teeth on one side, which can be considered as a segment on a gear with an infinite diameter.

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rack

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1.5M20x20x960 right oblique

main feature
(1) Since the tooth profile of the rack is a straight line, each point on the tooth profile has the same pressure angle, which is equal to the inclination angle of the tooth profile. This angle is called the tooth profile angle, and the standard value is 20°.
(2) Any straight line parallel to the addendum line has the same pitch and module.
(3) The straight line parallel to the tooth top line and the tooth thickness equal to the tooth slot width is called the index line (center line), which is the reference line for calculating the rack size.