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Technical Specifications
Last Updated: 2026-09-13| Identity | |
| Brand |  |
| Product Number | 31311S |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
51.38 oz-in
3.70 kg-cm
0.4 N-m
4.8V
41.66 oz-in
3.00 kg-cm
0.3 N-m
Bottom 10%
|
| Speed |
6.0V
0.15 sec/60°
400.0 deg/s
66.7 RPM
4.8V
0.19 sec/60°
315.8 deg/s
52.6 RPM
Average
|
| Running Current |
6.0V
180.000 A
180,000 mA
4.8V
160.000 A
160,000 mA
Bottom 10%
|
| Stall Current | 0.7–0.8 A700–800 mATop 10% |
| Physical | |
| Weight | 1.51 oz42.8 gAbove Average |
| Dimensions |
L 1.57 in W 0.78 in H 1.43 in L 39.9 mm W 19.8 mm H 36.3 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | 3-pole |
| Gears | Nylon |
| Gear Spline/Teeth | 24 T estimate |
| Shaft Size | 5.8 mm |
| Rotation Mode | Positional |
| Rotation/Support | Bushing |
| Backlash | 0.500° |
| Control & Signal | |
| Modulation | Analog |
| Direction | Clockwise |
| Rotational Range | 120° |
| Pulse Cycle | 20 ms |
| Pulse Width | 575-2460 µs |
| Neutral Position | 1500 µs |
| Dead Band | 5 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Signal Voltage | 3-5V |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Power Source | Direct |
| Regulator Type | Direct |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | IP4X |
| Certification | ISO | NDAA | RoHS | UKCA | CE |
| Idle Current | 0.008 A8 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 in |
| Origin | |
| Country of Origin | Philippines |
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 | Bottom 10% Stronger than 7% of 192 Analog Standard servos at 4.8V |
| Speed | Average Faster than 38% of 190 Analog Standard servos at 4.8V |
| Weight | Above Average Lighter than 74% of 448 Analog Standard servos |
| Running Current | Bottom 10% Lower draw than 2% of 50 Analog Standard servos at 4.8V |
| Stall Current | Top 10% Lower draw than 95% of 64 Analog Standard servos |
Performance Analysis
| Shaft Power | 0.41–0.63 W |
| Power Density | 0.362 W/in³ More power-dense than 24% of 437 Analog Standard servos |
| Torque Density | 0.9734 oz-in/g Stronger than 10% of 192 Analog Standard servos |
| Torque-to-Volume Ratio | 23.79 oz-in/in³ Denser torque than 15% of 192 Analog Standard servos |
| Speed-to-Weight | 0.12297 (1/sec·g) Faster than 62% of 190 Analog Standard servos |
| Speed-Torque Trade-off | 7.92 Better balanced than 12% of 190 Analog Standard servos |
| Current-per-Torque Ratio | 0.0192 A/oz-in More efficient than 39% of 58 Analog Standard servos |
| Idle-to-Running Current Ratio | 0.000 2nd-highest idle-to-running current ratio of 39 Analog Standard servos |
| No-Load vs Stall Current Spread | 0.01 1st-highest no-load vs stall current spread of 37 Analog Standard servos |
| Torque Gain per Volt | 19.44%/V More voltage-responsive (torque) than 71% of 145 Analog Standard servos |
| Speed Gain per Volt | 22.22%/V More voltage-responsive (speed) than 86% of 147 Analog Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 62% of 229 Analog Standard servos |
| Backlash-to-Range Ratio | 0.00417 Tighter backlash than 64% of 29 Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0027 5th-highest dead-band-to-pulse-width ratio of 49 Analog Standard servos |
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Reviews (9)
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Peter Miller
August 20, 2019Application(s): In alllocations on aerobatic models
Comments: I have flown these for several years in many models and have had at least 20 of them. Never had a failure
Long Time RC Modeler
April 10, 2017Application(s): Throttle, Alerons, Elevator on PT-40
Comments: Just put the model in the air. Everything was smooth for 6 flights. Then on flight 7 poof. No Thottle. Th HS-311 die. I will be pulling all of them out.
Andres
September 30, 2013Application(s): All floght control surfaces and throttle on Hobbico Avistar.
Comments: Flown my Avistar for 6 years now and i never had a problem with these servos. They are really great
riki
March 31, 2013Application(s): its for the thortel for a car
Comments: i have now brought twp hs-311's and i have had the same problem with both of them they work for about 3-4 min then they lock open which means the car is running at full speed.
can't say i'm too impressedSean Moore
September 24, 2012Application(s): Elevator Servo
Comments: I am new to model planes and had an instructor help me set everything up. he took it up for its maiden voyage and everything was going fine until we started to come back in. The Elevators failed and the Brand new plan smashed into the ground thanks Hitec!!!!
siterack_net
June 23, 2012Application(s): Aileron, Rudder, Throttle, Elevator .60 WM Super Chipmunk
Comments: Terrible. Just lost my favorite plane due to elevator servo failure, in flight. Servos are only 1 month old.
Rcflyyer1
May 8, 2012Application(s): Elevator and Rudder Servo For .40 Sized Nitro Sport Airplane
Comments: I used these servos and I was impressed with the Hardware that it came with and the servo arm it had was adjustable which in my opinion was great. Better rubber grommets (rubber cushions that help minimize vibration damage) than the Futaba S3004 since the 3004s can fall out easily and can get lost since they're so small but the Hitecs are a really tight fit and are 1 piece not 2 like the 3004s. With all that said, I thought this would be a great servo but I stood corrected. The ground test was fine and everything seemed to go well but then I took the plane up and lost elevator control! Rudder was still working and the Ailerons which had S3004 servo was still working but without elevator, you're helpless. I think if you plan on putting this servo on an ARF that has tight hinging, work them in REALLY GOOD to use this servo or just go with better Hitec Bearing servos or Futaba S3004s.
Gary Parker
January 13, 2012Application(s): Larger planes
Comments: These are better than you would think considering the low price. They are strong, extremely reliable, and highly resistant to stripping just because the gears are so big. Often you don't need anything fancier.
RocketGuy
November 7, 2009Application(s): Elevons on Combat Wings XE2.
Comments: Perfectly decent servos, no real issues. They are a bit noisy like most servos. I crashed the hell out of the wing repeatedly, they never broke or seemed to have an issue as a result, pretty darn solid.