Quiz on Spur Gears

It is the circle on gear that corresponds to the contact surface of the friction wheel.

• Pitch circle

• Addendum circle

• Base circle

• Dedendum circle

I is the circle drawn through the top of the gear tooth its center is at the gear center.

• Pitch circle

• Addendum circle

• Base circle

• Dedendum circle

The radial distance from the pitch circle to the addendum circle.

• Addendum

• Dedendum

• Clearance

• Space width

The circle drawn through the bottom of the gear tooth; its center is at the gear center.

• Pitch circle

• Addendum circle

• Base circle

• Dedendum circle

It is the radial distance from the pitch circle to the root circle.

• Addendum

• Dedendum

• Clearance

• Space width

The largest circle centered at the gear center, which is not penetrated by the teeth of the mating gear. It is a circle tangent to the addendum circle of the mating gear.

• Pitch circle

• Addendum circle

• Clearance circle

• Dedendum circle

The radial distance from the clearance circle to the root circle. It is the difference between the dedendum of one gear and addendum of the mating gear.

• Addendum

• Dedendum

• Clearance

• Space width

The radial distance between the addendum and dedendum circle. It is the sum of the addendum and the dedendum.

• Addendum

• Whole depth

• Working depth

• Space width

It is the radial distance between the addendum and the clearance circle.

• Addendum

• Whole depth

• Working depth

• Space width

The minimum distance between the non0dirving side of a tooth and the adjacent side of the mating tooth. It is the amount by which the width of a tooth space exceeds the thickness of the engaging tooth measured on the pitch circle.

• Circular pitch

• Whole depth

• Backlash

• Space width