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T-REX 250 › resizing ball links
04-01-2009 02:28 AM  9 years agoPost 1
larry1

rrApprentice

clinton twp. mi

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Hey guys, cant find exactly what I am looking for.

My head on the 250 is pretty tight and is causing it to be "pitchy"

what is the trick to resizing the ball links to eliminate the extreme tightness?

I dont have a ball ling sizer that is that small.

I am sure there is a simple trick to doing this.

please advise.
larry

It's a beautiful day, sun is shining and the birds are chirping! Watch, some idiot screw it up

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04-01-2009 02:32 AM  9 years agoPost 2
Heli 770

rrProfessor

USA.

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Heli Direct has a ball link tool to size those links.

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04-01-2009 02:33 AM  9 years agoPost 3
george0079

rrElite Veteran

USA

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The easiest way...

Take a spare main shaft, and linkage ball. Score the ball with a hobby knife, or a pair of pliers. Screw the ball int the end of the main shaft....

Now, you have a home made ball link sizer.

Just be careful on how much of the link you remove.

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

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04-01-2009 02:34 AM  9 years agoPost 4
larry1

rrApprentice

clinton twp. mi

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perfect,
thanks george!

It's a beautiful day, sun is shining and the birds are chirping! Watch, some idiot screw it up

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04-01-2009 02:59 AM  9 years agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

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In the spare parts bag is a hex aluminum standoff, the kind used between the frame halves. Also in the bag is a long spare ball. The ball threads fit the end of the hex standoff. I put a shot of green loctite on the ball threads, then threaded it into the standoff, then made a couple of small slots in the ball using a small file.

I insert the other end of the standoff into my pin vise, it allows me to get a good grip on the ball while I'm using it to resize the links.

-----
Dave

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

Team Heliproz

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04-01-2009 11:52 PM  9 years agoPost 6
calme9

rrNovice

Ontario

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250 Ball Link Resizing
I echo Dkshema's comments about using the spare ball that comes with the kit. See below youtube link for video on how to create your on tool. I follow the directions in the video last night and it works very well. I found placing the aluminum shaft in the drill very easy to use.

http://www.youtube.com/watch?v=sTeZ6mhQGLM

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04-02-2009 01:21 AM  9 years agoPost 7
MMike

rrElite Veteran

Holland,Mi-USA

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I have not resized the linkage on my other Align helis.

Is the 250 more likely to require resizing??

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04-02-2009 01:28 AM  9 years agoPost 8
caseyjholmes

rrElite Veteran

Portland, Oregon

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Yes, but not much at all. They aren't super tight, but tight enough to where it will make a difference in flight characteristics if you don't.

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04-02-2009 04:49 AM  9 years agoPost 9
TMoore

rrMaster

Cookeville, TN

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The ball link sizer from Heli Direct is over size and will kill the ball links. You're better off to make one from a left over ball. In a few days Align is supposed to be shipping new balls that actually fit the links so hold your breath and see what happens.

TM

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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04-02-2009 02:40 PM  9 years agoPost 10
CrashMaker

rrNovice

Falls Church, Va - USA

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I have purchased 3 different ball joint sizers from Helidirect.

Here's my personal opinion of them.

The first is too small, and isn't effective enough.

http://www.helidirect.com/ball-link...-250-p-8716.hdx

The second is slightly too large. I assume it is the one mentioned above. I have been successful using it as a stretcher rather than a sizer that cuts the joint to size. I just placed the link on the tool and took it right back off. It stretches the link so that the connection is loose, but it still snaps onto the ball enough that I am comfortable using them. Do not use on a cold link, or it will snap the link rather than stretch them like was mentioned above.
http://www.helidirect.com/ball-link...ppro-p-4660.hdx

The final I just received yesterday, and have only tested one link with. The result was a slightly tighter link than above. The link (I used a "B-link") was tight enough that it wouldn't drop to vertical without assistance, but was much better than stock. Using the second sizer, the link was loose enough to drop to vertical without assistance. This sizer just appears to be a ball with a slot cut in it stuck into a chuck similar to what others have mentioned.
http://www.helidirect.com/ball-link...250-p-10992.hdx

Ken

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09-05-2011 04:25 PM  7 years agoPost 11
Justin Stuart (RIP)

rrMaster

Plano, Texas

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This thread is worth bumping. The extra ball on the end of a main shaft works great.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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