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Would someone who has received an ASP grooved pulley tell me about the grooving.
I would like to know:
1) How wide and how deep are the grooves cut into the pulley ?
2)How far appart are they spaced i.e. how many are there ?
I don't have an ASP, I have a local one.
The grooves are about 1/16" x 1/16". There are 5 of them, equally spaced. The guy was afraid to cut them any deeper because there wasn't much material underneath them.
John,
If I'm not mistaken, you ran your grooves in the same direction as the belt travel. Where as ASP grooves their custom pulleys perpendicular to its travel. Do you or anyone else think one versus the other is superior combined with your wrap to reduce slippage?
You're right, mine run in the same direction as the belt.
I think the benefit is in allowing the air to escape, and with the grooves in the same direction, it seems like it would be better because the escape path is continous.
But the guys with a ribbed pulley setup, don't have any option except to cut the grooves across the ribs... So that must work too.
John, what would you recommend. I'm sending my PD for a rebuilt next week (just upgrading my bearings and belt) and I'm taking a pulley to be smooth out to a machine shop and inodized or powdercoated as well.
But I do plan on putting grooves. Should I do the circular groove or the side to side?
Right now I do have circular, but I think I did it wrong. Because I have 6 of them at 1/32" wide and deep. It sort of worn out the belt even quicker. I was thinking of doing just one circular groove at 1/32" or 1/16" at the very center of where the belt would go. But I'm debating if I should just do 5 side to side grooves.
I don't have any experience with the side to side type, so I can't really add too much to that part of it... Only I know on the ribbed pulleys, the side to side grooves are large, and the edges are rounded. I'd be concerned about side to side grooves possibly shaving the belt when there is some slippage.
Not sure why your circular grooves would wear the belt out quicker, unless there were some rough edges, or a lot of slipping going on. If everything is tight (and well wrapped) seems like they'd be fine.
"But the guys with a ribbed pulley setup, don't have any option except to cut the grooves across the ribs... So that must work too."
John,
I'm confused by this statement. Are you referring to pulleys that run on the rib side, unlike ours ?
I bought 1DangerousV6's used kit and got a 3.12" & 2.75" non grooved pulley's. I'm looking to experiment with the 3.12" before I do the final groove pattern on the 2.75" pulley. It would seem that it would be easier to run the grooves in the same direction as the belt travel, so why does ASP groove them side to side if there is no benifit ?
Yeah, I threw that in there, just to say I can see a definite reason for the side to side grooves in one case. But it was about the kits that use the ribbed side of the belt.
ASP may just have the side to side grooves already set up on a CNC machine... I don't know of anybody who has done any comparison testing.
Greenglow,
Sounds to me like you're in favor of running the grooves in the same direction as the belt. Do you remember the specifics of your 3.1 pulley groove pattern ? How many? how deep? how wide?
Originally posted by 1998mibird: Greenglow,
Sounds to me like you're in favor of running the grooves in the same direction as the belt. Do you remember the specifics of your 3.1 pulley groove pattern ? How many? how deep? how wide?
Correct me if I'm wrong Laron, but I think he told that at the center where the belt would land there is one groove that is about 1/32" wide and deep and six very thin line grooves on each side of that.
I think this creates an escape route for the air when the pulley and belt meet. Which means that the belt sticks better. The same concept of our tires to the pavement. Hope that helped.
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