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HelicopterMain Discussion › looking for a little die to thread linkage rods.
11-29-2007 08:09 PM  10 years agoPost 1
Cope

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South Lake Tahoe CA

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Dose any one know the size of the threads/ pitch on linkage rods?
I got some rod and bought a 4-40 die (the smallest in town) It is one size to big, what size do you guys use? I would like to order it from MC master carr. any ideas?

It's just one of those days, for weeks now
Thanks
Cope

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11-29-2007 08:21 PM  10 years agoPost 2
mbfjr

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Lawrenceville, Georgia

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McMaster Carr doesnt carry 2mm stuff...they just go down to 3mm
Try this one:
http://www3.towerhobbies.com/cgi-bi...p?&I=LXR775&P=7

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11-29-2007 08:25 PM  10 years agoPost 3
Cope

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South Lake Tahoe CA

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Cool is that the size I need? Thanks for the link.
Cope

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11-29-2007 09:00 PM  10 years agoPost 4
copperclad

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NY

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hi cope
some info i have picked up over time , i hope you will find some of this usefull , a lot of link rods you find on helis have rolled in threads , these are not die cut and the main difference is the rod starts out a slightly smaller diameter , when they roll in a thread , because the metal is being pushed into position , the thread is actually a larger diameter than the rod they started with , one problem you can run into because of this , is if you shorten a rod that has rolled threads and try to die cut new threads , they will not be fully formed

you will also have trouble if you try to thread music wire as it is much to hard and will ruin the die

what i have had better luck with is look into rod sets for different helis and see if you can find something premade that will work , and the other thing i have had work is to buy 4-40 or 2-56 all thread , dubro makes it , and use a tap to thread the links

the hot setup , but it is spendy , is to get a thread roller through a bike shop , bicycle spokes have rolled threads too , and use it , you may ask at the local club and see if a clubmember has one also

hope this is some help , dana

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11-29-2007 09:03 PM  10 years agoPost 5
rstacy

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Rochester, NY

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Cope,
Use this

It will fit different size rods.
It rolls the threads.
Your plastic links will fit better.

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11-29-2007 09:07 PM  10 years agoPost 6
copperclad

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NY

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hi Ray
do you have a link for that roller , thanks , dana

i found it thanks
http://www.biketoolsetc.com/index.c...item_id=HZ-C700

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11-29-2007 09:19 PM  10 years agoPost 7
Cope

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South Lake Tahoe CA

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Wow that spoke roller looks like the lick! I bookmarked the page thanks.
The cut threads are not as strong? Is that why the rolled threads?
I can buy the rod's prethreaded, I just want to make my own.
because of cost. Read that as I'm broke
Thanks for all the great info
Cope

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11-29-2007 09:25 PM  10 years agoPost 8
B.Waitkus

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MassWeed

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wow, this is an awesome idea, cool sorry for the pointless post, I just admire your motivation towards enginneer, very very cool device

Just Fly It

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11-29-2007 09:44 PM  10 years agoPost 9
rstacy

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Rochester, NY

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http://www.hozan.co.jp/cycle_e/cata...stand/C-700.htm

It is a bicycle spoke threader.
You can find it for about $90.00
Yes it is worth it.

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11-29-2007 09:47 PM  10 years agoPost 10
Hughes500Pilot

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Anaheim, CA

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As pointed out, rolled threads are better then cut threads. The K&S 2mm die works. But, it wears out very quickly and is easy to break since it is a split design. Also, being a split design, the adjustment screw can be a pain in the butt to use.

If you must make rods using a die, I suggest the Vario 2mm die. It is much better quality.

Depending on the number of rods you need, it may be easier and cheaper to just buy some that are pre-made. Both Hirobo and JR sell pre-made rods. Both sell rods that are rolled, not cut. Hirobo sells 2mm rods and JR sells 2.3mm rods.

Take a look at HeliProz and HeliProz South's web sites and you will see them. For JR rods, search near parnt number JRP980046. Thats the number for 60mm rods. For Hirobo rods, search near part number 2522-009. Thats the number for 70mm rods.

Lastly, if you belong to a heli club, suggest to the membership that a the club buy a thread rolling machine. This way, it can be brought to the field and to meetings for all to use. Just bring your own rods.
-Steve

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11-29-2007 09:48 PM  10 years agoPost 11
rstacy

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Rochester, NY

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The cut threads are not as strong? Is that why the rolled threads?
Not exactly. Cut threads take material away. The result is a smaller diameter.
I can buy the rod's prethreaded, I just want to make my own.
because of cost. Read that as I'm broke
Thats gonna be a problem

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11-29-2007 09:53 PM  10 years agoPost 12
Cope

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South Lake Tahoe CA

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LOL tell me about it

so... Final answer is?
Cut threads ok?
Thanks again
Cope

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11-29-2007 09:59 PM  10 years agoPost 13
airdodger

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Johnston USA

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11-29-2007 10:03 PM  10 years agoPost 14
Cope

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South Lake Tahoe CA

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Thanks for the info.
Any one got a link to the Vario die? or the sos die?
I googled it but just got pictures? not a site selling them?
Any links?
Thanks
Cope

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11-29-2007 10:09 PM  10 years agoPost 15
airdodger

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Johnston USA

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Try Ron's was Ricks before, they had them listed and also the unthreaded rods.

http://www.ronlund.com/Merchant2/merchant.mv? Just type in 2mm die

Chris

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11-29-2007 10:17 PM  10 years agoPost 16
Cope

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South Lake Tahoe CA

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Ok new brain storm!
looking at what I got, the rod fits perfectly in the 4-40 die, and the rod is the size I want (2mm) , So...... what about just getting the next size up rod, and "cutting" it with the 4-40 die?
this should give me a 2mm thread right, and remove some of the fit issues of a cut thread? because the thread will be just over 2mm.(2mm +the depth of the thread)
Yeay or nay?
Cope

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11-29-2007 10:21 PM  10 years agoPost 17
airdodger

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Johnston USA

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Buy the rods if possible they are case hardened and rolled threads. Strong and light. Try bending the 4/40 then the 2mm rod from a heli and make your own decision. Refer to rstacy thread about cut vs rolled.

Chris

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11-29-2007 10:23 PM  10 years agoPost 18
steve9534

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yakima, wa.

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Cope

Cheaspest possible way to make linkage rods is to buy some 4-40 all thread at the local hardware and drill out your links so they will screw on. Makes for a stronger rod and the links will fit just fine if you drill out the hole - I believe the correct sice is 3/32" if my memory is correct. Hope this helps. steve.

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11-29-2007 10:24 PM  10 years agoPost 19
airdodger

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Johnston USA

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4/40 all thread is not a stronger rod!

Chris

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11-29-2007 10:28 PM  10 years agoPost 20
Cope

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South Lake Tahoe CA

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I have decided to go with the larger rod, These linkages are for my shuttle. I have two rotor heads and would like to make up links for both.
All I do is hover and easy ff. The rod I have feels plenty strong.
I cant seem to find all the correct end links for the shuttle, some are a strange bent connection. I was thinking I could experiment and try to bend the rods and use standard links. This way I would at least know what size rod to buy in the future.
Thanks
Cope

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HelicopterMain Discussion › looking for a little die to thread linkage rods.
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