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Old 11-16-2002, 12:59 PM   #1
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Default HPI Pro 3 / XXX-S Screw Kits?

Does anyone know how many and which screws of each will replace the stock setup? I want to replace all my screws to hex. I'm buying the screws in bulk so I don't know how many of each i need.


If any of you know how many screws in each kit it would save me a lot of time.
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Old 11-16-2002, 01:02 PM   #2
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A lot of places just sell the complete screw kit and I think that's what most of us have done. You'll just have to get out the manual and start counting!
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Old 11-16-2002, 02:50 PM   #3
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Note that the XXX-S already has hex screws, though the Pro 3 does not.
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Old 11-16-2002, 03:00 PM   #4
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Rc-Zombies tell you just what you need for the pro 3 in the pro3 forum check it out
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Old 11-16-2002, 08:30 PM   #5
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Yeah... That's what i was afraid of.. I didn't want to bust out the manual and count but i guess that's what i might have to do.

I knew someone would mention the xxx-s already had hex screws. The only thing is I don't like the screws that come w/ the losi. I'd rather replace them, they are starting to rust on me.

How much do aluminum hex screw kits normally cost?
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Old 11-17-2002, 10:08 AM   #6
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Default Aluminum screws

I would stay away from the Aluminum screws. They are much weaker than the normal steel screws in a kit.
Aluminum will break, even in low stress areas in a crash.
Buy Titainium screws instead. Lighter and stronger then steel.
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Old 11-17-2002, 10:47 AM   #7
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I am pretty sure that there is someone on e-bay who is selling a titanium screw kit for the xxx-s. it was like 19 the last time i checked. I could be wrong tho, memory is one thing i am not good at keeping.
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Old 11-17-2002, 03:02 PM   #8
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So 7075 T6 Aluminum Screws aren't strong?

Aren't most modified chasis made of the same material?

Also, I want to save weight. I figured I could save weight and still retain most of the strength of the stock screws. I need more opinions

Thanks for the input! I'll look for those titanium screws on ebay.
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Old 11-17-2002, 03:46 PM   #9
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TiR has a really nice titanium screw kit for the xxxs. They've also got a titanium ballstud kit for the xxxs. I'm not sure what their website is, I think the screw kit costs around $70 or so.
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Old 11-17-2002, 03:58 PM   #10
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Titanium is cool and all but the price is a little on the high side.

Which was why i was wondering about Aluminum screws.. Do you guys really not recommend T6 Almunium screws because they break easily? Or do they break if you crash hard?

Thanks for the input... Very helpful stuff..
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Old 11-17-2002, 07:30 PM   #11
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I know KTHobbies.com has the xxx-s screw kits.

They are nice, I've seen them before, but i still run the stock screws.

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Old 11-17-2002, 08:27 PM   #12
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Default screw strength

Steel screws of the same size are stronger than titanium screws. Stainless screws are a good substitue for steel and provide corrosion resistance. Aluminum screws in a high stress area usally break in half and leave a part stuck inside your chassis usually (cause that's the really expensive part) and ruins the part.
Aluminum screws are much weaker than steel or stainless steel screws. Here are some tensile stregnths for the materials used in screws.

Grade 8 hardended and tempered screw 150,000 pounds per square inch (psi) tensile strength. (Normal screw in a Losi kit(I believe) breaks with a brittle fracture rather than bends)

316 Stainless steel ( a very common stainless alloy) 70,000 psi There are higher strength stainless steel alloys, but they are more brittle than this alloy)

Titanium alloy 6Al-4V (6%aluminum, 4%vanadium) 95,000 psi (Alloy used by Lunsford)

TiSpec alloy used in climbing equipement 65,000 psi

Generic titanium (found in cheaper screws) 35,000 psi

T6 Aluminum Alloy 42,000 psi

nice site to read about the titanium used in climbing equipment
http://www.ushba.com/tifacts.html

Last edited by John Stranahan; 11-17-2002 at 08:34 PM.
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