Two involute gears in a mesh have path of approach = 29.83 mm and path of recess = 21.09 mm. The larger gear has 40 teeth and the pinion has 12 teeth. Find the ratio of the sliding to rolling velocity at the:
i) beginning of contact
ii) end of contact
iii) pitch point
r = 72 mm

The distance travelled by a point on either pitch circle of the two wheels during the period of contact of a pair of teeth is called ____________________

The contact ratio is the ratio of arc of contact to the ____________

If the contact ratio is 2.7, two pairs of teeth are always in contact and three pairs of teeth are in contact for _________ % of the time.

For continuous transmission of motion, the contact ratio i.e. n must always be _______

Two involute gears have path of contact 40 mm and the pressure angle is 50°. Find the arc of contact.

Two gears in a mesh have the arc of contact = 27 mm. The pressure angle is 15°. Find the path of contact.

Two involute gears in a mesh have a circular pitch of 25 mm. The arc of contact is 55 mm. Find the number of pairs of teeth in contact.

Two involute gear have a module of 5 mm, the arc of contact is 25 mm. Find the contact ratio of these two gears.

The path of contact of two gears in a mesh is 50 mm and the pressure angle is 45°. The module is 8 mm. Find the contact ratio of these two gears.

The path of approach = 13.92 mm and path of recess = 11.56 mm. The pressure angle is 22.5°. The module is 4 mm. Find the contact ratio of these two gears.