端面齿厚[齿厚] Transverse tooth thickness 在圆柱齿轮的端平面上,一个齿的两侧端面齿廓之间的分度圆弧长。对于鼓形齿,在鼓形面的最高处量度。法向齿厚 Normal tooth thickness 在斜齿轮上,其齿线的法向螺旋线介于一个齿的两侧齿面之间的弧长。端面基圆齿厚[基圆齿厚] Transverse base thickness 在渐开线圆柱齿轮的一个端平面上,一个齿的两侧端面齿廓的渐开线起始点之间的基圆 Tooth thickness [Tooth thickness] Transverse tooth thickness In the end face of a spur gear, the length of the indexing arc between the tooth flanks on both sides of a tooth. For drum teeth, measure at the highest point of the drum surface. Normal tooth thickness On helical gears, the normal helix of the tooth line is between the tooth lengths of the flanks of one tooth. Transverse base thickness On one end plane of the involute spur gear, the base circle (circle) between the involute starting point of the flank profile of one tooth