伞齿轮上的齿可以是直链，螺旋形或准双曲面。直齿锥齿轮直齿轮齿实际上有同样的问题 - 每个齿啮合，它会影响相应的牙。当需要改变轴的方向旋转时，螺旋伞齿轮是有用的。它们通常安装在相隔90度的轴，但可以被设计为工作在其他角度。
锥齿轮基本上是圆锥形的，尽管实际的齿轮不一路延伸到顶点（前端部）的锥形限定它。两个锥齿轮啮合，其两个圆锥的顶点位于在单点上，轴也相交于该点。轴之间的角度可以是任何东西，除了0或180度。与在90度的数目相等的齿和轴轴的伞齿轮被称为等比伞形齿轮。锥齿轮的齿可以是直的切割与直齿圆柱齿轮，或者它们可以在各种其他形状切断。 螺旋伞齿轮有齿都沿着它们的（齿的）长度弯曲;及以一定角度设置，类似于的方式相比，正齿轮齿的角度被设置在螺旋齿轮齿。 “零锥齿轮”有齿沿其长度方向是弯曲的，但不倾斜。斜齿圆柱齿轮正齿轮，螺旋锥齿轮具有相同的优点和缺点相对于直切的表兄弟。直齿锥齿轮，一般只是在速度低于5米/秒（1000英尺/分钟），使用的，或为小齿轮，1000rpm的转速。
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原文：
Bevel gears are useful when the direction of a shaft’s rotation needs to be changed. They are usually mounted on shafts that are 90 degrees apart, but can be designed to work at other angles as well.
The teeth on bevel gears can be straight, spiral or hypoid. Straight bevel gear teeth actually have the same problem as straight spur gear teeth -- as each tooth engages, it impacts the corresponding tooth all at once
Bevel gears are essentially conically shaped, although the actual gear does not extend all the way to the vertex (tip) of the cone that bounds it. With two bevel gears in mesh, the vertices of their two cones lie on a single point, and the shaft axes also intersect at that point. The angle between the shafts can be anything except zero or 180 degrees. Bevel gears with equal numbers of teeth and shaft axes at 90 degrees are called miter gears.
The teeth of a bevel gear may be straight-cut as with spur gears, or they may be cut in a variety of other shapes. ’Spiral bevel gears’ have teeth that are both curved along their (the tooth’s) length; and set at an angle, analogously to the way helical gear teeth are set at an angle compared to spur gear teeth. ’Zero bevel gears’ have teeth which are curved along their length, but not angled. Spiral bevel gears have the same advantages and disadvantages relative to their straight-cut cousins as helical gears do to spur gears. Straight bevel gears are generally used only at speeds below 5 m/s (1000 ft/min), or, for small gears, 1000 r.p.m.
