B
bakalorz
Guest
You have a good method for balancing you can link to? When I did the Cheng Shins I think I played with weights until they didn't stop in the same quadrant four out of five spins.
Unless you have an electronic balancing machine like the tire shops, just put your axle through the wheel and support it on two jackstands. Rotate the wheel slowly, notice where it stops. Rotate it about 90 degrees, see where it stops. As you mentioned 4 out of 5 is pretty good.
Try this, it works MUCH better: (its hard to explain, but really easy to do)
Put the wheel/axle on the jackstands as above.
But instead of spinning it and seeing where it stops, leave the wheel stationary.
Now just put the tip of your finger on top of the bit of axle sticking out of the wheel and resting on the jackstand.
Now use your fingertip to roll the axle back and forth an inch or two on top of the jackstands ... back and forth, back and forth, back and forth ...
(go as far and fast as is easy/comfortable; half an inch to an inch, 1 or 2 times a second is good, the distance and rate don't matter within very wide margins)
The axle will be rotating as it goes back and forth, but the rotational inertia of the wheel keeps it stationary. So the wheel bearings are alternately transmitting very slight torque clockwise and anticlockwise to the wheel, regardless of if the wheel is turning very slowly or not. And these torques average out to zero, regardless of if the wheel is turning very slowly or not.
What this does is to reduce the (already low) friction of the wheel bearings to effectively almost zero.
So the tiniest bit of imbalance will cause the wheel to rotate to heavy spot down.
It seems like it couldn't work, or magic or something, but it really does work, and work well. If anyone really cared, its possible to prove it works using math and engineering, but thats way to much work for me ...
Just try it and see if it works for you.
Please note that when you are close to balanced, the wheel will only move very slowly because there is very little weight driving it.
Also, it should be obvious, but you have to keep rolling the axle back and forth the whole time you are balancing.
Using that method makes it easy to balance to within less than the smallest increment of wheel weight they sell (1/4 ounce I think)