Gear drives Millwright Mechanics lvl 2 Exams Prep

Gear drives Millwright Mechanics lvl 2 Exams Prep

1. Gears increase speed using an Overdrive unit

2. Gears reduce speed and increase torque using a Reduction unit


3. connect shafts by using a gear train Gears

4. What is the pitch circle of a gear? Circumference of the
cylinder

5. What is the pitch line? Line of contact between 2
cylinders

6. What is the addendum? 1) amount of gear tooth
1) the amount of the gear tooth above the pitch circle above pitch circle
2) the amount of the gear tooth below the pitch circle

7. On a gear chart, where is the addendum located? Between pitch circle and
outside diameter




8. On a gear chart, where is the circular pitch (CP) locat- The distance between two
ed? corresponding points on
adjacent teeth, measured
on the pitch circle






, Gear drives Millwright Mechanics lvl 2 Exams Prep

9. On a gear chart, where is the Dedendum located? Between pitch circle and
root diameter




10. On a gear chart, where is the clearance (CL) located? It's the gap between
working depth and the
whole depth




11. What is the diametral pitch and what is the formula? Total number of teeth on
the gear divided by pitch
diameter in inches
DP = N / PD

12. What is the pitch diameter? Diameter of pitch circle




13. Diametral pitch, pressure angle, and tooth profile are Meshing
integral to proper of gears

14. What is the whole depth? Total height of a tooth OR
the total depth of a tooth
space