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HXT900 9g / 1.6kg / .12sec Micro Servo

HXT900 9g / 1.6kg / .12sec Micro Servo
HXT900 9g / 1.6kg / .12sec Micro Servo

HXT900, one of the most famous and the best value micro servos available.
Used by tens of thousands of hobbyiests world wide. The HXT900 is the #1 trusted low cost 9g servo.

• Plastic Bushing
• 25cm wire
• Coreless motor
• Servo arms & screw included

Size : 21x12x22 mm / 0.74x0.42x0.78 in
Voltage : 3v ~ 6v
Weight: 9g / 0.39oz
Speed : 0.12 sec/60(4.8V)
Torque : 1.6kg-cm
Working Temp : -30C~60C
Gears: Nylon White type

Note: Due to customer demand we have changed back to the original white gear HXT900.

These servos can be found on eBay and other asian sellers at close to this price, however be warned, they do not contain Taiwan/Japan components. HexTronik (the manufacturers of these servos) have two standards, one is for local sale, and the other is export quality with imported connectors and resin gears from Taiwan and Japan.
Our HXT500 and HXT900 are export only, and not built for the domestic market. You will not find the same quality servo for less, anywhere!


Weight (g) 9
Torque (kg) 1.6
Speed(Sec/60deg) 0.12
A(mm) 29
B(mm) 23
C(mm) 26
D(mm) 12
E(mm) 32
F(mm) 16
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Customer Data

Weight: 19g
International Warehouse
Price HKD20.85

  • HXT900 (POM) Replacement Servo Gear Set

    Combo Price: HKD5.81   IN STOCK

Further discounts available for registered & logged-in customers.
 Customer rated
Total of 607 discussions.
Doyle  9 points - 11/27/2014
I find that if I am looking for a park flyer servo this is awesome. To me they are like a hitec hs-55.
am1sh  23 points - 11/13/2014
Are there several versions of this servo? I had some older ones and got new ones. The only visual difference is the screw that connects the arm. The major difference is the travel range. I put one old and one new on the flaps of the BIX3 and they are severely not synced. One travels more to both sides. Even EPA adjustment could not help.
 BuBu1 243 points
I'm aware that there was at least one different version, with black gears that were less reliable, available for a short time. Can you tell us more about the travel? Which one has the longest travel range?
 am1sh 23 points
For full details, take a look here:
 RonRC 3741 points
I too found that the older ones I had worked great. The black geared ones didn't do as well (some stripped easily). However, it seemed when they used the white gears again they worked fine again. Here's the older version on the maiden flight of my flat foam F-22.
 Ral fRotten 2102 points
I bought 6 of the "new" white gear ones after they replaced the black gears none of mine survive today, I don't buy these anymore, I think the new batch's are very weak! the tg9's last longer than these so now I use the HK digital MG and normal digital, and the tg9's at least they last not like these hxt's.
 am1sh 23 points
I'm not referring to the ones with black gears. Google: "hxt900 different editions".
 Ral fRotten 2102 points
neither am I
 BuBu1 243 points
I've seen your video am1sh. To me the gears are probably the same, and they have changed the value of the potentiometer inside. This can be tuned by adding resistors on the servo that has the lowest travel. But it's good to know that we cannot rely on the travel range of these things. For ailerons and flaps we should order them together so they're likely from the same batch.
Alexandre  8 points - 10/30/2014
For sure, as always never working near the limits
 Gerry01 4511 points
Thanks for the credit!
Alexandre  8 points - 10/30/2014
Considering the maximum load of 1,6kgf ok?
 Gerry01 4511 points
Yes, 0.7A is the stall current.
 pipablo 144 points
Ive doubts about the 1.6kg stated. HS-55 have 500ma drain, and even srtronger HS-65HB 650ma. Anyway HXT/900 is a great servo for the price, far better than TG9. But you must be careful not overloading small ubecs (ex. 2amp ubecs is not enough for 3 hxt/900).
Alexandre  8 points - 10/29/2014
What is the maximum current that it drains?
 pipablo 144 points
750ma peak current, high for his type. Go for Hitec - GWS - Futaba for lower drain(near 500ma).
Customer Reviews
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Overall Rating
456 thumbs up!
One of the best and MOST HOT selling servos... These come into stock and within 3 days are again out of stock... HOT SELLING Item. The performance of this servo is extremly good and fast. Very accurate and there are no centering issues. The gears are resin/plastic and for the money totally worth it.
I have been using these on my foamies for a long time now. A bit noisy but torque is good. Highly recommended. Buy them before they go OUT OF STOCK AGAIN.

20 comments. Reply..

Overall Rating
Anders Höglund
129 thumbs up!
These gems are fast and strong, a bit noisy perhaps.

There is a downside of beeing strong and fast, they draw quite a bit of current.
I measured about 550mA when exercising one HXT900 without load. This is an average, it seems to require more peak current. If used together with a linear BEC it will cause voltage drops.

I tried 2 HXT900 with a 1.5A BEC and a Spektrum AR6200 Rx. I could not exercise those two without loosing power to the Rx and cause it to a "BrownOut Reboot".
With four servos connected, I could not even touch the control stick. The BEC circuit also got so hot it melted its plastic sleeve. Still works though, did not fail completely.

I tried with a larger ESC, having a 2A linear BEC, and it worked much better. But I could still force a "brownout reboot" by wildly excerise all four servos. I dare not fly my Pitts this way.

So, with four servos or more and an AR6200 Rx, I think you must use a larger switch mode BEC capable of 3A at least.

This is a combined problem of high current surge, poor power supply and voltage sensitive Rx. And maybe poor filtering of the powerline.
Not really a problem with the servos as such.

27 comments. Reply..

Overall Rating
Anthony Manti
84 thumbs up!
Alot of flyers in the area are just loveing these. Similar, and in some aspects superior performance to the famous HS-81 at one quarter the price.

Here's some stats from the forums here at Hobby City:

Results in degrees/sec.:

@4.8V 450
@6.0V 560
Results in sec/60degrees.:

@4.8V 0.13


Torque Centering
1.3 .2

3 comments. Reply..

Overall Rating
Quinton Marais
77 thumbs up!
These HC babies kick Hitec HS-65HB's into the weeds starting with a massive 6:1 price ratio saving and ~identical physical size26.8hx23.2Lx12w mm at 9g. They use their own horn spine type however and good quality copper servo wire, and make a similar noise. My tests show very slightly higher power drain than a HiTec HS-65HB
@4.8v smooth flying/hard reversals/stalls @/speed
HXT900 160ma/290ma/690ma/0.14-60° (side-by-side with Hitec)
HS-65HB 135ma/260ma/545ma/0.14-60°
I have bought more than 30 of these and never did one give a problem with normal park flying/crashes and they work fine at 6v but be aware the current will rise to 190ma/370ma/690ma for your BEC. This servo allows you to own and operate 6 models where Hitec would limit you to one model. You decide. My recommendation is get more for less - they are basically the same spec. Sure we all have a few models that we like to run expensive servos on, but these HXT900 are the base to build a big pyramid on, and spend the money you save on buying more airplanes and helicopters. I don't consider them anything like a HS55 which = HXT500. 5 star performance for a 10 star price.

6 comments. Reply..

Overall Rating
62 thumbs up!
These are really nice servo, and you get seven of them included shipping, for the price of one in Portugal.
These servant are fast and very accurate, and the price is fantastic.
Five stars.

8 comments. Reply.. here to see all reviews
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