What Do *You* Do With Your Clapped-Out Servos? - RC Groups
Thread Tools
May 02, 2012, 07:21 PM
just Some Useless Geek

What Do *You* Do With Your Clapped-Out Servos?

So, I've got a bag full of servos that have Bit the Big One in one way or another. Mostly they are stripped gears, but some are smoked completely. Those that have bad gears probby aren't worth taking apart to put fresh gears into them. Maybe one or two of the Futabas, but certainly not the el cheapo stuff from Hitec, Dynam, Vigor, Blue Arrow, hexTronik, Tower Pro, PowerHD, yada yada yada.

In particular I have a ton of TP51R/HXT500 "five gram" (actual 6.4 gram) servos that have stripped gears. Now, these are fine servos for lightweight applications in park flyers, but when you start to put them into 350 gram airplanes and smash the stuff into the ground, trees, and other airplanes, well...they tend to <ahem> stop working. [Note that the HXT900, the "nine gram" (actual 10.6 gram) bigger brother to the HXT500, is a very nice servo for four bucks. I haven't had a single one of those fail yet. I'm trying, though.]

So I've got all these multiple servos with munged gears. The servo amps still work; the motors spin; the pot still provides positional feedback. What do y'all think should be done with this stuff?
Sign up now
to remove ads between posts
May 03, 2012, 03:31 AM
srnet's Avatar
Cut the leads off and save them.

Throw the rest away, to prevent them being accidently used again.
May 03, 2012, 03:50 AM
Registered User
You could always replace the gear set. I just had a quick google search and found them at Hobby King for 99 cents. I know in your post you said that it was not worth it but if you have an order it would be worth added a few gear sets.



May 03, 2012, 05:12 AM
Registered User
Zen09's Avatar
Use the electronics as a brushed two way (micro) ESC. Or RC switch.
May 03, 2012, 05:38 AM
just Some Useless Geek
Okay let's see.

I don't want to throw away perfectly good servo amplifier and drive packages if I can get the gearset for less than a buck (well over a dollar after you add all the other costs involved). However, I also don't want to take apart a non-serviceable servo (heh) just to replace the broken gears. (Note that the HXT900 is held together with screws, so it can be rebuilt easily.) Keep in mind that this is a servo that comes to my front door for about $4.50 or so, maybe a little less.

I do like the idea of using some of these little buggers as switches. I'd have to add a FET or something to the output to get reasonable current capability, though, because the original servo motor is pretty tiny. Perhaps the idea of using some as ESCs for micro brushed planes makes sense. I like it!
May 03, 2012, 08:44 AM
Registered User
Cougar429's Avatar
I rarely ran the 500, but as one of the early proponents of the 900 had close to 170 flights on one of my early helis before servo failure. Just be aware there are LOTS of poor copies out there that try to push themselves off as true T/P HXT servos. I would strongly recommend against investing in gearsets if you have any time on these small servos or if so place them in a non critical app. The gears are not the only item to wear. Under heavy loads the motor brushes wear rapidly.

p.s. I could use several of the leads if possible. Some of the better servos came to me with cut or modded leads and I love to make them serviceable again.
May 03, 2012, 03:30 PM
just Some Useless Geek
Cougar, take a look at Hobby King for connector supplies. They have the best availability and prices I've ever seen on connectors, wire, cable, yada yada. Oh, and I've completely dropped the Deans T connector in favor of the vastly superior XT60 and its descendants.

But I'm not chopping up my "dead" servos until I know I really don't have any use for them. Heh. Waste not, want not, y'know?

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Poll What do you do with your Old Timer? orange&white Vintage & Old-Timer Designs 17 Apr 25, 2012 04:14 PM
Discussion How do you space out your components for FPV? TheNiceGuy Multirotor Drone Talk 0 Mar 28, 2012 04:23 AM
Discussion What can you do with so much channel on your transmitter (Related to the Fut. T18MZ) Andreasdiaz Beginner Training Area (Aircraft-Electric) 10 Feb 03, 2012 03:17 AM
Poll What do you do with your Aerial Photography craft? yashmack Aerial Photography 6 Jan 30, 2012 12:13 PM
Question What do you do with your kit remains? pick013 Scale Boats 19 Jan 27, 2012 12:27 PM