Dynamic high speed balancing services

[justski]

Glad to tell you how I did mine and I am sure there are other ways and you can get nuts quick.
Do you have a magnetic type balancer? If yes just take a Sharpe marking pen and put a line on the shaft end to end. Now spin it in the balancer a few times. It will be in balance when the shaft does not always stop in the same location like the prop does when you started working on it and it's heavy on one side. If the shaft ends are ground in the center, and finished so the shaft runs true plus stops anywhere your good. There is the possibility of a shaft being pulled to one spot by magnets something to do with the metal.
Now if you have an Octura Prop balancer 'steel shaft which rolls on steel shafts' or one like it you do not have any ends to be ground centered. Just level it and roll the shaft noting the position it stops in every time. Remember the Tether Boat racers used a block of wood and two razor blades and ran 150 and higher mph.
Pay close attention to the balance shaft fit into the propeller. If the hole in the prop is too loose it will not repeat and you will be happy to take the wife out for a dinner.
Mike

Thanks Mike ...i was just looking at my balancer and just watching the shaft spin with a prop on i can see my shaft move up and down on one the end that dont touch the magnetic

[Mike Caruso]

Now the hard part is to get the tip in the center. Very hard to do by hand let us all know what you do to get it centered. Someone on here has shafts already ground I was looking for him as I want to buy a few 3/16 and one 1/4 for someday LOL I tried searching and he even said he made 3000 pcs to get the price down. I guess I used the wrong search words.
Mike

[justski]

so i guess that is what throwing me off...i been working on this prop for awile now and its like ill almost get it and take it off the shaft to work on it and then its way off again .nothing like making a person nuts well more nuts

[R.J.S]

Save your sanity,just buy your sharpened and balanced props from OSE,and don't even check them!You'll have a lot more FUN!!!

[Mike Caruso]

Thats another way to do it. There are some very good people that can do up props. Some of us guy's just like rubbing, tweaking, bending not just props but everything LOL
Mike

[justski]

Thats another way to do it. There are some very good people that can do up props. Some of us guy's just like rubbing, tweaking, bending not just props but everything LOL
Mike

THANKS ALOT MIKE!!!! now my wife wants to know where you live ..LOL..........i think thats what i am going to do is just buy them balanced ...less i can get this balancer fixed.. i just bought it knew one would think it should work with out pi$$ing people off...LOL....

[Mike Caruso]

Ah you'll get it done now easy. Tell the wife North Side of Chicago with my cutie wife of 44 years. Well that is one of the problems with Hobby's and everything else. If it's cheap you get what you pay for! Good stuff costs good money and great stuff cost stupid money. So after many years I just set an amount to spend each year on my hobby. So good luck.
MC

[Basstronics]

I was able to dynamic balance on my new magnetic balancer . I found that the blades were of even thickness yet the hub was heavy one side. So I used my center drill to remove some material. Worked like a charm . Now it rotates and stops randomly instead of the same spot.

I'm sure is not as accurate as what schenck is doing but good enough for me .

[properchopper]

While we're at it, a few of my indispensable prop tools :

For thinning : (been posted before, but a favorite)

DSC04806.JPG


To insure equal blade length after reducing diameter

DSC04804.JPG


Super Hi-Tech Cupping Anvil **

DSC04802.JPG


** Super Hi-Tech Cupping Anvil can be found at local Thrift Store for $2 - $5 (comes with free corner lamp)

DSC04805.JPG

[Cooper]

While we're at it, a few of my indispensable prop tools :

For thinning : (been posted before, but a favorite)

[ATTACH=CONFIG]104348[/ATTACH]


To insure equal blade length after reducing diameter

[ATTACH=CONFIG]104349[/ATTACH]


Super Hi-Tech Cupping Anvil **

[ATTACH=CONFIG]104353[/ATTACH]


** Super Hi-Tech Cupping Anvil can be found at local Thrift Store for $2 - $5 (comes with free corner lamp)

[ATTACH=CONFIG]104359[/ATTACH]

Love those free gifts when they throw them in!!!! My anvil had wedding name cards in it!! Sitting on the table! Go figure!!! Lol!!

[Mid Day Machining]

I may be missing the point ( happens to me a lot) but going to great lengths to achieve optimum balance, statically and/or dynamically and then mounting it up linked to what usually is an out-of-balance drive dog makes me wonder. This has been addressed before and the answer seemed to be that the entire drive line needs to be balanced as a unit before maximum results are achieved. If anything, since this thread is about props only, and the prop/drive dog mate up as one, I'd think balancing the prop/drive dog together makes sense. Just sayin'..........

You're right Tony. It's not going to do any good to have a prop that's balanced dead nuts unless you balance all the rest of the rotating parts.

If you were turning your prop 1,500 RPM, it wouldn't make much difference. But you're not. You're looking more for the 15,000 to 20,000 RPM range.

[Cooper]

How true your statements are about complete balancing. I decided to make my own shafts that have the drive dog and shaft all one piece. I can match props to these shafts and use a bullet nut or clinch nut and balance it all as one unit. Then I can attach flex line, loc-tite it. The tolerances are key to attaching flex shaft. I cannot see how I could balance the shaft with flex, if someone can figure that one out,,,,,,,, but this is what I have come closest to a completely balanced driveline. I don't have any other pics, the pic was just the first ones made and some refining has been done. Plus they were stainless and I later found out they were not strong enough so new ones made out of tool steel and will be hardened and ground instead of lathed. I only have needed this or a saw set up 100mph+ cat in excess of 12,000 watts running almost 50k rpm.

[Gary]

Is that 50,000 in the water or calculated rpm? Thanks

[Cooper]

Is that 50,000 in the water or calculated rpm? Thanks

48k+ in water under load

[ray schrauwen]

Cool stuff, subbed