Best alternate bolts for tail blade grips - HeliFreak
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Old 03-28-2012, 09:33 AM   #1 (permalink)
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Default Best alternate bolts for tail blade grips

It's a known fact that the tail blade bolts are too short - they don't engage the nylon part of the locknut...

I got myself three different types of bolts, and these are a perfect fit both lengthwise and diameter-wise:

http://www.modelhelicopters.co.uk/m3...shouldere.html

They even have a shoulder which seems to be made to measure for the TDR grips and spacers, and the Radix blades.

Much better that having the bolt threads making contact with the blades I'd think...
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Old 03-28-2012, 10:24 AM   #2 (permalink)
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Interesting...I have three kits and none of them have tail bolts that are too short. So how many kits have this problem?
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Old 03-28-2012, 10:32 AM   #3 (permalink)
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Well, you're the first I read about who has correctly sized bolts...
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Old 03-28-2012, 11:38 AM   #4 (permalink)
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Same problem here. I replaced them with bolts I found in my R50 parts box.

https://www.helifreak.com/album.php?...ictureid=69725

They're fully threaded, btw...
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Old 03-28-2012, 12:35 PM   #5 (permalink)
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My bolts are short too...
But I used a cutting disk on the dremmel and made the bolt thinner till the screw sits further into the thread...all good to go !
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Old 03-28-2012, 02:34 PM   #6 (permalink)
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Default MIne are fine too

well over 100 flights
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Old 03-28-2012, 04:30 PM   #7 (permalink)
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Got my kit nov 2011 and mine are too short. I just used some threadlock.
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Old 03-28-2012, 06:53 PM   #8 (permalink)
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I got mine in February and I reversed the nuts and screwed straight into the nylock.
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Old 03-28-2012, 11:17 PM   #9 (permalink)
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My first kit arrived with the short bolts, second one is fine. You will need galvanized 3mm hexagon 12.9 shank bolts and the correct length is 20mm. my first kit (2009) had bolts of 18mm supplied. If you can't get them galvanized a normal 12.9 steel bolt will do, they just tend to rust a bit.
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Old 03-29-2012, 12:40 AM   #10 (permalink)
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Quote:
Originally Posted by mkovalcson View Post
I got mine in February and I reversed the nuts and screwed straight into the nylock.
that's no good if it doesn't have enough thread, replace them if too short.
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Old 03-29-2012, 07:47 AM   #11 (permalink)
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Mine have been very tight, almost too short.
I took longer ones and cut them to fit
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Last edited by ZuvieleTeile; 03-29-2012 at 09:40 AM..
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Old 03-29-2012, 09:21 AM   #12 (permalink)
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Quote:
Originally Posted by Vinger View Post
My first kit arrived with the short bolts, second one is fine. You will need galvanized 3mm hexagon 12.9 shank bolts and the correct length is 20mm. my first kit (2009) had bolts of 18mm supplied. If you can't get them galvanized a normal 12.9 steel bolt will do, they just tend to rust a bit.
How's this? $11 for 100 bolts I'll need to order another 48 TDR's

http://www.amazon.com/dp/B00598DL7W/ref=biss_dp_t_asn


Or $40 for 10 bolts in SS. Seems a bit pricey to me.

http://www.amazon.com/dp/B00137HPRK/ref=biss_dp_t_asn


I think these are the winners!

Metric Zinc Plated Alloy Steel Socket Head Cap Screw, Hex Socket Drive, M3-0.50, 20 mm Length (Pack of 100)
http://www.amazon.com/dp/B005A0OIGC/ref=biss_dp_t_asn
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Old 03-29-2012, 09:32 AM   #13 (permalink)
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Mark, none of those have shoulders...

If you want the best for your TDR, then you have to go with the ones I mentioned...
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Old 03-30-2012, 02:22 AM   #14 (permalink)
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I bought these ones, will mount them just about now:
http://www.fast-lad.co.uk/store/av00...w-p-12153.html
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Old 03-30-2012, 02:57 AM   #15 (permalink)
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Quote:
Originally Posted by Danny_Swe View Post
I bought these ones, will mount them just about now:
http://www.fast-lad.co.uk/store/av00...w-p-12153.html
I have those also... Not as good as the ones I eventually used and mentioned in my first post... I didn't use them.
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Old 03-30-2012, 06:51 AM   #16 (permalink)
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Here's a 18.8 stainless set of 20 for $5.56 partially threaded.
http://www.mcmaster.com/#92855A319
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Old 03-30-2012, 07:00 AM   #17 (permalink)
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Quote:
Originally Posted by Chris_M View Post
Here's a 18.8 stainless set of 20 for $5.56 partially threaded.
http://www.mcmaster.com/#92855A319

Very nice!

Now add this one for a higher quality Jesus Bolt and the order is complete
http://www.mcmaster.com/#91290A164


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Old 03-30-2012, 08:34 AM   #18 (permalink)
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I take some of those Mark. . .
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Old 03-30-2012, 08:42 AM   #19 (permalink)
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Quote:
Originally Posted by ZuvieleTeile View Post
I take some of those Mark. . .
You are welcome to some.

To bad there wasn't a communal area like a penny jar to put stuff like this that comes in bulk and you recieve a quanity of parts that you will never use!
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Old 03-30-2012, 08:51 AM   #20 (permalink)
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Quote:
Originally Posted by mkovalcson View Post
Very nice!

Now add this one for a higher quality Jesus Bolt and the order is complete
http://www.mcmaster.com/#91290A164



In this example, I belive the 18-8 stands for the quality/ "blend" of stainless steel. Not tensile strength...
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