Corona 939MG Metal Gear Servo 2.5kg/ 12.5g/ 0.14sec

 Regulus 1 points

This is an analog servo

 vladislaw 47 points

it digital servo 400 mg

 aggb1 16 points

This is exactly analog servo..

 jaccies 55 points

not all gears are metal, the first gear is resin

 Berkie 137 points

I didn't say they were & if one is resin the term "metal geared" still applies. Why award a credit for an answer that does nothing to contribute to the discussion?

 jaccies 55 points

i received last week 10 pieces, on the box is stated metal gear, but that is wrong it should be stated as resin/metal gear, because the first gear is resin.
This is important to know for this discussion.

 Joseph 8 points

If you have ever heard the saying "A chain is only as strong as its weakest link" than you know that the resin gear is what untimely makes the servo weak. With that said its not that bad because it is the first gear (meaning the gear on the motor) so therefore there is very little force applied on that gear because the true force is at the end of the gearbox where all the rotations of the motor add up. In conclusion I'm just trying to say that the first gear being resin does not matter that much, however I myself would pay a little extra to get one that is all metal just to be safe.

 __bare 708 points

Of all the gears that I have stripped over the years it's always either the first or second gear that loses teeth

 __bare 708 points

oops... first and second from the output Not the motor

 Fausto 9 points

é* muito lento, usa o 919mg, ele nã*o é* muito forte mas segura um voo sport tranquilo

 BernardoUruguay 259 points

Hi. I use it with 1520us 333mhz since it´*s the only info I could find in the manual. PLease credit

 jo3natan 3 points

that setting is for digital servo. just receive the item, the packaging say its analog servo. pls advice.

 WeKkY 60 points

I think , with the noise they do , that these are digitals servos.

 Stevegauth30 77 points

These are great servos. For the price too. Really good response, and no twitching or glitching. Real smooth.

 LU4DPO 9 points

very very very good

 Karl- 3 points

You can use this servo for cyclic, although I would not use it for 3D types of helis. Is not fast enough for that type of setup.

 Mateusz 2 points

Unfortunatly there are no parts for this servo. But the prize of it is not very high:)

 Micho69 272 points

not yet

 Gidro 6 points

probably in the course of complex engineering calculations concluded that the possibility of using plastic in the first gear stage :)

 billum2 172 points

Metal geared servos frequently have plastic gears near the input section. You didn't give any clues as to how the damage was caused. In a crash something will usually give, sometimes the gears, sometimes the horns or case. If yours happened in normal use maybe the servo was too small for the job. These are budget servos at the low price end too. I sometimes wonder whether we are offered these extra inexpensive servos because they have inherrant design problems. You pays your money********-

 Fabio Diego 84 points

Friend, this servo works yes, but it is not reliable for the load it could bear and that you perform the maneuvers with your helicopter. The original servo T REX is the DS510 that support 3.7 kg while that holds a maximum of 2.5 kg There is a big big difference in price.

 marcelommm3 96 points

I flew my HK500 with this servos on frame. If you dont want to do 3D flights, can be used... But a stronger servo is a better choice!

 *Murdock* 34 points

I would think there is a huge difference: The sticker *-)

 juan carlos 7 points

I purchased both and I found no difference

 Kevin 8 points

With mine, I found the Corona servo wont do dual rates. I then plugged in the hobbyking servo same equivalent, and they would do dual rates. Just my 2 cents :)

 Shura 122 points

Thanks!

 christiano 76 points

sã*o sim, que nem a corrente de 100000000000000000000000000000

 alexandre neves 1 points

www.link

 Bikalho 149 points

Nã*o serve, fica muito grande. Este servo serve para carros 1:1

 D-Creator 52 points

No, ALL gears are metal

 am3388 20 points

As all other metal gear servo. Only the last stage of gears is metal.

 magnusEl 1207 points

That is right. The firs gear (after the motor piniong) is made off plastic. The stress on that gear is not high, so a plastic one is normaly moore then enugh.

 Shura 122 points

Yes, the first gear is plastic. It is normal, don't worry

 mannyman535 47 points

digital and ones analog

 Shura 122 points

I have it working fine

 kanara27 16 points

You can`t mix digital and analog servos. Corona 939MG is digital servo, HXT900 is analog.

 PILOTERO 36 points

digital servos use to make an electronic sound. That's normal.

 Baudy 1 points

No, this servo is not digital, It's analog servo. it says right on the box.

 kanara27 16 points

I didn`t find gear kit for this servo in HK. The plugs are standart, I think will fit for your receiver.

 __Waco 304 points

This servo is fitted with metal gears and I thing the gears is the last thing, what you will need... And when, look on the Price, buy a new one!

 Cesar Eduardo 4 points

For the price i think its better to get a new one if you have problems with the gears. About the plugs, it fits futaba receivers perfectly.

 Shura 122 points

there no in HK kit for this servo. The plugs are universal

 KuGhi 12 points

1 month

 Shura 122 points

almost 1 month

 Wireman 343 points

Nobody can tell until we can put them into the test bench and see how they perform.

 Yuto Kang 11 points

Anyone know where to find replacement servo arms for this servo?