Like the ***le says, has anyone actually tested balancing beads on a tire balancer. I did a search and got lots of seat of the pants testimonials. But no one that I can find has actually put a known out of balance tire/wheel on a spin balancer after establishing that it was really out of balance. Then put beads in it and spin it again and show the results. I know truckers, 4x4 guys Hamb members, off road people, all say they work. Has anyone used a spin balancer and tested them? If so, tell me how you did it. and the results.
are you talking about verifying that the balance machine is balanced? or verifying that the tire is balanced after you put the weights on the wheel?
There are quite a few that have tested it......... Check out the You tube video 2nd hit down.... https://www.google.com/#bav=on.2,or.r_qf.&fp=f78f151ded662820&q=balancing+beads+test+spin+balancer
How many golf balls were used in the 4 x 4 tires? I've used the 'air soft pellets' in p***enger car tires with good results. Used a bubble balancer first then put in 250 pellets @.25 gram/pellet.
Since according to Dyna Bead they apparently cannot be tested on a spin balancer, as the OP questioned, we have only to rely on seat of the pants testimonials. I also bubble balanced mine first, then added 4oz. of airsoft pellets per tire. I think it worked, it was smooth up to 70, then had some vibration up to 75, then smooth after that. I think I have a rear wheel bearing going out so that may have been the vibration. For $25 I got enough to do two cars so I'm going to try them on my pickup next.
Yes. I ran them in a set of bias-ply off-road tires, of a type known to be nearly impossible to balance, and rarely close to round, on a vehicle which is design-prone to death wobble in the front suspension. Smooth to 85mph. Not a solitary wheel weight on the vehicle.
Note the difference between a stationary balancer and the active path of a wheel in motion. Click the bicycle wheel video........... http://www.animations.physics.unsw.edu.au//jw/rolling.htm
That's a "seat of the pants testimonial" that works for me. I have to take my big 4x4 tires over the hill and find a Hunter 9700 Road Force balancer to get them to ride smooth.
I was just thinking that if dyna bead says they have to have the weight of the road on them, the road force balancer at work should do the trick?
Good point, has anyone ever tested the balancing beads on a road force balancer, to see if they bring an out of balance tire/wheel into balance without wheel weights?
They don't balance anything, and don't claim to (as far as the last time I looked). They cancel out vibration caused by imbalance. Balance on a wheel and tire ***embly is a p***ive function. Beads are an active, dynamic operation. There is no direct functional comparison. They are different processes. I have torn off fist-sized chunks of tread on the edge of a set of huge bias Super Sawmper TSL's on the trail, and then just driven home reasonably smoothly. There are functional limits. A manageable ride, with a quarter-pound of rubber torn off, is good enough for me.
So they are not really balancing beads, but anti vibration beads? I am having a hard time wrapping my head around this. Thanks to all who have posted, and any more thoughts on this keep it coming, I need all the help I can get to understand the principal behind this.
the company used to work for used them religously on the road trucks , and they work well better than the bag of balance powder we used to use , only problem with them is if they get dinged so the balls don't roll smoothly or they get a hole in them and the oil comes out , then they will shake like a paint shaker loosley mounted on a bench ( I had one come apart when a tire blew out )
yes the semi trucks use oil in them besides ballbearings ( centramatic brand ) , I think its to dampen or slow any movement if there is a sudden change like a real rough road . as the powder a rough road would take about 5-10 mles after to straighten out and rebalance because it being knocked around . also if you use this type of balancer you have 2 types one for drives and one for the steers . you cannot interchange them .
Physics. Fluid dynamics. Static Weight balance and adding beads are two very different ways to accomplish the same result- anti vibration of a rotating m***. Ever balance a drive shaft by adding some oil to the inside of it? It's crude but works very well at canceling the vibrations. What about fluidampner balances, they work well too.
My guess it is similar to one of the orange plastic "dead blow" hammers. They are also filled with powder/pellets depending on brand. In the hammer there is a little time delay between the time the hammer strikes and the beads stop moving. As the hammer starts to bounce, the beads strike the inside of the hammer head and cancel out the bounce.
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