Interference may only be prevented, if the addendum circles of the two mating gears cut the

The two non-intersecting and non-parallel i.e. non-coplanar shaft connected by gears. These gears are called skew bevel gears or spiral gears and the arrangement is known as skew bevel gearing or spiral gearing. This type of gearing also have a line contact, the rotation of which about the axes generates the two pitch surfaces known as hyperboloids.

Pitch circle is an imaginary circle which by pure rolling action, would give the same motion as the actual gear.

None.

In case the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then

Addendum is the radial distance of a tooth from the pitch circle to the top of the tooth.

The fundamental condition of correct gearing is the common normal at the point of contact between a pair of teeth must always pass through the pitch point.

Pitch circle diameter is the diameter of the pitch circle. The size of the gear is usually specified by the pitch circle diameter. It is also known as pitch diameter.

The two parallel and co-planar shafts connected by the gears. These gears are called spur gears and the arrangement is known as spur gearing. These gears have teeth parallel to the axis of the wheel as shown in Fig. 12.1. Another name given to the spur gearing is helical gearing, in which the teeth are inclined to the axis.

None.