demerits of sliding mesh gearbox
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1. Since gears are in constant mesh in cmg ,helical or herringbone gears can be used and in sliding mesh only straight spur gears can be used.
2. More effort is required in sliding mesh compared to cmg where only dog clutch has to slide so need for extra mechanism to reduce efforts required.
3.More chances of failure since gear tooth while sliding has to bear more impact loading and for frequent changing of gears more chances of gear failure but in cmg only chance of failure is of dog clutch.
4.Less lifespan compared to cmg due more wearing of gears in sliding mesh.
5.Increased cost since tooth designed must be of high stability under fluctuating laods.
6. CMG contains easy replacibility of dog clutch but in case of SMG, failure is of gears, so if it fails than it requires time and money to manufacture new gear to perform the same task.
Last and most important it is preferable due to its more efficiency.
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2. More effort is required in sliding mesh compared to cmg where only dog clutch has to slide so need for extra mechanism to reduce efforts required.
3.More chances of failure since gear tooth while sliding has to bear more impact loading and for frequent changing of gears more chances of gear failure but in cmg only chance of failure is of dog clutch.
4.Less lifespan compared to cmg due more wearing of gears in sliding mesh.
5.Increased cost since tooth designed must be of high stability under fluctuating laods.
6. CMG contains easy replacibility of dog clutch but in case of SMG, failure is of gears, so if it fails than it requires time and money to manufacture new gear to perform the same task.
Last and most important it is preferable due to its more efficiency.
Thank you
please mark me as brainliest
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