Gears and Their Mechanical Characteristics

Toothed, mechanical transmission elements used to transfer motion and power between machine components.

Surface speed of Pinion = Surface speed of Gear or Velocity Pinion = Velocity Gear

Speed Ratio of gear = Teeth ratio of gear, NP/NG = TG/TP = DG/DP

<p>Circular Pitch is the arc length along the pitch circle circumference measured from a point on one tooth to the same point on the next.</p> Signup and view all the answers

<p>Tooth size</p> Signup and view all the answers

<p>Check additional notes for the definition and usage of each type of gears.</p> Signup and view all the answers

<p>Addendum is the height of the tooth above the pitch circle, while dedendum is the depth of the tooth below the pitch circle.</p> Signup and view all the answers

<p>The whole depth is the total length of the tooth space, equal to the sum of the addendum and dedendum.</p> Signup and view all the answers

<p>Backlash is the amount by which the width of a tooth space exceeds the thickness of the engaging gear tooth. Clearance is the distance between the outside diameter of a gear and the root diameter of its mating gear.</p> Signup and view all the answers

<p>Circular tooth thickness is the distance from one side of a gear tooth to the opposite side, while tooth thickness is the thickness of the tooth at a specific point.</p> Signup and view all the answers

<p>A gear train is a mechanical system formed by mounting gears on a frame so their teeth engage.</p> Signup and view all the answers

<p>A simple gear train consists of only one gear on each shaft, while a compound gear train has more than one gear on at least one of the shafts.</p> Signup and view all the answers

<p>Addendum = 1 / Pd</p> Signup and view all the answers

<p>Clearance = 1/8 * Addendum</p> Signup and view all the answers

<p>Pitch Diameter = 24 teeth / 4 = 6 inches</p> Signup and view all the answers

<p>Tooth depth = 2 * Addendum + Clearance</p> Signup and view all the answers

<p>Backlash = 2% of the Circular Pitch</p> Signup and view all the answers

<p>Tooth Thickness = Pitch Diameter / 2</p> Signup and view all the answers