Rule

Formula

Having

To Get

Multiply the circular pitch

Addendum

Circular pitch

by 0.3183.

Multiply the circular pitch

Working depth

Circular pitch

by 0.6366.

Multiply the circular pitch

Whole depth

Circular pitch

by 0.6866.

Clearance

Multiply the circular pitch

Circular pitch

by 0.05.

Divide 3.1416 by the

Diametral pitch

Circular pitch

circular pitch.

Divide the number of teeth

Diametral pitch

Pitch diameter and

by the pitch diameter.

number of teeth

Add pitch diameter of gear

Center distance

Pitch diameter of

(PDg) to pitch diameter of

gear pinion

pinion (PDp) and divide by 2.

Diametral pitch

Divide the number of teeth

Outside diameter and

plus 2 by the outside

number of teeth

diameter.

Divide the number of teeth

Pitch diameter

Number of teeth and

by the diametral pitch.

diametral pitch

Subtract from the outside

Pitch diameter

Outside diameter and

diameter the quotient of 2

diametral pitch

divided by the diametral

pitch.

Divide the number of teeth

Outside diameter

Number of teeth and

plus 2 by the diametral pitch.

diametral pitch

Outside diameter

Add to the pitch diameter

Pitch diameter and

diametral pitch

the quotient of 2 divided by

the diametral pitch.

Pitch diameter and

Divide the number of teeth

Outside diameter

number of teeth

plus 2 by the quotient of the

number of teeth divided by

pitch diameter.

Number of teeth

Multiply the pitch diameter

Pitch diameter and

by the diametral pitch.

diametral pitch

AIII-2

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