Refresher 03

The angle between the tooth profile and a radical line at its pitch point

Pressure angle

The radial distance from the addendum circle to the working depth circle

Working depth

The total depth of a tooth space equal to addendum plus dedendum also equal to working depth plus clearance

Whole depth

It is a condition in generated gear teeth when any part of the fillet curve lies inside of a line drawn tangent to the working profile as its lowest point

Under cut

The curve formed by the path of a point on the extension of the radius of the circle as it rolls along the curve or line

Trochoid

A plane perpendicular to the axis plane and to the pitch plane

Transverse plane

The octal width dimensions of a gear blank to the pitch plane

Total face width

The space between the teeth measured along the pitch circle

Tooth face

Arc of the pitch circle through which a tooth travels from its contact with the mating tooth at the pitch point where the contact ceases

Arc of recess

The amount by which the width of the tooth space exceeds the thickness of the engaging tooth on the pitch circles.

Backlash

Helical gears mounted on non-parallel shafts are called

crossed helical gear

Which of the following type of ropes that the wires in the two adjacent strands are twisted in the opposite direction?

Composite or reverse laid ropes

It is an extra flexible hoisting rope used in steel mill ladles, cranes, high speed elevators

6 x 37

Which of the following type of gears is used to connect intersecting shafts usually but not necessarily at 90°?

Bevel gear

Which of the following type of gears that has teeth cut on the inside of the rim instead of on the outside?

annular gear