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Dual 9mm belt project

belt
9mm

#1

Hey guys,

I have been working on this project for a little while now. I have read about people snapping/stripping belts and want to prevent that from happening to me so I decided on a dual 9mm belt setup. My dad is a machinist so I have access to all kinds of machines. I know I am going to have to modify mounts and trucks to make this fit but other than that it should be cake.
Here are the 2 rough cut pulleys as of now.



Both are aluminum. 14 and 36 tooth
Totally overkill but should look pretty sweet and allow plenty of torque transfer.
I’ll update when I get everything finished up (probably after holidays)


#2

Hey SK8ACE

The pulleys look awesome, what technique did you use to machine the grooves?

Have you thought about using 15mm belts? 5m HTD is available in 15mm as standard. I know that is slightly less than the combined 18mm width from 2*9mm belts but wouldn’t make much of a difference for the added simplicity. I know boosted boards use 15mm belts but they also use 3m pitch.

Jack


#3

Yep I thought about going with the 15mm but I thought it would be nice to run 2 belts as to have a backup if one failed (rocks or something poking holes in) Really no other reasons behind it lol.

The pulleys were cut down to width on a lathe and then cut the groves out with a cnc mill. Took a few tries to get the correct size and spacing.


#4

cool they look really nice, I have access to a waterjet cutter at Uni so was thinking of getting some pulleys cut, not sure how the kerf would affect the performance though. I might have a go at making some on my CNC router, its lacking the required stiffness for aluminium although possible its just slooooow.

The only thing I would say about using 2 belts next to each other is they may start to slip over each other during operation. If you made a thin plate that ran between the 2 that might work better.


#5

Thanks for the tip! I will do some testing when it’s done.

Good luck with yours!


#6

sweet be sure to share some photos when your done, if you’ve got any during machining i would like to take a look also :smile:


#7

Got the pulleys on and did a test run, so far so good!


I had to use a few washers on the inside of the axle to give it enough room to fit and line up the pulleys ( without modifying the truck/mount). Have just enough threads to hold the wheel on. Totally overkill but it’s done now :slight_smile:


#8


#9

Whose motor is that?


#10

That’s a Tacon Big Foot 160.


#11

How did you fit the 18mm on the shaft?


#12

That’s a tacon bigfoot


#13

How big is the shaft? I thought it was short like a SK3?


#14


#15

It overhangs a bit. Shouldn’t cause any problems.


#16

Yup! Never had an issue using these motors.


#17

I’m offended you’d ask such a personal question :blush:

Al…


#18

All joking aside, this is a great job by you and your dad! @sk8ace did the motor pulley end up with just teeth across it’s face? This really makes single drive setups bullet proof!

Al…


#19

Thank you!

Here’s a quick side shot,


#20

You can see that it’s open on one side and raised up on the motor side.