Mathematics For Machine Technology
Mathematics For Machine Technology
8th Edition
ISBN: 9781337798310
Author: Peterson, John.
Publisher: Cengage Learning,
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Chapter 48, Problem 65A
To determine

(a)

The pitch diameter of the spur gear.

Expert Solution
Check Mark

Answer to Problem 65A

The pitch diameter is 260 mm.

Explanation of Solution

Given:

Module (m) = 10mm

Number of teeth = 26

Concept Used:

  module=pitchdiameternumberofteeth

Calculation:

  module(m)=pitchdiameter(D)numberofteeth(N)pitchdiameter=mNpitchdiameter=10×26mmpitchdiameter=260mm

Conclusion:

The pitch diameter is 260 mm.

To determine

(b)

The circular pitch of the spur gear.

Expert Solution
Check Mark

Answer to Problem 65A

The circular pitch is 31.416 mm.

Explanation of Solution

Given:

Module (m) = 10 mm

Number of teeth = 26

Concept Used:

  Forspurgear,Circularpitch(PC)=3.1416×Pitchdiameter(D)Numberofteeth(N)

Calculation:

  Forspurgear,Circularpitch(PC)=3.1416DNPC=3.1416×26026PC=31.416mm

Conclusion:

The circular pitch is 31.416 mm.

To determine

(c)

The outside diameter of the spur gear.

Expert Solution
Check Mark

Answer to Problem 65A

The outside diameter is 280 mm.

Explanation of Solution

Given:

Module (m) = 10 mm

Number of teeth = 26

Concept Used:

  Pitch(P)=Numberofteeth(N)Pitchdiameter(D)Outsidediameter(Do)=N+2P

Calculation:

  Pitch(P)=Numberofteeth(N)Pitchdiameter(D)P=26260P=0.1Outsidediameter(Do)=N+2PDo=26+20.1Do=280mm

Conclusion:

The outside diameter is 280 mm.

To determine

(d)

The addendum of the spur gear.

Expert Solution
Check Mark

Answer to Problem 65A

The addendum is 10 mm.

Explanation of Solution

Given:

Module (m) = 10 mm

Number of teeth = 26

Concept Used:

  addendum=0.3183×Circularpitch(PC)

Calculation:

  addendum(a)=0.3183PCa=0.3183×31.416mma=10mm

Conclusion:

The addendum is 10 mm.

To determine

(e)

The working depth of the spur gear.

Expert Solution
Check Mark

Answer to Problem 65A

The working depth is 20 mm.

Explanation of Solution

Given:

Module (m) = 10 mm

Number of teeth = 26

Concept Used:

  Foraspurgear,Workingdepth(WD)=2.000Pitchofthegear(P)

Calculation:

  Foraspurgear,Workingdepth(WD)=2.000Pitchofthegear(P)WD=20.1WD=20mm

Conclusion:

The working depth is 20 mm.

To determine

(f)

The tooth thickness of the spur gear.

Expert Solution
Check Mark

Answer to Problem 65A

The thickness of the tooth is 15.708 mm.

Explanation of Solution

Given:

Module (m) = 10 mm

Number of teeth = 26

Concept Used:

  Foraspurgear,Thicknessofatooth(T)=1.5708Pitchofthegear(P)

Calculation:

  Foraspurgear,Thicknessofatooth(T)=1.5708Pitchofthegear(P)T=1.57080.1T=15.708mm

Conclusion:

The thickness of the tooth is 15.708 mm.

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