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HelicopterAlignT-REX 700N › Aftermarket screws for the T700?
12-25-2008 05:48 PM  8 years agoPost 1
MrMel

rrProfessor

Gotland

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I'm _really_ tired of the quality of the "Socket Button Head Collar Screw" on the T700, even without loctite I strip them when trying to remove motor bolts etc (with HQ tools), they are just too soft.

(Dremel a cut in them and use a flat screwdriver works everytime so far thank god.)

Is there any third-party manufacturer that has made higher quality bolts?

Or someone that made inserts so you can use std 3mm bolts?

- Fredrik

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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12-25-2008 06:09 PM  8 years agoPost 2
Qrrambero

rrKey Veteran

San Francisco / Bay​Area

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I had the same problem and I order this kit.
I hope this help and you can order it from Sweden.
http://www.rcscrewz.com/product_inf...roducts_id/3017

Ae

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12-25-2008 06:13 PM  8 years agoPost 3
MrMel

rrProfessor

Gotland

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Thanks!!! You made my day, exactly what I was looking for.

And yep, was ok to ship to sweden, a bit pricy shipping, but for the troubless future, I dont care

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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12-25-2008 06:17 PM  8 years agoPost 4
george0079

rrElite Veteran

USA

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Does not include any machined collared screws
And these would be the ones that are the biggest problem....

I, too, have the same problem with them. Every time I have to remove one, I need to cut a slot in it, and remove it with a screw driver. once it's out, I have to trow it away, and put a new one in.

I think brass bushings, and standard M3 socket heads would be great.

So, where do we find brass bushings that are 3mm ID X 4MM OD, and 1.5mm long

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

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12-25-2008 06:28 PM  8 years agoPost 5
MrMel

rrProfessor

Gotland

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Argghh, i missed that comment.
Back to looking for a solution.

Yeah a simple collar could work

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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12-25-2008 11:56 PM  8 years agoPost 6
Cameron

rrKey Veteran

St. Johns, Florida

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I e-mailed rcscrewz a few months ago about this as I was having the same problems. I bought the 600n replacement screws which are the same size, but the screw hole is actually deeper and I have not stripped any of these out yet.

Cameron

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12-26-2008 07:18 AM  8 years agoPost 7
Liron alm.

rrApprentice

Israel

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if we would use a standard 3mm screws, what bushing size should we get to go in the hole?
i can ask a friend who has a CNC workshop to make us some kits.

i agree, these screws are the worst!

fly hard, land harder

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12-26-2008 07:22 AM  8 years agoPost 8
duke666

rrKey Veteran

Hampshire, UK

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I think brass bushings, and standard M3 socket heads would be great.

So, where do we find brass bushings that are 3mm ID X 4MM OD, and 1.5mm long

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12-26-2008 10:27 AM  8 years agoPost 9
duke666

rrKey Veteran

Hampshire, UK

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Might be worth an email to RCSCREWZ or FastLad as on the FastLad website it says they include all screws. Perhaps the kit has been updated.

http://www.fast-lad.co.uk/store/scr...olt-p-5547.html

Duke

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12-26-2008 05:49 PM  8 years agoPost 10
MrMel

rrProfessor

Gotland

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What about countersink screws?

They are cone-shaped, so it will kind of center in the hole.

Drawback is that they are one size smaller on the hex hole, but good quality from RTL which I happens to have at home might have less strip tendency then stock screws anyway.

Also there isnt alot of CF which it grips over since the head isnt that big.

Yea or Nay?

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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12-26-2008 05:52 PM  8 years agoPost 11
george0079

rrElite Veteran

USA

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Nay. Using counter-sink screws is a good way to crack the CF

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

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12-26-2008 06:36 PM  8 years agoPost 12
PilotDaz

rrKey Veteran

Seattle, WA

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I had the same problem with my N700 screws. I had to drill about 14 of them and use this tool to get them out (the dremel trick didn't work for me):

I concluded that there are 3 problems with the N700 Socket button collar screws.

1) Too soft, strips easily.

2) Socket hole is too shallow and doesn't allow enough tool penetration.

3) The collar is off-centered on many of them. You can see this when you turn the screw, it appears to wobble. This causes the collar to fit too tightly in the carbon hole, which is why they still get stuck even without locktite.

The solution I found was to use the screws from the N600. They're the same dimensions but lacking all 3 problems (strangely enough). Never had a single problem with any of those.

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"

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12-26-2008 07:01 PM  8 years agoPost 13
MrMel

rrProfessor

Gotland

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Hmm i use only n600 screws and they strip too

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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12-26-2008 07:05 PM  8 years agoPost 14
PilotDaz

rrKey Veteran

Seattle, WA

My Posts: All  Forum  Topic

In that case then, my guess is that there are good batches and bad batches of these screws. You can tell the difference between a good one and a bad one when you are turning them in.

If you see the collar wobble while you are turning it in, it's a bad one. Discard it.

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"

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12-26-2008 07:30 PM  8 years agoPost 15
TooLy

rrVeteran

Israel

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That is weird, my screws kinda locked inside, and it's very hard to release them, need lot of force to do that.

~Roei~

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12-26-2008 07:32 PM  8 years agoPost 16
MrMel

rrProfessor

Gotland

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No issue with them not locking or not being straight, just the hex hole stripping

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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12-26-2008 09:45 PM  8 years agoPost 17
JAGNZ

rrProfessor

Auckland, New​Zealand

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I have had 0 issues with my screws, on the 600N's OR 700N. What are you guys doing to your screws???? Yes, they could be of better quality (and some DO wobble due to non-concentricity) but if you are careful with them I don't see how they can strip?

That is if you use quality drivers of course...


Jason Greenwood

www.3dheli.co.nz

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12-26-2008 10:52 PM  8 years agoPost 18
Cameron

rrKey Veteran

St. Johns, Florida

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I use the MIP Thorp drivers and still have problems with the screws.

Cameron

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12-26-2008 11:06 PM  8 years agoPost 19
baby_zyklon

rrElite Veteran

Singapore

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Since I started using quality hex drivers, I have never stripped any screws...until I started flying the 700N. Those socket collar screws on the main frame strip after you take them out 2-3times, that is, without any loctite. The worst part is not that they strip, but there is no better quality replacement that you can get because of the odd shoulder size.

The 600N main shaft bearing block screws that align sells in pack of 12 are slight better because they have more depth of bite for the driver. However, do note that I have come across bolts of different thickness of bite in the same pack, i.e. 2-3 like those on the 700N, which points to consistency. You will need approximately 5-6packs of those 12pieces a pack collar screws to get enough good ones to change everything on the main frame.

To date, I am still searching for something with a similar collar, but with a cap head.

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12-26-2008 11:08 PM  8 years agoPost 20
PilotDaz

rrKey Veteran

Seattle, WA

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What are you guys doing to your screws???? Yes, they could be of better quality (and some DO wobble due to non-concentricity) but if you are careful with them I don't see how they can strip?
Trust me, some of these screws are so soft that they strip if you look at them sideways, and it is flat out impossible to remove them without rounding out the socket due to their off-centered shoulder.

Yet in the same bag of screws others are just fine and I can put a ton of force on them without them stripping out. I'm absolutely convinced that it is an issue of screw quality.

I think however that there are just a handful of these bad screws out there judging by how infrequently I hear about the issue.

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"

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