• Welcome to RCCrawler Forums.

    It looks like you're enjoying RCCrawler's Forums but haven't created an account yet. Why not take a minute to register for your own free account now? As a member you get free access to all of our forums and posts plus the ability to post your own messages, communicate directly with other members, and much more. Register now!

    Already a member? Login at the top of this page to stop seeing this message.

BIGW0RM's SCX24 steering slop fix.

BIGW0RM

Rock Crawler
Joined
Jun 4, 2018
Messages
711
Location
Orange County, CA
One of the minor things that bugs me about the SCX24 is the steering slop.The drag link between the wheels is rather loose and flimsy. I noticed that depending on which way I turned the wheels, the bar would flip up or downward. Thus giving the servo link some wiggle room to move.

So I popped the steering linkage off and put some shock o rings around the ball caps. I think I used 3 per side and that keeps the drag link flat so that the servo drag link stay put and doesnt give off all the slack from the drag link tilting. And it doesnt hinder the steering or anything. The drag link can still flip up and down as needed. But it removes a ton of slop in the steering!

Here is a close up on the o rings installed and a servo that fits the servo box tray. The servo stick out past the mounts about 1MM, because servo power wires come out the back. Otherwise it would fit perfectly. In order for the servo link to perfectly aligned, you'd have to extend it out that much anyhow so it works out perfectly. Now I have a much stronger servo (just had it laying around) and no more slop. But the o rings did wonders for the stock servo too.

690ec5c86819b29580b2cb25c17f14f8.jpg

cd9c38a2c390525e36f61415da08f5dc.jpg

09b034f76991e542282f32bf8ccb6c9b.jpg


Servo I used if anyone is looking for one.
https://www.amazon.com/gp/product/B07K4NT9YF/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Specs:
Description Type: Emax ES08MA II/Emax ES08MA V2 Size: 23 x 11.5 x 24 mm (1.25 x.45 x.94in) Weight: 12g / 0.42oz Working voltage: 4.8V~6.0V Working current: 200mA/60° Speed: 0.12sec/60o at 4.8V; 0.10sec/60o at 6V Torque: 1.6/2.0 kg.cm (4.8V/6v) Materials: Metal Gear The line length: 25 cm Standard: Futaba/JR universal plug Includes 1x Emax ES08MA II Servo 1x set of Servo horn 1x set of screws
 
Last edited:
Nice, I was kicking around the idea of whether or not to fiddle with the steering linkage. I was just thinking if its too beefed up maybe to servo would not last long.

I like your mod nice and easy and the link can still flex in a bind.

how is the new servo? thats a sub micro size right?

EDIT: oh and swapping the servo saver out for a normal horn also looks like it should move it back out of the way improving the approach angle or clearance at least.
 
Last edited:
Nice, I was kicking around the idea of whether or not to fiddle with the steering linkage. I was just thinking if its too beefed up maybe to servo would not last long.

I like your mod nice and easy and the link can still flex in a bind.

how is the new servo? thats a sub micro size right?

Same here. I started to put custom links together for the front drag and servo drag links to mount on one side all together. But got worried the C hub would not handle that much stress with one long bolt holding two rod ends. The C hup plastic is rather thin. This might be why the servo drag link connects where it does on the drag link. I dunno. But that's where I started and gave up.

I tested the o ring tweak with stock servo and servo saver and it worked wonders. While I was at it, I slapped that sub micro servo in there since I have a few laying around.

The servo is a sub micro. One of the more torquier cheap ones Ive found. It fits 95% in that servo BOX tray the SCX24 comes with. It sticks out 1MM but the power wire is blocking it from being flush. And you cant cut the back of the tray off since two links attach to it.

Thats the only thing I dont like. The servo slop and servo tray design that limits sub micro servo length.

But this servo powers those big heavy (mine are weighted down) monster truck tires no problem! It one of my favorite little cheap servos.

EDIT: I would have used the stock servo saver if I could. It doesnt move too much unless you really put force on it. I liked its design and spring. But it didnt fit that servos spline. And they both put the ball end on the servo horn about the same place. But yes, lack of saver helps too. But the o rings do the most!
 
Last edited:
Great steering slop fix! What splines are the stock servo? Wires on replacement exit the rear like some BLuebird servos I've seen.
 
Great steering slop fix! What splines are the stock servo? Wires on replacement exit the rear like some BLuebird servos I've seen.

Thank you Natedog.

To be honest, I don't know. The spline on the axial servo and the emax servo looked exactly the same circumference. But one of them had fine teeth and the other had course teeth. And these darn china sub micro servos all seem to have different size splines from one to the other and I dont know what the hell Im looking at.

The EMAX says its a 14T spline. But I have never seen a 14T ever.

From Amazon Q/A:
Customer: Is the servo output spline 25T or 23T?
Seller Answer: Not. This mini servo here is a mini gear 14T




Sorry I cant be more help. I just keep all my sub micro horns in a bag and pray I have one when needed. :lmao:
 
Last edited:
Back
Top