The OP I think is venting a little bit but I think also he might be looking for someone to recommend a budget " Full all metal gear servo ". A servo that could survive say a hit with something with wheels at full lock from the speed of a 17.5 blinky. The varying speeds of the two that failed show that durability is more imporatant than speed so looking for a " Basher servo ".

The single plastic gear acts as a one time use only servo saver. Sure you could just keep replacing that part when it breaks but that becomes more trouble than its worth if it keeps failing. Just telling someone get better at driving and do not do what your doing when it fails to stop doing that is not an answer.

One way to figure out whats in some servos before you buy them is to look at the replacement gear set before you buy them (if they have a replacement gear set).

Stripped a gear in my Savox and replaced the gears, good to go. Savox is all metal and they strip as well.

Back in November I ran my last Fastest-Lap Challenge for the year. My son ran a bit off the track and ran over a large bottle cap. After the run-over; we heard grinding and then checked the chassis. I found a broken camber-link ball-cup and the suspension-arm was carved-up from the swing-shaft.

I installed a new camber-link ball-cup (I also installed a new ESC and motor).

Now the chassis pulls to the left.
-the front left and right wheels are pointing straight and they're even(I measured them with a caliper)
-when I turned the ESC on with all electronics connected; there is/was the searching - buzz'n sound come'n from the Servo.

Can a rough run-over cause a steering problem?

(I have an old - but works-fine Futaba 9451 Servo in the chassis. I'm go'n to try the stock servo and see if it gives the same problem.)

Thank You

It is not a secret that our metal geared servos often have a hybrid 1st gear in them. This gear is simply to prevent any EMF from feeding back into the motor and circuit, which would cause glitching and erratic movement. We openly state that to anybody that asks.

The 1st gear rarely ever fails, it's usually the output gear or one of the intermediary gears. A servo saver is always recommended to be used in ground applications. FYI, rock crawlers use our Titanium geared servos (which have a hybrid aluminum, steel, and composite 1st gear) in their rigs all the time and almost never have problems with gears outside of normal wear and tear. Attached is a print ad we ran not long ago with a real cutaway of one of our servos.

Stripped gears is part of racing and bashing, the harder you run your rig the harder you're gonna wear on the gears and eventually something has to break. Fortunately, we offer replacement gearsets for nearly all of our servos, including a 3 pack of the 1st gear for the 5925. And we even offer it direct from us through our airplane outlet:

http://www.weekenderwarehouse.com/hs...mg-mp-gear-x3/

If you want a really durable servo look for a spektrum S6090 they have an all steel gear train. The only downside to the S6090 is that the steel gear will wear out the splines in aluminum servo horns eventually. The S6290 is the similar but has an aluminum output gear.

My experience may be limited but never have I had glitching or erratic behavior on full metal gear servos. Not to mention a non-metal gear doesn't even fully prevent power feeding back into the electronics, because that comes from the electronic parts of the servo. As in, turning the servo horn by hand fast enough will push power into the receiver, metal gears or not. Funnily enough some of my ESCs can even be turned on by turning the wheels by hand in a quick enough motion.

A good servo just doesn't need a servo saver in 1/10 or smaller cars most of the time, except perhaps on 4WD SCT depending on track surface. Of my 9 electric cars only three have/had a servo saver, I reckon car manufacturers are doing away with them because most racers just disabled them anyway because they weren't needed. A plastic gear in the meanwhile can break even with a soft servo saver. Of course rock crawlers won't have as many gear problems because while they need torque, they don't take impacts from jumps at high speeds.

But you can strip a gear in a few hours or in a few years. I've yet to strip a metal gear. Rendered two servos useless due to their plastic gears though (one fully plastic, one with a single plastic gear) despite the presence of servo savers. Not worth repairing as they'd break immediately again, neither lasted even two hours at the track. And not every manufacturer offers single gear replacements, either. I know I'd rather replace a metal gear every few years than a weaker material several times a year. Perfectly servicable actually fully metal gear servos can be had for so cheap nowadays that at least to me it just isn't worth the hassle to use ones with a non-metal gear in them.

I agree, but I just had a plastic Futaba 1st gear fail after a decade of service. I replaced it and the new one went on the 4th run! What'r the odds... I have a couple of alternate gear options on their way to try. I may see if I can get a servo saver to fit, too. It's a bummer to dnf over a little gear..

BTW Xpress, do you know of a hitec cross reference? I have a 5975HB, with "karbonite" gears that I no longer use, but I would if I could swap to metal gears.

I have no dog in this fight, but I had an interesting observation -

Over on the car pages, people seem to advocate spending a small fortune, for reliability's sake, as "you can't win if you don't finish".

Then I come over here and see "I'd rather break a $3 part (and DNF) than a $50 servo"...

That is all, Carry on...

If they were both bought new under a year ago then they have a warranty

Hitec has maybe asked once for a receipt after that I’m in there system and never asked since.

Spektrum well I called horizon about a weak 6100 I bought off eBay “new” week later I got a 6280 to replace it so there is a silver lining if you ask them.

Sometimes stuff happens, that's the nature of this hobby.

The HS-5975HB was a unique servo in that it was a coreless digital with Karbonite gears. We don't really have anything that is cross compatible regarding the gears, which means no metal gear upgrade

Full disclaimer, gears are not covered under our 2 year servo warranty as they are a wear and tear component. We may lend a helping hand if we have a good gear hanging around but usually we have to charge the cost of the replacement gears plus labor to install them. Regardless, the wait time to have something looked at is usually around 5-7 business days from the time we receive it and it's 100% up to you if you want us to proceed with the repairs.

Yeah, not spending 10 dollar on servo saver to keep the servo alive.....

Do you think? If that plastic gear is stripped it means that to much force did come on the gear and could be a reason to deny waranty due abuse.

if the first gear "rarely" strips, why are the replacements sold in 3 packs?

On the JX servos I've been running, it's the second gear that is stripping, but the first gear also starts to show signs of wear, the following is a sample gear that has seen 14+ months of racing in a 1/8 buggy when I started to notice some slop forming under the servo arm and this is what I found, though technically the gear hadn't stripped yet, you can see the sharp shark teeth toward the top:



I had noticed that the grease in the gears was all black and gritty, I almost wonder if it would've been a better preventative to regularly clean the gears and re-grease them, thinking that might allow them to last longer. The servo on the right is a brand new donor servo for a fresh set of gears and fresh grease.

As mentioned, the plastic gear is a one time servo saver. Those gears are sold for those people like the topicstarter who refuse to use a normal servo saver.

And yes, if you do not hit a thing the gears (even if all plastic) will stay alive but when you hit the wall with 60km/h the forces on the gears can go skyhigh. And yes, an all metal gear can survive but if he likes it is another question.

Then again if you hit a wall at 60km/h you have bigger problems than a servo gear