crash2
-Oh no I picked a side-
Anybody know if the gripping force on a serpatine drive belt is different between a cogged style and a non cogged style?
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Drive belt---serpatine
- Thread starter crash2
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84Toyota4x4
Well-Known Member
If youre talking about a coged belt like what a roots style supercharger setup might use, or a motorcycle drive belt style, then those definitely have more gripping force since it drives almost the same way a chain does.
~T.J.
EDIT: Realized you could be talking about the serpentine belts that are dual grooved. They have the ribs for the groves in the pullies, but then they also have the cogs going across, so its almost like a tank tread. If youre talking about those, then I could hypothesize that the gripping force could be more on the inside bends of a pulley (think tire siping), and also longevity of the belt would be greature due to the areas allowing for expansion on the outside bends of a pulley.
~T.J.
EDIT: Realized you could be talking about the serpentine belts that are dual grooved. They have the ribs for the groves in the pullies, but then they also have the cogs going across, so its almost like a tank tread. If youre talking about those, then I could hypothesize that the gripping force could be more on the inside bends of a pulley (think tire siping), and also longevity of the belt would be greature due to the areas allowing for expansion on the outside bends of a pulley.
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crash2
-Oh no I picked a side-
My reference is a multi ribbed belt.
So my assumption is a non cogged belt has more gripping force than a cogged one--due to more surface area against the pully.....
I am just wondering if my assumption is correct...
So my assumption is a non cogged belt has more gripping force than a cogged one--due to more surface area against the pully.....
I am just wondering if my assumption is correct...
WHITE TRASH1
fruit stripe
I'd think the cogged serp belt would have more grip due to less surface area coming into contact with the pulleys... Although I could be completely wrong on that. :haha: But along the same thought I'd say the cogged belt would clean out mud and water better too.
Glenn
Well-Known Member
Then what is the main advantage of a cogged belt over one with smooth gripping surfaces? Does that design dissipate heat better? There must be a compelling reason they are made that way.
64FJ40
Well-Known Member
I always assumed it was to alleviate the stress on the thinner rib sections from the constant in/out bending that a serpentine belt sees. It seems like continuous ribs would get heat and stress cracks much sooner.
And when it's bent around a pulley, it seem like most of those gaps would be closed up, making basically the same amount of gripping surface.
On serp belt youll notice Gates belts are continous ribs,3,4,5,6,etc ribs running the length of the belt.They dont run any grooves horizontily across the ribs.
Dayco runs grooves horizontily across there ribbs,they claim it makes the belt run cooler and gives it more flex for running it on the back side of idler pulleys.Gives the belt longer life.
I dont know if either grips better than the other.But the dayco is supposed to have a longer life span(more flex and runs cooler)
I would think for our wheelin application the dayco belt would be the way to go.The cross grooves would help spit the moisture and othere **** out of there.Like white trash mentioned.
Dayco runs grooves horizontily across there ribbs,they claim it makes the belt run cooler and gives it more flex for running it on the back side of idler pulleys.Gives the belt longer life.
I dont know if either grips better than the other.But the dayco is supposed to have a longer life span(more flex and runs cooler)
I would think for our wheelin application the dayco belt would be the way to go.The cross grooves would help spit the moisture and othere **** out of there.Like white trash mentioned.
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84Toyota4x4
Well-Known Member
That was my exact thinking. Although, on the inside bends, the closed gaps could act like tire siping as well and possibly provide MORE gripping force.
~T.J.
Harvester of Sorrow
Well-Known Member
Mike...
Whether cogged or ribbed serp belts are employed...what is important is the amount of wrap on any powered pulley. This alone is different for both styles of belts and needs to be addressed in the layout of tensioners what you are doing.
So to answer your question...Cogged or "timing" style of belts can accept less pulley wrap than a ribbed or non-cogged belt.
The other advantage to to Cogged "timing" style of belts is for just what the name implies...They are used to ensure a direct drive ratio that does not become effected by slippage.
Werd...
Whether cogged or ribbed serp belts are employed...what is important is the amount of wrap on any powered pulley. This alone is different for both styles of belts and needs to be addressed in the layout of tensioners what you are doing.
So to answer your question...Cogged or "timing" style of belts can accept less pulley wrap than a ribbed or non-cogged belt.
The other advantage to to Cogged "timing" style of belts is for just what the name implies...They are used to ensure a direct drive ratio that does not become effected by slippage.
Werd...
zukkev
Cornfuzzled yet again...
Gates actually does make a 'grooved' belt, the GatorBack---I also think the grooved style would help with keeping the pulleys clean/dry-but it's just an opinion...What's more important is the amt of wrap you get on each of the accesory pulleys, as mentioned earlier....
