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HelicopterMain Discussion › Linkage Rod Measuring Tool
08-06-2009 12:57 AM  7 years agoPost 1
RyeGuy83

Senior Heliman

Crest Hill, IL - United States

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Hey everyone. I've been searching online for a good tool to measure my linkage rods... hopefully one that will do multiple rods at the same time. I haven't been able to find any online yet, and was wondering if anyone had any ideas where to find a good one.

I'm also looking for a ball link pliers for a 400/450 size machine if anyone is selling one. Please let me know.

AMA Member #914650
E-Flite Blade mCP x
Gaui Hurricane 425
HK600 GT FBL

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08-06-2009 01:03 AM  7 years agoPost 2
Yug

rrMaster

UK. Herts

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Get a set of digital callipers and drill/tap a holes on each of the 2 stickyoutey measuring bits to fix balls.

Vegetable rights and Peace

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08-06-2009 01:03 AM  7 years agoPost 3
Heli 770

rrProfessor

USA.

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Century RC, # CN2255.

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08-06-2009 01:05 AM  7 years agoPost 4
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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good luck drilling and tapping the hardened stainless steel.

if you happen to have a milling machine just laying around, you can always make your own set...like me!

Shawn
Team Leisure-Tech
Team HelixRC

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08-06-2009 03:54 AM  7 years agoPost 5
EASYKILL

Senior Heliman

Sonora,Ca - US

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http://www.ronlund.com/Merchant2/me...ode=Setup_Tools

Hello, my name is Tony and I'm a heli addict...

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08-06-2009 04:04 AM  7 years agoPost 6
Wyorcflyer

Veteran

Cheyenne, Wyoming USA

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Easykill:

I have the one you supplied the link to and can't recommend it. It is not even close, off at least 1/2mm on one side and 1mm on the other. Since the two aren't matched you can't use both. I end up measuring with a caliper to set one side and then just use the one I set. Plus the bracket that moves fits so loose that getting any acuracy is not easy. Maybe I just got a bad one but that is my experience.

I have seen ball adapters advertised that use thumb screws to mount on your calipers to turn your calipers into a ball link tool. You can put any size ball on it you want. That looks like as good as any to me. Sorry, I can't remmeber where I saw them, maybe someone else can chime in.

jack

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08-06-2009 04:39 AM  7 years agoPost 7
BigHarv

Heliman

West Linn, OR - USA

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+1 for what Wyorcflyer says. I bought a set, tried to use them a couple of times and now they sit in a box of unused parts. I think I can get closer eyeballing with a standard digital caliper. However, if there's another, better tool, I'm certainly interested.


BigHarv
TRex 450, Raptor 50 V2, Rap 50 Titan, Rap E550, Rap 90SE, Trex 600NPro, Trex 550E

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08-06-2009 06:57 AM  7 years agoPost 8
chopper63

Senior Heliman

West Coast Chopper

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Try this tool by FMP - FMP1094 Ultimate Pushrod Measuring Tool

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08-06-2009 09:38 AM  7 years agoPost 9
ch-47c

Elite Veteran

san jose, ca

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I have a Revolution rod measuring tool and it is accurate. It is limited in length and ball-link size, so I have a set of digital calipers as well.

For the money and versatility, I would get a digital caliper first. Harbor Tools sell them for about $29. I used to be a helicopter mechanic and collect tools, so I buy any tool anyway.

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08-06-2009 10:45 AM  7 years agoPost 10
z11355

rrMaster

New England

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a set of digital calipers (ALWAYS handy to have) and these:

http://www.ronlund.com/Merchant2/me...t_Code=VAR11_86

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08-06-2009 11:32 AM  7 years agoPost 11
Taipan

Elite Veteran

Sydney, Australia

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Just a digital caliper alone is all you need. Here's an easy way to measure a link, hole centre to centre;

1) Put the caliper inside a rod end as if you were gonna measure the inside diameter and REZERO it.

2) Then measure the length from inside the one rod end to the inside of the other. There you go! Distance from hole centre to centre. (By rezeroing the rod diameter, you're left with the distance alone.)

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08-06-2009 03:12 PM  7 years agoPost 12
chopper_crazy

Elite Veteran

Delphos, Ohio

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I bought the blue one from Rons a few months back and really like it. I think it was about $30 but well worth it.

It's a complex, costly, glow powered anti-gravity machine!

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08-06-2009 04:18 PM  7 years agoPost 13
Frank Bostwick

Elite Veteran

Cincinnati Ohio

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I use and have used for many years, caliper center finding points. Very Very easy. They just screw on to the inside jaws and have pointed tips. Most of the time its way more important for a pair of links to be exactly the same length, as opposed to some exact measurement from the manual.

RIP ROMAN

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08-06-2009 04:47 PM  7 years agoPost 14
red_z06

rrProfessor

Dumont, NJ

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If you have a mechanical (manual including dial) caliper, the attachment is needed. But, with advent of cheap digital (non mitutoyo) calipers with zero set, you really do not need the attachement.

Follow Taipan's instructions.

Calipers have long jaw (measuring outside dim) and show jaw (inside measuring).

When you measure using the short jaw between the holes, you will be measuring the link length + one hole diameter. So, to offset, you stick the short jaw inside one hole and spread (max size) and press zero.
Stick the short jaw inside the two link hole and spread the caliper until the short jaw reach the max size and read the size directly.

www.JustinJee.com

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08-06-2009 06:44 PM  7 years agoPost 15
MartyH

rrProfessor

USA

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That aluminum Century tool gets my vote. I'm using something similar but it's plastic and is warping. There is also a set of tips you can clamp on a 6" caliper to do one at a time to a particular measurement. I like doing pairs myself.

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08-06-2009 08:13 PM  7 years agoPost 16
BarracudaHockey

rrMaster

Jacksonville FL

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Z nailed it. Calipers and the Vario pushrod nubs.

Andy
AMA 77227
http://www.jaxrc.com

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08-06-2009 09:41 PM  7 years agoPost 17
RyeGuy83

Senior Heliman

Crest Hill, IL - United States

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Thanks guys. Found a digital caliper for less than $10 on ebay. has both short and long tips. I'll try it out when it get's here and see how well it works.

AMA Member #914650
E-Flite Blade mCP x
Gaui Hurricane 425
HK600 GT FBL

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08-06-2009 10:57 PM  7 years agoPost 18
Jeff polisena

Elite Veteran

westpalmbeachflorida usa

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http://www.heliproz.com/prodinfo.asp?number=123280 I use this . Be careful sometimes it is worth spending more money on a good (metal)caliper. I got a cheap one and it sucks you can have it pay shipping .

I stole it ,flew it and gave it back ;)

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08-06-2009 11:02 PM  7 years agoPost 19
702nitro

Key Veteran

Las Vegas, NV

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Two tools you'll need
1)Digital Caliper
2)Adjustable sliding ruler with ball links(available online at hobby stores)

The adjustable Sliding ruler makes setting up links easier and helps you reach target length faster. Then for accuracy make adjustments using the digital caliper.

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08-09-2009 02:37 AM  7 years agoPost 20
ren

Veteran

Houston, TX

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Nothern tolls sell them for a good price!

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