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10-05-2015, 07:20 PM | #1 |
Newbie Join Date: Sep 2013 Location: PA
Posts: 25
| I need a water proof servo
Hey everyone. I'm looking for a waterproof servo. Mine is dead it didn't survive my waterproof job I did on it.. I'm looking for one on Amazon but there are tons of choice. I mostly crawl. Sometimes in water and sometimes it gets submerged completely. Its stock using 7.2v battery but future plans to go 3s Lipo Please let me know what you would recommend. Thanks! Also any recommendations on 3s Lipo and charger. Looking to fit it in the stock honcho. In the stock location - all ideas and suggestions welcome too!! ;) Last edited by rage232; 10-05-2015 at 07:33 PM. |
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10-05-2015, 08:00 PM | #2 |
I wanna be Dave Join Date: Jul 2014 Location: Deep South
Posts: 3,444
| Re: I need a water proof servo
Somewhere at Lowes are at any parts house they'll have a non aerosol can of PlastiDip. Get a servo of you're choosing and submerge the entire thing into this can. Pull it out and let it dry then cut off enough to get the servo horn on. You'll be good to go. Or you can spray it on.
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10-05-2015, 08:01 PM | #3 |
I wanna be Dave Join Date: Nov 2014 Location: West Texas
Posts: 2,654
| Re: I need a water proof servo
Hitec 646wp is waterproof and will handle 7.2v. However you will need a bec for 3s.
Last edited by snapon boy; 10-05-2015 at 08:04 PM. |
10-05-2015, 08:54 PM | #4 |
Rock Crawler Join Date: Oct 2013 Location: Wiscasset, ME
Posts: 623
| Re: I need a water proof servo
Get any servo that suits your build, and then use conformal coating. 2 coats of acrylic is what I use, but silicone also is popular. If you can get your hands on a Holmes Hobbies servo, they are super powerful and factory waterproofed. |
10-05-2015, 09:35 PM | #5 |
I wanna be Dave Join Date: Sep 2006 Location: Anchorage, Alaska
Posts: 3,099
| Re: I need a water proof servo
many servo's already have O-rings sealing the case. tho' a good coat of plastic dip further inures a complete seal. Besides the casing... The most important area to have concern for... would be the area at the servo's output shaft. Besides plastic dipping the whole servo body. Put a well greased rubber shock O-ring on the output shaft, sandwiched between the servo horn and the body of the servo. If one isn't enough... use two. * Excessive grease looks bad... but retards water well... so don't wipe away the excess grease lathered over top the O-ring(s). * Don't use two O-rings if they might restrict the output shaft's movement. just touching both surfaces when sandwiched... but not to the point of impairing /restricting movement. Some folk also fill the internal gear chamber surrounding the output shaft... with grease... to further retard water intrusion. Probably a good idea to check anyways... because many mfgr's put just a smidgen of grease on those gears. As long as the case stays sealed... and the O-ring sandwich's well enough on the output shaft... and was greased properly... should hold up to submersion. The other more difficult option would involve break down and water proofing of the internal pc board as well. But if sealed well at the exterior... should stay dry. |
10-06-2015, 08:05 AM | #6 |
Newbie Join Date: Sep 2013 Location: PA
Posts: 25
| Re: I need a water proof servo
Hi everyone thanks for the replies. I did watch the plasti dip video from Rc Sparks. I dipped it fully, twice. However I use grease and rtv sealent instead of the rubber o ring. I have had it fully submerged and it worked well. Then it sat for a couple of weeks. It worked for another crawl session (no water) so I was certain my waterproofing worked perfectly. It sat for another week or so But yesterday the servo was just making a ticking sound as soon as u turned it on. Not a grinding just a tick and wouldn't react to any input from the controller. I was tinkering with it. Forward and reverse were ok but no steering. Then the ticking stopped The servo felt pretty hot. Didn't see smoke or anything. Thanks snappy boy I'll look that servo up as well as a bec!!
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10-06-2015, 08:58 AM | #7 |
I wanna be Dave Join Date: Jan 2005 Location: Raleigh-ish vicinity
Posts: 3,846
| Re: I need a water proof servo
I really like the Xpert WR-7701 for a waterproof servo. It has plenty of power and is designed to operate fully submerged. My servo has been swimming plenty of times and it is still going strong. Xpert 7000 Series "Mega Torque" Metal Gear Waterproof Digital Brushless Servo |
10-06-2015, 09:38 AM | #8 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| Re: I need a water proof servo
Plasti dip is not a good waterproofer. When it works, it works. But it can fail at any point because it is an easily removable coating. Says so on the product, peelable. Because of this easy to remove peelable nature, plasti dip does not adhere to the object fully. Once you get a little peeling around a wire, moisture gets between the plasti dip and the electronics. Also likely, water wicks down the inside of wires (they make great water wicks) and gets between the plasti dip and electronics. Then it is just a matter of time until corrosion sets in and stops your fun. Use "conformal coating". Silicon is easy to work with and removable with acetone. Acrylic is easy to work with and more permanent. Both fully adhere to the electronics and PCB. Even if water wicks down the wires, it has nowhere to go once it hits the layer of conformal coating. Even if the conformal coating peels back from your wires, water can't go further than where the wire is soldered onto the board. |
10-06-2015, 12:31 PM | #9 | |
RCC Addict Join Date: Aug 2012 Location: The Garage!!!
Posts: 1,386
| Re: I need a water proof servo Quote:
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10-07-2015, 04:12 PM | #10 |
Newbie Join Date: Sep 2013 Location: PA
Posts: 25
| Re: I need a water proof servo
I don't want to spent $100 either.. What's wrong with this: http://www.amazon.com/HiTec-35646W-H...terproof+servo or this: http://www.amazon.com/Traxxas-Digita...terproof+servo or this: http://www.amazon.com/Waterproof-Tor...of+servo+axial Sorry I'm not very knowledgable in the RC world which is why I bought RTR. My plasti dip should have worked. Since it didn't, i'm not bothering with attempting my own waterproofing again.. I want one waterproof, plug n play. Thanks |
10-07-2015, 04:24 PM | #11 |
Rock Crawler Join Date: Jan 2012 Location: middle TN
Posts: 612
| Re: I need a water proof servo
A friend of mine swears by the expert waterproof servos. They have Plenty of power and he has submerged his several times without issue.
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10-07-2015, 04:24 PM | #12 |
MODERATOR™ Join Date: Jul 2004 Location: Ohio
Posts: 18,928
| Re: I need a water proof servo
They're weak servos. Buy one of them and then you'll wonder why your wheels don't steer.
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10-07-2015, 04:27 PM | #13 |
Newbie Join Date: Sep 2013 Location: PA
Posts: 25
| Re: I need a water proof servo
OK thanks -- good to know. Send me a link to a decent waterproof one. I Have $100 but I was hoping not to blow it all on the servo lol but whatever it is what it is. Send me a link to what you would buy... I think all of them say "high torque" just to help sell... stupid.
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10-07-2015, 04:30 PM | #14 |
RCC Addict Join Date: Oct 2012 Location: Norcal
Posts: 1,261
| Re: I need a water proof servo |
10-07-2015, 04:36 PM | #15 |
Rock Crawler Join Date: Jul 2011 Location: palm desert (southern cali)
Posts: 850
| Re: I need a water proof servo
Damn that's some power Sent from my Nexus 6 using Tapatalk |
10-07-2015, 04:38 PM | #16 |
Newbie Join Date: Sep 2013 Location: PA
Posts: 25
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lol Norton - a link to something that isn't out yet that i can't purchase.. ugh.. lmao What about this? Xpert RC WR-7701 Waterproof "Mega Torque" High Voltage Brushless Servo - Hobby Square There are 3 of them on this site... This seems to be the most powerful yet they are all priced the same.. Are they different sizes? I want something I can pretty much plug n play too if no one caught that earlier. Last edited by THX_138; 02-01-2017 at 09:41 PM. |
10-07-2015, 05:10 PM | #17 |
RCC Addict Join Date: Aug 2012 Location: The Garage!!!
Posts: 1,386
| Re: I need a water proof servo
Just go with a 7955 hitec & use a lil dielectric grease at horn & wire entry!!! I have been running a cs-170(which is basicly the same) for 3 yrs now with no maintnance or issues. I have submerged it more than most believe me, plus when are ya gonna be "under" water its not a watercraft |
10-07-2015, 05:14 PM | #18 |
RCC Addict Join Date: Aug 2012 Location: The Garage!!!
Posts: 1,386
| Re: I need a water proof servo
BTW crawlers need a bec to power the servo period! So olug & play will need to be done at lhs with castlelink programmer to set voltage to get most outa servo.
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10-07-2015, 06:36 PM | #19 |
Newbie Join Date: Sep 2013 Location: PA
Posts: 25
| Re: I need a water proof servo
Should I make another post here?... I'm not entirely sure that I have a Servo issue. It still moves, just extremely weak. I can't see any signs of water damage to the Servo nor the ESC. The plasti dip looks like it held up very well. again, this thing was submerged, but it ran great a few weeks after even. Just picked it up the other night and it wouldn't steer. Here's a video. If this doesn't get much traction i'm going to try another post. |
10-07-2015, 06:52 PM | #20 |
MODERATOR™ Join Date: Jul 2004 Location: Ohio
Posts: 18,928
| Re: I need a water proof servo
Servo motor is toast.
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