(a) A 24-tooth gear has AGMA standard full-depth involute teeth with diametral pitch of 5. Calculate...

   

Transcribed Image Text:

(a) A 24-tooth gear has AGMA standard full-depth involute teeth with diametral pitch of 5. Calculate the pitch diameter, circular pitch, addendum, dedendum, tooth thickness, and clearance. (b) Design a simple, spur gear train for a ratio of -7:1 and diametral pitch of 8. Specify pitch diameters and numbers of teeth. Calculate the contact ratio. (a) A 24-tooth gear has AGMA standard full-depth involute teeth with diametral pitch of 5. Calculate the pitch diameter, circular pitch, addendum, dedendum, tooth thickness, and clearance. (b) Design a simple, spur gear train for a ratio of -7:1 and diametral pitch of 8. Specify pitch diameters and numbers of teeth. Calculate the contact ratio.

Answer rating: 100% (QA)

a Calculation for a 24tooth gear with AGMA standard fulldepth involute teeth and a diametral pitch of 5 1 Pitch Diameter D Pitch diameter is calculated using the formula D Number of Teeth Diametral Pitch D 24 5 48 inches 2 Circular Pitch P Circular pitch is calculated using the formula P Diametral Pitch P 5 06283 inches 3 Addendum A Addendum is calculated using the formula A 1 Diametral Pitch A 1 5 02 inches 4 Dedendum Ded Dedendum is calculated using the formula Ded 125 Diametral Pitch Ded 125 5 025 inches 5 Tooth Thickness T Tooth thickness is calculated using the formula T 2 Diametral Pitch T 2 5 04 inches 6 Clearance C Clearance is calculated as a percentage of tooth thickness Typically it ranges from 0025 to 005 times the diametral pitch Lets assume a clearance of 003 times the diametral pitch Clearance 003 5 015 inches Therefore for a 24tooth gear with AGMA standard fulldepth involute teeth and a diametral pitch of 5 Pitch diameter D 48 inches Circular pitch P 06283 inches Addendum A 02 inches Dedendum Ded 025 inches Tooth thickness T 04 inches Clearance C 015 inches b Designing a simple spur gear train for a ratio of 71 and a diametral pitch of 8 A gear train with a ratio of 71 means that the driven gear will have 7 times the number of teeth compared to the driving gear Lets assume the driving gear has 14 teeth positive ratio and calculate ... View the full answer