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Technical Specifications
Last Updated: 2026-10-08| Identity | |
| Brand |  |
| Product Number | FUTM0721 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
7.4V
305.60 oz-in
22.01 kg-cm
2.2 N-m
6.0V
272.20 oz-in
19.60 kg-cm
1.9 N-m
Average
|
| Speed |
7.4V
0.06 sec/60°
1,000.0 deg/s
166.7 RPM
6.0V
0.07 sec/60°
857.1 deg/s
142.9 RPM
Top 10%
|
| Physical | |
| Weight | 2.72 oz77.0 gBelow Average |
| Dimensions |
L 1.594 in W 0.827 in H 1.457 in L 40.5 mm W 21.0 mm H 37.0 mm |
| Case Material | Metal |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Titanium |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 120° |
| Pulse Width | 920-2120 µs |
| Neutral Position | 1520 µs |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Connectivity | |
| Connector | Futaba J |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Average Stronger than 61% of 1043 Digital Standard servos at 6.0V |
| Speed | Top 10% Faster than 91% of 1041 Digital Standard servos at 6.0V |
| Weight | Below Average Lighter than 18% of 1902 Digital Standard servos |
Performance Analysis
| Shaft Power | 7.19–9.42 W |
| Power Density | 4.903 W/in³ More power-dense than 78% of 1759 Digital Standard servos |
| Torque Density | 3.5351 oz-in/g Stronger than 51% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 141.72 oz-in/in³ Denser torque than 60% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.18553 (1/sec·g) Faster than 83% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 19.06 Better balanced than 35% of 1031 Digital Standard servos |
| Torque Gain per Volt | 8.76%/V More voltage-responsive (torque) than 14% of 850 Digital Standard servos |
| Speed Gain per Volt | 11.91%/V More voltage-responsive (speed) than 30% of 871 Digital Standard servos |
| Voltage Range Width | 1.4 V Wider voltage range than 37% of 1539 Digital Standard servos |
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Reviews (1)
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Chris from Norway
March 16, 2017Application(s): 1/8 EP Offroad Buggy HB Racing E817 E-Buggy Team Orion Vortex R8.1Pro 180A E.S.C Team Orion VST2 Pro 690 size 2100kV Sanwa RX-472 receiver 2x Team Orion Carbon Pro Ultra 4500maH 7.4V Shorty LiPo hardcase batteries Futaba S9353HV steering servo with Full Metal Case from the special edition O.S Speed Tuned B1
Comments: The S9353HV from Futaba is by far the best servo I have ever tried, and in my honest opinion, this top tier servo even outmaneuvers the all new and more expensive S9373SV in many areas, first and most important is perhaps its very nicely balance between torque and speed, I have always been quite impressed by the massive amounts of torque that some of these last gen servos are capable of delivering, at least on paper. But a major question is if there is ever a time when you really need 40kg of Torque,or more for that matter, in a 1/8 Offroad buggy, nitro or not. I have never Experienced problems that could be traced to having too little torque available in my steering servos, except for the first and last time I purchased a RTR Kyosho Inferno MP9 tki3, which was fitted with a pair of Syncro Ks-401's, which cant really be considered as more than junk with the sole job of filling a vacant slot really, and on this "rookie racer" I replaced every nut and bolt, and about everything in between before the first season was over.Just to clarify, the ks-401 has something like 9kg i believe, but im not sure about that. I have always believed that a steering servo for 1/8 buggy should atleast have 13kg's of torque and should not be slower than 0.15s/60' ,but any servo that is precise, jitter-free, low noise levels, with torquelevels beyond 20kg , that also is capable of extreme lightning speeds of less than .10s/60' is a white elephant in my book. The s9353HV also comes with a exclusive full metal case,it is 100% waterproof and every part is made with the highest attention to detail,quality is second to none, and even compared to the newer BLS177sv, BLS275sv or the s9373sv that replaced it,this is a servo with very few counterparts and is still today seen as a integral part of winning car setups in the highest levels of RC.