flite possitive tire balencer

[wizardlockman]

i have recently purchest a flite possitive wheel balencer (bubble type) model # 772A made by wilbur c rexroat D.B.A. dynamic center engineering co inc in lawrenceville ga possable for hoffman global inc patent # D181107 this is a strange but useful balencer if someone could tell me how to use it this unit is not a typeical bubble balence it is some type of static or dynamic bubble ballence it looks wierd becouse it has three arms two with rubber pads one with a counter wieght mechanism with two weight measers and a arrow and bubble between then they are in onces one for up wheel one for down wheel any help would be great please look at pics completly as this will help to identify this unit also possibly for sale if price is right

 

[wizardlockman]

you know i realy thought someone on this site might have something to say about this device i guess this machine is to odd for you guys

 

[Keep]

Thats a pretty cool little machine. No idea how to use it but still cool.

 

[wbrian63]

"I think"

Remove all existing weights from the rim.

Put the rim/tire on the machine - be sure it's centered in the cone - I'll bet the crank is used to move the cone up and down. The tire should sit on the pads.

Mark the tread of the tire with a tire crayon in line with the arrow that passes thru the bubble - this is your reference for the weights.

Use the knobs to move the pointers back and forth until you get the bubble in line with the arrow.

Attach rim weights to the front and / or back of the rim in amounts as indicated by each dial (WT UP RIM is the weight for the front of the rim, the other is for the back). . The weights should go (I think) on the rim adjacent to the line, closest to the operator.

Put the tire back on the machine and line the arrow up with your crayon mark - check the bubble to see if it's still in the right place.

If so, turn the wheel 90 degrees and try again.

If you want a really fine balance, start at 0 (first balance), then go to 45 degrees rotation, then 90 degrees, and maybe even to 135 degrees.

If it's done right, after that no matter how you set the tire on the machine, the bubble will be inline with the arrow.

"I think" that's how it's done.

 

[daveroy]

"I think"

Remove all existing weights from the rim.

Put the rim/tire on the machine - be sure it's centered in the cone - I'll bet the crank is used to move the cone up and down. The tire should sit on the pads.

Mark the tread of the tire with a tire crayon in line with the arrow that passes thru the bubble - this is your reference for the weights.

Use the knobs to move the pointers back and forth until you get the bubble in line with the arrow.

Attach rim weights to the front and / or back of the rim in amounts as indicated by each dial (WT UP RIM is the weight for the front of the rim, the other is for the back). . The weights should go (I think) on the rim adjacent to the line, closest to the operator.

Put the tire back on the machine and line the arrow up with your crayon mark - check the bubble to see if it's still in the right place.

If so, turn the wheel 90 degrees and try again.

If you want a really fine balance, start at 0 (first balance), then go to 45 degrees rotation, then 90 degrees, and maybe even to 135 degrees.

If it's done right, after that no matter how you set the tire on the machine, the bubble will be inline with the arrow.

"I think" that's how it's done.

ONce you place the tire on the machine and get contact with pads turn wheel on machine till bubble points in direction of arrow... no line on tire yet... this just sets the light end of hte tire in the right direction to start.

move knobs until bubble is centered... read numbers... add weights as indicated. DONE!


To check work... move knobs all back to Zero.. place tire in any orientation on machine... bubble should be centered.

 

[wizardlockman]

you know it is a cool machine especialy considering it was made in the mid 1950s as far as front and back nope that is what i thought it is up and down on rim and those screws devices are counter wieghts to center bubble at one end not front and back its the arrow and the up and down that confuse me this is some type of non spining dynamic balencer in witchcase confuses me i dont understand how you can do this without spining wheel to put weights on both sides of wheel from bubble just dont seem right and allthough i have had alot of other respones on other sites everyone seems to agree on one thing that this is dynamic in nature but no one has either seen this device or knows anything about it and the patent has very little info about this machine allthough i can still use it like a standerd bubble balencer i would be nice to use it as intended my the inventer this is just a real rare cool old tool seems to be a one of a kind after the responses ive got but i know out there is some old school mechanic that has used one before unless there all dead this thing is pretty old but i know the first patent was submited in 1955 and aproved in 1957 so i would think someone knows about it besides the inventer who is dead

 

[RD_Atlanta]

I was able to acquire one of these 'Flite Positive' model 772A balancers recently. I realize this is a very old conversation but I'd really like to share experiences if someone has one of these. Working with wheel balancers has been an evolving hobby of mine. I attached a video of one of my Bear model 330 dynamic balancers that I've been experimenting with & modifying. The lasers are just an inexpensive way of amplifying the error on each soft bearing plane. The RPMs that I'm running here (with this tire circumference) is running at about 84mph.

 

[ArcReactorKC]

Bro 15 years.

 

[NUTTSGT]

Closed for now.

Open for business.

 

[firebirdparts]

Well, I don’t know how the flute positive dynamic balancer works but you certainly do have me curious.