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  #1  
Old 03-05-2006, 09:27 PM
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Post Gears ratio

Hey Is short gear stronger or long gear stronger ???

And what would u perfer and y
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Old 03-05-2006, 09:29 PM
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Length of the gear doesn't depict the strength.

Width of the gear generally controls strength due to the larger surface area. Straight cut gears are generally wider I think..
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Old 04-05-2006, 09:03 PM
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sorry but just a question, don't know shit about the insides of a box but, when u say "straight cut" is that haveing the theet cut sideways through the gear?? if so wouldn't a "angled cut" gear be stronger with the larger surface area?.. plz correct me if i have missinterpeted the meaning here
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Old 04-05-2006, 09:12 PM
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All your answers are here, in regards to straight vs helical cut.

http://www.perth-wrx.com/vb/showpost...8&postcount=22
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Old 05-05-2006, 03:15 AM
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Its a good point, because the speed the shaft is spinning will affect the force applied to the gear...
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Old 05-05-2006, 06:42 AM
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Yeah, you'd think a helical gear is stronger than a straight cut because the tooth angle creates an extended length of contact, which results in a higher tooth contact ratio and the load being distributed over a greater area.

BUT, a straight cut gear has a better directional load placed on each gear tooth, which therefore makes them strong also.

The MAIN reason they are used in a performance gearbox, is they are easier to cut, they provide much less friction and they dont suffer from thrust loading, which can place strain on bearings and gears.

Last edited by BALISTC; 05-05-2006 at 06:45 AM.
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Old 05-05-2006, 06:42 AM
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up early joe.
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Old 05-05-2006, 12:04 PM
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I think you are asking about gear ratio's ?! Short Gear ratio's will give good torque/acceleration but a lower overall speed. Long gear ratio's will give you a lower torque/slower acceleration but a higher overall speed.
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