Hopefully I'll be looking at a Bear Precision Dy-Namic Balancer this weekend. Its a craigs list find, some what local. I was able to look up the Patten numbers from its tag and get so interesting info. I would like to balance drive shafts, but I like have the capability to balance other rotating assembly's. I know its old technology and not as accurate as todays computer balancers. Does any one have an operators manual for it? Or any other experience? What do you think? What would you pay?
If you have 3-phase elec. service , you're good to go , otherwise you're gonna need a phase converter , they ain't cheap.... dave
There was a company selling electronic converters on ebay some years ago. Mine was $ 75. Purchased so I could use a milling machine. Working perfectly. Anderson or Andersen from maybe AZ or western states. mine might have contact info for the company printed on it
I never operated the machine, but there was one in daily use back in the 60s or maybe 70s at the local Ford dealership. It took a bit longer, sometimes usewd more weight, but it could compensate for some other problems with the right tech on it. watched them balance mine and others, but never deciphered the operation.
Doyoulikesleds- My two small boys love helping with my projects and I love having their help. I got it opened up and took a look at what I have. Picture # 1 Brake 2 Brass ring with spark plug wires to dial 3 Indicator Dial 4 Control panel 5 Cut wires 6 Adjustable pedestal with built in pickups 7 Transmission 8 Running speeds Now to correctly get the wires re attached.
BZZZZT! Careful there...Volt/ohmmeter will be a good bet whilst matching wires. Take your time. Nice find, BTW. Properly balanced tires let you find all the annoying squeaks, rattles, and vibrations elsewhere.
Dirty Old Man- I hope to balance drive shafts that I cut down/make. The machine has the capabilities to balance automotive cranks or any other rotating equipment electric motor rotors. This piece of equipment was very expensive in its day.
Dan, I sent an e-mail to them. I also e-mailed Northwest sales equipment and sviinternational they did not have a manual or any info. The search continues.
This is about one part drive shafts; Drive shaft balancing,for any type machine you have to start with a pair of U-joint centering jigs+you'll need to make or buy, they hold the u-joints so the shaft spins on its ture spinning center,not off the drive shaft tube. Now in real life shorten drive shafts for hotrod an race cars are just that"Short" an if done right*** don't have to be balanced,but if done wrong,some times can not be balanced with out redoing them right. { what is right? first off cut short very sq./strait and dress U-joint end casting so it is also sq./strait,and when they are add to tube again they must line up with the one at the other end of tube= so when the joints are in,there axles are even. Many don't line the two ends up just right,so the shaft will vib. Also most shafts as made stock will have steel Wt. welded on at one end or both/don't remove them from the end you are not cutting off,but the cut end,you do not re-add any{except if you are going to balance the shaft=then only can add as needed. Most of the time it will not need balancing. I did this stuff for years before retiring,my shop was Comp. Tech Miami Fla.
Thanks for the insight, Dana. I'll have to make some centering jigs. The drive shaft ends must be square and straight along with being the same plane to each other.
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