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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Ball links too tight
12-18-2011 05:23 PM  9 years ago
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Stephen Born

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USA

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Ball links too tight
I just completed a build and the linkages to the swash and to the servos are REALLY tight. So tight that when I move the swash and center the stick, there is a slight delay before the swash is horizontal again. I was recommended to use a ball link tool to open up the linkages more. Are there any other options?

Thanks guys!
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12-18-2011 05:28 PM  9 years ago
helidevil

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Brunswick, ME

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flybar? flybarless? servos, voltages, any other specs.? links should be somewhat tight.
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12-18-2011 05:39 PM  9 years ago
Stephen Born

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USA

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FB Titan 50
Digital Metal Gear 4.8 v. Blue Bird 661 High Speed Servo.
The links are binding on the balls.
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12-18-2011 05:47 PM  9 years ago
BobOD

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New York- USA

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Here's an old trick to adjust without using a sizing tool.

To make it less tight:
Snap the link onto the ball. With a pliers, squeeze on the OD of the link (on the outer edges). Start with a little pressure and increase each time. The plastic will yield resulting in loosening it. It takes some practice but you can fine tune to a precise fit this way.

To make it tighter:
Take the link off the ball and squeeze the faces of the link. (90 degrees from the above). Best to use a flat face vise here but I've managed with a pliers. When the plastic yields squeezing this way, the ID will become smaller.

Again, this takes some practice and you don't want to be going back and forth with it...so best to have some spare links on hand if you over squeese. With practice, you can fine tune them in 2 seconds.
Team POP Secret
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12-18-2011 06:09 PM  9 years ago
Stephen Born

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Thank you BobOD. I will try this.
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12-18-2011 07:26 PM  9 years ago
Peter Wales

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Orlando Fl

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I put a ball in a dremel and put it onto each link in turn. Spin it up to a low/medium speed until it runs freely. The plastic will melt where it is too tight, so leave it on the ball for a couple of seconds until it hardens again and then you have a perfect fit.Peter Wales
http://scalehelicopters.org
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12-18-2011 07:31 PM  9 years ago
Steff Giguere

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Use a ball link sizing tool, like the Botos Sizer.Team Synergy, Rail blades, Team Scorpion, V-Team
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12-18-2011 07:36 PM  9 years ago
Stephen Born

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Peter Wales

Now that one is very intuitive. Have you ever tried that technique before?
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12-18-2011 07:56 PM  9 years ago
datidun

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N Ireland

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The best thing to do is go to Helifreak the top of the list is one of Bobs videos called ball links 101,he explains how exactly how it should be done
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12-18-2011 08:30 PM  9 years ago
JOLT

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Baltimore, MD

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The best tool that I put off buying was a ball link resizer. I finally bought when and used it to ensure all linkages were smooth and free...but not too free. Probably the best 10 bucks I have ever spent. The heli flew so much better and I wouldn't think of building a heli without one.
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12-18-2011 08:39 PM  9 years ago
Peter Wales

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Orlando Fl

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Now that one is very intuitive. Have you ever tried that technique before?
I have just finished resizing every darn link on a chaos 600 and now links that were too tight to move are a perfect fit
Peter Wales
http://scalehelicopters.org
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12-18-2011 10:07 PM  9 years ago
GREYEAGLE

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Flat Land's

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Use a bit of caution : Depending on the resin they were injection molded with, they can be pretty hydroscopic - sizing can, and may change with the surrounding humidity depending on the season.

Those that I've sized - just by leaving a ball in them mounted on a dowel - I give them a touch of type writer white out so I can identify them in the summer. I've had a few in the summer that were "new" and I could literally lift them off. Both MA and TT's. Seem's in the winter when the humidity is low the & out of the pack -new ones are very snap tight. I've never reamed any .
greyeagle
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12-18-2011 10:41 PM  9 years ago
chopper_crazy

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Delphos, Ohio

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I would suggest getting a ball link sizing tool. It is a great investment and one that would use for a long timeIt's a complex, costly, glow powered anti-gravity machine!
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12-18-2011 11:43 PM  9 years ago
dkshema

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Cedar Rapids, IA

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+1 on the sizing tool. There just isn't a real substitute for the correct tool for the job.

I've tried the Dremel method, it can work if you're real careful, but then you can also just mess up a bunch of links while figuring out the "right" speed and heat.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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12-19-2011 12:10 AM  9 years ago
Flying Brian

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St. Clairsville, Ohio

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JR ball link tool, cheap and very easy to use."I just don't Listen" "
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12-19-2011 12:46 AM  9 years ago
mcfast

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Quebec Quebec Canada

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Get a ball link sizing tool!P.S. sorry for the spelling or the grammar I am dyslexic!
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12-19-2011 03:33 AM  9 years ago
rpat

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Weirton, W. Va.

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If you are going to use that sizing tool I hope that you have a lot of extra links. Just a little too much taken off and bingo it useless. I remember when I built my Lepton the balls were really tight, so I was getting the ball link tool out and a guy stopped me from using it. He got a standard set of pliers and started squeezing them right on the balls and a couple of times around all of them and every thing was good.trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2
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12-19-2011 04:08 AM  9 years ago
Stephen Born

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USA

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rpat,

That is the other option BobOD suggested. This is why I started this thread. There is always another way of doing things, and I wanted to pick some brains.
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12-20-2011 11:21 PM  9 years ago
toejab

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Buffalo ,New York area

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rpat
been there,done that...dont do more that a couple of turns with the ball link tool...otherwise a crash is in your future when the link FLOPS OFF.
IF I AIN'T FLYIN' - I'M PROBABLY BUYIN'
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12-21-2011 12:15 AM  9 years ago
BobOD

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New York- USA

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started squeezing them right on the balls and a couple of times around all of them
Yup...easy, and can be fine tuned to perfection as it's not a "blind" adjustment. And reversible to some degree.

As mentioned earlier, not all plastic cuts the same, temperature and humidity will effect the cut of the sizing tool as well. I have sizing tools but haven't used them in years.
Team POP Secret
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