The normal circular pitch of two helical gears in a mesh is 7 mm. If the number of teeth on the smaller gear is 22 and the gear ratio is 2, find the pitch diameters of the gears. Ψ₁ = 40° and Ψ₂ = 25°.

For two gears having shaft angle 90° and friction angle 6°, find the maximum efficiency of the helical gears.

When large gear reductions are needed _________ gears are used.

The driven gear in the worm gear is a helical gear. True or false?

Which is of these is an advantage of worm gear?

The distance between corresponding points on adjacent teeth measured along the direction of the axis is called ____________

The distance by which a helix advances along the axis of the gear for one turn around is called _____________

The angle at which the teeth are inclined to the normal of the axis of rotation is called _______________

What is the velocity ratio of worm gears?

Find the helix angle of the worm if the pitch of the worm gear is 12 mm and the pitch diameter is 50 mm.

Find the speed of the gear if the worm is a three start worm rotating at 500 rpm. The gear has 20 teeth.