My Xmaxx build

[Tunedfrog]

What is more heavy duty about those pins by RPM? Or are they needed with the RPM carriers?

I honestly can see losing the set screw on the standard pins quicker than the heavy-duty pins. I think it's a good upgrade but I wish it was available for all the arms.

 

[WickedFog]

I honestly can see losing the set screw on the standard pins quicker than the heavy-duty pins. I think it's a good upgrade but I wish it was available for all the arms.

I can see how having a larger head on each end of the pin (bolt head and nut) helps keep those arm clevices from spreading. That would be nice if they made them for the outboard ends of all the arms at least. But I bet you can find bolts that would fit that, like shoulder bolts.

 

[Tunedfrog]

Oh no doubt, our local Ace Hardware is very well stocked with nuts and bolts. This is a great idea.

 

[STONER RC]

Hell yeah thats a great idea. I was thinking that after I picked up my set. Will look for them 3m x whatever. I just don't understand why they don't make them already.. it's rather aggravating

 

[WickedFog]

The only thing about using bolts is you will probably want to find a shoulder bolt. Regular bolts aren't held to a very tight tolerance. Shoulder bolts are precision ground.

What size is that pin?

 

[Tunedfrog]

1.63 x 2.88 x 0.13 inches

 

[WickedFog]

1.63 x 2.88 x 0.13 inches

So the length of the ground part of the pin is 1.63? Wait, that doesn't make sense. I found it is a 4mm pin. So the diameter is .157" diameter.

 

[Tunedfrog]

I would assume so, yes. The 2.88 would have to be the length. I don't know for sure because I'm slow when it comes to stuff like this.

 

[WickedFog]

When I get my arms I will see if I can find some

 

[Tunedfrog]

Next time I and am out and about, I will look also.

 

[STONER RC]

I will measure the pins when I get home in 20 mins.
I was just sitting at a light thinking which is very dangerous by the way.. So why can't we just use the RPM ones on the outer and upper arms. I believe the holes are 3mm. The RPM threaded pins are 4mm. Who says the holes can't be drilled out to fit the RPM ones???

 

[Tunedfrog]

I thought about that myself but I'm sure would void the warranty. if they did break. I have yet to see where anybody had added the heavy-duty pins other than where they were designed to go so, I think I'll just leave them the way they are.

 

[WickedFog]

I will measure the pins when I get home in 20 mins.
I was just sitting at a light thinking which is very dangerous by the way.. So why can't we just use the RPM ones on the outer and upper arms. I believe the holes are 3mm. The RPM threaded pins are 4mm. Who says the holes can't be drilled out to fit the RPM ones???

If you drill those arms out you will weaken the arm a little bit. You are probably better off just using the stock pins in that scenario.

If they only make those pins for the lower hinge, then it is probably not an issue at the other locations.

 

[STONER RC]

If you drill those arms out you will weaken the arm a little bit. You are probably better off just using the stock pins in that scenario.

If they only make those pins for the lower hinge, then it is probably not an issue at the other locations.

Well drilling 1mm out wouldn't really hurt anything. But I'm home now I really don't understand why they don't. The HD holed are 4mm. It's the width of the top and outer holes.
So looks like there's a problem with the turning knuckle. The push rod mount arms. Are shaped so they curve around the back of outer upper arm. So would need a smaller nut width. Or a smaller bolt head.. or counter sink eith the nut or the head of bolt...The inners have some clearance..The RPM bolt head is 4mm deep and 6mm wide.. The rears don't matter they clear inner outer uppers..
Going to see if I can find bolts on line in a few got to do some stuff on the honey due list. Then I'm allowed to play with my toys the boss said
So the stock pins are 4mm also. So it's about length and the depth of bolt head or depth of nut. Could counter sink the head of the RPM pins. The arm hing is 12mm thick only need to sink it 3mm and can get nylon washers for the other side. To adjust the length on the front side of the arm... it just might work. Drill out to counter sink is fine because your putting back in the head to fill in hole again.. OH man going to do my chores. Will be back I'm going to think about this. Maybe try it out on the stock arm first. So don't mess up my HDs... them if works will do it to the HDs.. Whats your guys opinion on it????

 

[Greywolf74]

Only thing i would say is if your going counter sink anything it should probably be the bolt/pin head as I'm assuming it at 4mm tall its shorter than the nut is going to be and you're gonna have to counter sink it into the c hub side of the arm. Also I wouldnt counter sink it any deeper than absolutely necessary. Just my .02

 

[STONER RC]

Only thing i would say is if your going counter sink anything it should probably be the bolt/pin head as I'm assuming it at 4mm tall its shorter than the nut is going to be and you're gonna have to counter sink it into the c hub side of the arm. Also I wouldnt counter sink it any deeper than absolutely necessary. Just my .02

View attachment 134144

Oh yeah that would have to be the side that got the head counter sunk into couldn't do it to other side. You would need to do both at that point..The heads only 3mm deep. So it would need 3.1mm deep. Just to be sure.. its completely flush

 

[Greywolf74]

Oh yeah that would have to be the side that got the head counter sunk into couldn't do it to other side. You would need to do both at that point..The heads only 3mm deep. So it would need 3.1mm deep. Just to be sure.. its completely flush

Do you need to countersink it flush? I would only countersink it as far as absolutely necessary. all you need is a couple mm of clearance between the pin head and the c hub. I mean unless its only got a 2mm of clearance already lol

 

[STONER RC]

Do you need to countersink it flush? I would only countersink it as far as absolutely necessary. all you need is a couple mm of clearance between the pin head and the c hub. I mean unless its only got a 2mm of clearance already lol

Yeah it really doesn't have that much to begin with. Going to check out what type of bolts are available. Or even pins with E clips. The screws that hold the retainer are so small. It's like really with all the R&D. The retainer clip with screw is Traxxas best idea. I mean come on. With a truck design like the X. That was your best.

 

[Greywolf74]

Pins with e-clips would be ideal

 

[STONER RC]

Pins with e-clips would be ideal

Yeah I 100% agree. And don't know why Taxxas thought the retainer cap. Was a good idea. All the other Tmaxx's have screw pins. Not sure about the Maxx4s. But either way why a cap. They only pop if your launching the X and it has a very hard landing. Other then that they seem to be OK. Bit I'm still not a huge fan of the plactis cap