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07-29-2011, 07:35 AM | #1 |
Pebble Pounder Join Date: Jun 2011 Location: Columbus
Posts: 117
| need a good and cheap servo
i need a good and cheap servo for my rig. right now i am running a hitec hs-625mg and i need somthing with a little more torque. i was thinking either a traxxas 2075 or a tower pro MG995 servo hitec hs-625mg 0.18sec/60* at 4.8v 76.37oz. at 4.8v traxxas 2075 0.17sec/60* 125oz. tower pro MG995 0.17sec/60* at 4.8v n/a which of these three are the better choice for crawling. the tower pro mg995 is a great servo because it has the same speed as the traxxas 2075, it has all metal gears, and the price is insane $10 with no tax and free shipping, and ive used it in my slash and it worked great. any way i just want someone elses opinnion on which of these three servos is best for a crawler. |
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07-29-2011, 10:00 AM | #2 |
Rock Crawler Join Date: Apr 2010 Location: Central FL
Posts: 509
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I don't have any experience with any of those specific models, but I swear by Hitec. Also, for a crawler steering servo, you want to get as much torque as possible - generally a good mark is 300+ oz if you can afford it. A good servo is one of the things I think it's best to go ahead and spend a little extra money so you don't end up replacing it down the road. |
07-29-2011, 10:09 AM | #3 |
I wanna be Dave Join Date: Aug 2004 Location: central VT
Posts: 2,300
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Sorry, but good and cheap don't go together with servos. Or most electronics for that matter. The Traxxas units, at least all the ones I've had, have plastic output shafts that easily break or strip. I've killed several 2055's and a couple 2075's in their stock applications, much less under the stress of a crawler without a servo saver. The Towerpro servo isn't the one of yesteryear that was actually pretty decent. They are all garbage now with only the name remaining the same. Search on Ultimate RC's youtube page and you'll see the Jang explain it all. The Hitec 645 trades a little speed for more torque compared to the 625. I have four of these and while they are reliable, they lack torque with anything bigger than a 4 inch tall tire. I stripped the gears out of one after a years of abuse in a stock AX-10. If you want really cheap I believe that the gearset, which is about $16, from a 645 will fit into your 625, making it a little torquier and slower. I run a Hitec 7954SH in my AX-10 and SCX and while they are kinda pricy at about $80 on Ebay, I can honestly say that they are worth it. You will have so much torque you'll have to relearn when NOT to steer for risk of breaking other parts of the truck. Both have been super reliable, with about a years worth of abuse on the AX, and going on three monthes of submersible expeditions in the SCX. For less than $50 you can get a Hitec 5645MG or a Savox SC-0251 (make sure it fits your application as it is about 5mm taller than most servos), both of which are quality products. Good luck making a decision and for your own sake, don't cheap out. |
07-29-2011, 10:35 AM | #4 |
Rock Crawler Join Date: Jul 2008 Location: River Falls
Posts: 673
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07-29-2011, 12:06 PM | #5 |
Rock Crawler Join Date: Dec 2009 Location: Beaumont, Tx
Posts: 507
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The towerhobbies th-170 is about as cheap as i would go. Its a rebadged hitec.
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07-29-2011, 12:07 PM | #6 |
Rock Crawler Join Date: Sep 2009 Location: Temecula Ca
Posts: 566
| Cheap and Good Servos. Thats the 2 good to be true. |
07-29-2011, 12:45 PM | #7 |
Pebble Pounder Join Date: Jun 2011 Location: Columbus
Posts: 117
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heres another servo i found on nitrorcx.com, the torque is 208.3oz @ 6v and the speed is 0.16sec/60* http://www.nitrorcx.com/exi-servo-b1228.html heres the "ckrc special" servo http://www.ckrccrawlers.com/ckrc-spe...vo-p-3023.html i dont run a seperate battery for the reciver, how do i get the power supply up to 6v to the servo? Last edited by mini freak; 07-29-2011 at 01:08 PM. Reason: add link |
07-29-2011, 01:14 PM | #8 |
RCC Addict Join Date: Oct 2008 Location: Tyler, TX
Posts: 1,619
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If it doesn't have metal gears then don't bother. Plastic gears strip easily enough as is, even worse when crawling. This is about as cheap as I would go for a servo: http://www3.towerhobbies.com/cgi-bin...&I=LXUZ89&P=ML Torque and speed are lacking but it will get the job done. Next step would be: http://www3.towerhobbies.com/cgi-bin...&I=LXUZ80&P=ML a little more torque and it's digital then there is: http://www3.towerhobbies.com/cgi-bin...&I=LXXPM0&P=ML http://www3.towerhobbies.com/cgi-bin...&I=LXTHR3&P=ML http://www3.towerhobbies.com/cgi-bin...&I=LXWCE6&P=ML Servos aren't one of those areas to cheap out on. It will cause you too much pain and suffering to be worth the few dollars saved. |
07-29-2011, 01:34 PM | #9 | |
Rock Stacker Join Date: May 2011 Location: Fresno
Posts: 76
| Quote:
Standard servo is 1.54x.76x1.52 . Last edited by vette66_00; 07-29-2011 at 01:36 PM. | |
07-29-2011, 01:57 PM | #10 |
Quarry Creeper Join Date: Oct 2008 Location: florida
Posts: 353
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Everything these guys are saying is true, If your going to be crawing in comps you'll need a powerful servo AND a bec to go with it. You don't need speed just lots a torque. I use a Hitec 7980 thats over 600 oz/in.. look for one thats at least over 300oz/in. otherwise you'll just be burning the servos and your cash. |
07-29-2011, 02:09 PM | #11 |
Rock Stacker Join Date: Jul 2010 Location: rosemount
Posts: 70
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i run the traxxis 2075 on my rigs but i would like a little more torqe plus i already stripped the gears in one after 3 months of abuse.so the 2075 prob not the best choice.
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07-29-2011, 02:39 PM | #12 | |
Quarry Creeper Join Date: Dec 2009 Location: Honolulu
Posts: 428
| Quote:
Save up for a high torque servo, it will be well worth it in the long run. | |
07-29-2011, 06:20 PM | #13 | |
Pebble Pounder Join Date: Jun 2011 Location: Columbus
Posts: 117
| Quote:
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07-29-2011, 06:23 PM | #14 | |
Pebble Pounder Join Date: Jun 2011 Location: Columbus
Posts: 117
| Quote:
http://traxxas.com/forums/showthread...t-on-2075-serv | |
07-30-2011, 03:00 AM | #15 |
Pebble Pounder Join Date: May 2011 Location: Spring
Posts: 117
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I run Hitec. Best servo to use. Maybe look into Futaba or JR. Though I do not know what all is out there at the moment. You might think you find a deal on ebay or somewhere for a good looking servo but you will just be out that much more money whereas you could have put it to a good servo to start out with. |
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