Precision Kegal pulleys

They’re fully on there, here’s them with some non built in spacer bearings w/o washers:


The nylon grabs the threads this time, by only by a half bolt turn.

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then i don’t know, i can also check my set once i have them on hand

u got washer on there?

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This; maybe getting some 0.2mm axle washers (speedrings) would be of benefit over the standard 1mm type.

I’ve used them before but they are very difficult to source.

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…and sometimes you think you find them, but when they arrive, they just barely won’t fit on the 8mm axle…

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I believe DKP trucks have a 55mm axle (bn trucks are 50mm)…? You think could show me a picture of the pulley properly seated in the tb110?

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here

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Nope, with a washer on it’s exactly like the picture w/ the zealous bearings.
who wants some 36t pulllleysssss, ill trade

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This is what I’m looking at. If I hammer it in, it’ll warp the core. It’s sitting right on it.

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Oh yeah, don’t hammer that in

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@slizer18 @frame @b264 @Fromualdez
That is exactly how it should look. The flange on the pulley and the outer diameter of the kegal core are 47mm. When fully pressed in, the flange should sit directly on the core.
I designed these pulleys to work with axels 54mm+ The axels I made for my hangers are 10-8 stepped 54mm long. (8mm portion is the standard 34mm). I knew that BN had stepped axels 56mm long, and also 10mm 60mm long. I didn’t realize that the BN 220 axels were only 50mm long, which is about 3-4mm to short.
So, there are two solutions to this…

  1. I could drill and tap the pulley and provide and front cap and then you run them without a bearing on these shorter axel trucks. I know that is how everybody else is doing it.
  2. There is room in the pulleys to bore the bearing seat 5mm deeper. This would solve the issue for the 50mm axels. This would surely be the best option.
    I could do this today for whom ever is using the BN 220’s and get them sent out probably tomorrow or Tuesday. I will cover all the costs. (The pulleys you have will still work perfectly with the longer axels)
    Cheers, Phil
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Yes, I hate those as well, but I had a couple people ask if the pulleys fit them, and I had that laying around.


I like this one better

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Wow… you’re awesome. I’d love to run it with bearing.

Can someone check my math? Depth of the face of the pulley to the bearing is 12mm. Adding another 5mm makes it 17mm.

Hangar length is 220mm.
Motor mount is 8mm x2
Motors are 81mm. x2
Pulley adds 17mm. x2

So 212mm worth of equipment on a 220 hangar. I’m pretty sure this works…

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If you are wondering about the clearance between 6380 motors, your good, as far as the pulleys go.

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If you ended up seating the bearing further in, would it be able to clear the hangar?

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Yes sir, I bored a 34mm pocket 6mm deep to accommodate for that!

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Just hit 250 miles on the 36T version of this pulley on a single 6374 setup with a 12mm belt.

Previous setup was a 3d printed PETG pulley that was bolted on

Pros:

  • Very smooth operation. I didn’t realize the difference this would make until I rode it. It’s difficult to get the 3d printed pulley perfectly round with the correct X/Y scaling to make the belt teeth to mesh perfectly with no wobble.
  • Fits into the Kegel core and holds the bearing with no slop. Uses a standard skateboard bearing.
  • Pressed in design vs bolted is easier to pull a wheel and swap a pulley if you wanted
  • Rocks don’t get embedded into the pulley like the plastic ones. They still get stuck in the teeth, but come out a lot easier and don’t leave damage behind.
  • No slipping at 80A. At all. Even with no tensioner. To be fair this was rarely a problem on the 3d printed pulley. 16/36 12mm

Cons:

  • Cutting the stock Caliber II hanger to fit the pulley means I need a bearing spacer & 3 speed rings to get everything to tighten up without binding. This can be solved by buying a boardnamics hanger, or trimming the hanger on a lathe after measuring the exact dimensions.

Overall I don’t think there is a better Kegel pulley out there, and the price is very reasonable

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While I do suggest the lathe approach, there is another way if you dig into the LHB archive way back to 2016

or, the better way

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Bit late to this party… are these still being made and sold? Dead keen on a 60t set

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I only made a few 60T, but I do think I have one more set. I’ll PM you.

Gonna need some more once those Radium wheels drop :fire:

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