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01-23-2012 07:41 PM  6 years agoPost 1
skypup

rrVeteran

San Antonio, Texas

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I decided to go with stainless screws and ordered a set for my Radikal. Has anyone used these?

SKYPUP

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01-23-2012 10:23 PM  6 years agoPost 2
ttaylor63

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Floresville,Tx

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I just used the stock screws. Had a couple heads that stripped but just dremeled a slot in them & replaced with new ones. I'am sure the RCScrewz are better quality thou..

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01-23-2012 11:06 PM  6 years agoPost 3
Dood

rrProfessor

Wescanson

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Don't be mistaken. those stainless steel screws are NOT of a higher quality. They're in fact softer and the heads may strip.
If you're looking for the same shiny bling effect, you need to seek zinc plated hardware.

Taylor,
If you have a problem stripping the heads on standard hardware, then I'm willing to bet you're using cheap tools.

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01-23-2012 11:35 PM  6 years agoPost 4
skypup

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San Antonio, Texas

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Thanks, they have a 100% satisfaction return policy. I'll need to check that out.

SKYPUP

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01-23-2012 11:42 PM  6 years agoPost 5
ttaylor63

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Floresville,Tx

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Using the dynamite hex tools, they aren't cheap by any means. I've maybe only stripped 2-3 button heads out of 4 heli's

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01-23-2012 11:53 PM  6 years agoPost 6
Dood

rrProfessor

Wescanson

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Using the dynamite hex tools, they aren't cheap by any means.
Just as I suspected. Cheap tools. Dynamite tools are junk, and WILL strip a lot of screws. I know first hand.
3 screws on 4 helicopters is too many.

Try these: http://www.heliproz.com/prodinfo.asp?number=803879 They're inexpensive and of impeccable quality.

I've been using them for over 5 years on over a dozen helicopters and have yet to strip a single screw.

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01-23-2012 11:59 PM  6 years agoPost 7
skypup

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San Antonio, Texas

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Those are the ones I've used for years also. I wrote to the screwz people and they responded right away. This is what they said.

"We also have 1000's of satisfied customers who would say the opposite .... everyone has their own opinion. Our screws are rated at A2/A4 which is highest stainless rating...dubro uses A0 the lowest.

As long as quality tools are used... stripping should never be in issue. We have been selling stainless screwkits for 15 years if they were bad we wouldn't still be in business. Please take the time and do the research on the internet yourself on stainless quality ratings".

SKYPUP

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01-24-2012 12:08 AM  6 years agoPost 8
eppler

rrApprentice

Baytown, TX

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I would not use stainless steel screws the m3 size has almost half the tensile strength of standard alloy screws and do not have the elasticity. In short they are weaker than the ones that came with your heli how ever I would replace them with cap head screws from Mcmaster.com

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01-24-2012 02:47 AM  6 years agoPost 9
RM3

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Killeen, Texas - USA

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+1 on what Eppler said.
Small Stainless screws have a very bad fatigue problem, and on a gasser (where high freq vibs along with tensile stress) your asking for trouble. I was a machinist for 6 years and do alot of machining as a hobby now, I can tell you that the only reason for using stainless is for the oxidation resistance it has. Plus if ou are used to magnetically holding them as some tools are magnetized, good luck with the stainless, its non magnetic. As for strength, it is lacking compared to the black oxide finish Hex bolts as Eppler stated in his post that are available from Mcmaster-Carr. Most guys will have issues with the small button heads stripping out. this is due to the very shallow nature of the hex inside the button head along with the isssue of using ball end allen wrenches. If you want to keep button head screws its best to stick with non-ball end wrenches, switching to the Cap heads will have more metal depth to "hug" the ball end. our ball ends wrenches also tend to wear around the outside edges of the "ball" end flats and this will cause them to begin rounding out the hex inside the bolt and further add to the rounding of the flats on the allen wrench ball end.

So use good hardended quality allen wrenches of the proper size and use good quality bolts of the proper steel especially on gassers.

showing a preference will only get you into trouble, 90% of everything is crap...

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01-24-2012 03:24 AM  6 years agoPost 10
skypup

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San Antonio, Texas

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Thanks RM3 and all

I do some amateur machining myself.

http://vimeo.com/5209059

I should have researched a little more. I don't want to take chances with the gaser, too much invested. I use Helipro metric socket screw drivers and was able to locate new 90 degree metric hex keys for my build. Not sure if I should use the stock screws or buy socket heads?

SKYPUP

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01-24-2012 04:02 PM  6 years agoPost 11
skypup

rrVeteran

San Antonio, Texas

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Screw hardness
RcScrewz offered a refund. They do stand behind their product:

"our choice and ur loss. Refund will be issued.

Its funny how novice users advice is given and followed...and how our 13 sponsored century Heli pilots who use our products are ignored.....

Thanks & God Bless
Keith Bergevin - Owner"

Keith

After several people who own Radikal gassers advising me NOT to use the stainless screws on my gasser (vibration levels) I am thinking about following their advice. If I pay return shipping would I be able to be issued a refund? Thanks for your help.

I came across this:

Materials

Stainless Steel
Stainless steel is an alloy of low carbon steel and chromium for enhanced corrosion characteristics. Stainless steel is highly corrosion resistant for the price and because the anti-corrosive properties are inherent to the metal, it will not lose this resistance if scratched during installation or use.

It is a common misconception that stainless steel is stronger than regular steel. In fact, due to the low carbon content, stainless steel cannot be hardened. Therefore when compared with regular steel it is slightly stronger than an un-hardened (grade 2) steel fastener but significantly weaker than hardened steel fasteners.

Stainless steel is also much less magnetic than regular steel fasteners though some grades will be slightly magnetic.

18-8 Stainless
18-8 refers to any stainless steel containing approximately 18% chromium and 8% nickel. This is the most common stainless designation for hardware. For information on 18-8 stainless steel material properties see our Material Grade Identification and Properties Chart.

Steel
Steel is the most common fastener material. Steel fasteners are available plain as well as with various surface treatments such as zinc plating, galvanization, and chrome plating.

Steel fasteners are commonly available in 4 grades. Many other grades exist but are used far less often. The most common grades are Grade 2, Grade 5, Grade 8, and Alloy Steel. Grade 2, 5, and 8 are usually plated with a silver or yellow zinc coating or galvanized to resist corrosion.

Determining Bolt Grade
Bolts of different grades are marked on the head to show what grade bolt they are. For a list of the most common grade markings see our Material Grade Identification and Properties Chart.

Grade 2
Grade 2 is a standard hardware grade steel. This is the most common grade of steel fastener and is the least expensive. Grade 2 bolts have no head marking (sometimes a manufacturer mark is present).

Grade 5
Grade 5 bolts are hardened to increase strength and are the most common bolts found in automotive applications. Grade 5 bolts have 3 evenly spaced radial lines on the head.

Grade 8
Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head.

SKYPUP

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01-24-2012 06:26 PM  6 years agoPost 12
RM3

rrElite Veteran

Killeen, Texas - USA

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your welcome Skypup,
Its the small print that gets us all, and its the sales man that somtimes steer us away from the "true" facts...

logic based on that statement is clear, there are a hell of a lot more "novice" pilots with way more experience, with mechanical backgrounds and engineering knowledge than thier 13 "sponsored" pilots,

So just because "hotshot 3D skaterboy" flies it, I should too?, I'll fly it when they buy it...

showing a preference will only get you into trouble, 90% of everything is crap...

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02-26-2012 05:35 AM  6 years agoPost 13
dirtypool

rrNovice

Clovis, CA USA

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"I'll fly it when they buy it"
Agreed. What do they care, they don't pay for their stuff anyway and probably get new gear long before there is a problem.

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02-27-2012 07:24 PM  6 years agoPost 14
Gearhead

rrMaster

Vt

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well, after reading that 13 pilot thing I Emailed 3 Century Reps and they have no idea what this Keith Bergevin guy is talking about, no Century Rep is using his SS Screws on their Gassers

Jim
Buzz Buzz Buzz

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