Who can balance a flywheel for me.

[skialot2]

Buy a cheap wheel balancer and do it yourself. They work great and are easy to use. If the flywheel is out of balance, the heavy spot will end up on the bottom. Remove a little material from the heavy spot to balance it.



Amazon.com: JY PERFORMANCE Motorcycle Wheel Balancer, Tire Balancer Stand for Static and Dynamic Tire Alignment, Bike Wheel Balancer for Motorcycles, Road, Sports, MX, and Dirt Bikes Wheels : Automotive

[Carter Powell]

The flywheel does not have bearings in the hub so you could not get an accurate reading with this type of balancer. Carter

[David - WI]

The flywheel does not have bearings in the hub so you could not get an accurate reading with this type of balancer. Carter

The shaft runs on bearings.

[skialot2]

The flywheel does not have bearings in the hub so you could not get an accurate reading with this type of balancer. Carter

The shaft rotates on its own bearings on the stand. It stays tight on the flywheel.

[JCSmile]

I'm thinking of trying the static test stand idea on a couple flywheels I have. I wouldn't trust it if I was a drag racer but I'm guessing the production ones weren't balanced either. I have had a few old aluminum ones lose bits of magnet or start to lose some material on the ring gear. I suspect they would show they are lightly out of balance and I never had any issues with crank wobble or bearing failure. 10k or more I'm sure is a different story.

[Onetime]

Carter,
Just spoke to my local automotive machine shop that balance automative engines.
They said no problem. Would think a local automotive machine shop that balances car engines by you could do it.

Dont just static balance it like others are saying. It’s spinning way more rpm than a tire and needs to be dynamically balanced.

[KIRCHNER]

that should work fine, i have a few lightened to check + a stock one. great post, im gettin me one, thks. had some water jet work done on a flex plate, couldnt find a balancer..

[Carter Powell]

Thanks for all the replies. I will start calling auto machine shops and see what goes. All ideas are really appreciated.

thanks, Carter Powell

[LakeFever]

I can appreciate the thoughts that dynamic balancing is superior but in the case of a flywheel especially one so thin how much dynamic shift can there be unless the part is not stable or insufficient for the task? These things are an inch thick give or take. Balanced is balanced after all it’s not as if a flywheel that’s perfectly balanced using the static method is suddenly going to show an out of balance condition with a dynamic test unless some state changes during rotation. Think about it. Now go take some more complicated shapes and bob weighted parts ok fine dynamic makes sense. Even props are just static balanced. I’ve watched Indy car pit crews use bubble balancers for their tires too.

So let’s say you find an auto machine shop to balance one. The only way to dynamic balance a mercury flywheel is to have a spline hub to bolt it to. Do you think the average machine has that? Or will they be static balancing and send it out knowing it’s good?

[skialot2]

When I was a kid back in the 80s I used to balance wheels on an old school manual wheel balancer. I always static balanced first. Then I would dynamic balance and always needed much less weight after static balancing.

Static balancing and dynamic balancing do 2 different things. On wheels, static balancing equals out the weight so the tire doesn't try to bounce up and down while spinning. Dynamic balancing stops the side to side wobble. On a flywheel I personally think static balancing is more important than dynamic.

[Onetime]

Don’t need a spline to match the splines in the flywheel. It would be mounted on an arbor between tapered cones.

[Chaz]

The only balancers I know that use tapered cones are wheel balancers at motorcycle shops and very few have them. Might do a light 2.5 flywheel, but I doubt they would touch any of the heavier cast iron wheels.

I made up these stands a long time ago. I used a scribe to pull the seals out of the bearings. I clean and lube them each time.

If I'm just doing a flywheel, I do it on here. If I'm doing a crank and flywheel, I rough it in on my stand and then have my crank guy do both together as a unit.

In order to have him do just flywheels, I would need to make an arbor and a nut that were at least a foot long each in order to spin the whole thing with the belt.

As far as speed, most machines run between 300 - 500 RPM.

[David - WI]

Also, he isn't building the flywheel from scratch or piecing it together from random salvaged parts - he's just trying to get it back together the way it came apart. It should have been pretty good as it came from Merc originally.

[Carter Powell]

I have checked 6 automotive machine shops that balance things, HINES balancers, real high tech but none will fit thru the spline area. There has got to be someone in the USA that can do this. CRAP!!!!! Carter

[25two.stroke]

Alex (OX Performance) builds flywheels as well...he may be able to get it balanced, but maybe not with the hub?