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KST X20-1035 V3.0 Brushless Tail Servo 12Kgf.cm 0.03sec
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KST X20-1035 V3.0 Brushless Tail Servo 12Kgf.cm 0.03sec
The KST X20-1035 V3.0 Brushless Tail Servo is a high-speed HV tail servo for 500-800 class EP/GP RC helicopters. KST positions it as the tail-servo member of the X20 platform, with brushless drive, hardened steel HLS gearing, and an aluminum case.
Verified KST data lists a DC 6.0V-8.4V voltage range, up to 1.2N.m torque at 8.4V, and 0.030sec/60deg speed at 8.4V. KST's product page also states this as 12Kgf.cm at 8.4V for the same model.
The 40 x 20 x 40mm case, 25T 6mm spline, and about 72g weight make X20-1035 V3.0 a compact standard-size tail servo for fast helicopter yaw control.
Product Images
Features
- 1.2N.m peak torque - Listed torque reaches 1.2N.m at 8.4V.
- 0.030sec ultra-fast response - Listed speed reaches 0.030sec/60deg at 8.4V.
- 500-800 helicopter focus - KST positions it for compatible 500-800 class EP/GP helicopters.
- Brushless DC motor - Supports fast, efficient tail control.
- Hardened steel HLS gears - High Life Span gear construction is listed by KST.
- 6BB support - KST lists 6 ball bearings for the X20 servo platform.
- Aluminum alloy case - Provides a rigid metal housing.
- 25T 6mm output spline - Uses the listed spline for compatible horns.
- 760us/560Hz signal format - Tail-servo command format listed by KST.
- Combo compatibility - Also appears in KST's X20 Combo set with X20-2208 cyclic servos.
Specifications
| Parameter | Value |
|---|---|
| Model | KST X20-1035 V3.0 |
| Shopify SKU | KST-X20-1035V30 |
| Rated Voltage | DC 7.4V |
| Voltage Range | DC 6.0V-8.4V |
| Torque | 0.9N.m @ 6.0V; 1.1N.m @ 7.4V; 1.2N.m @ 8.4V |
| Speed | 0.040sec/60deg @ 6.0V; 0.035sec/60deg @ 7.4V; 0.030sec/60deg @ 8.4V |
| Working Frequency | 760us / 560Hz |
| Command Interface | PWM command; pulse length 450us-1050us |
| Output Shaft Spline | 25T, 6mm |
| Case Material | Aluminum alloy |
| Motor Type | Brushless DC motor |
| Gear Set Material | Hardened steel HLS |
| Position Sensor | Potentiometer |
| Ball Bearing | 6BB |
| Case Dimensions | 40 x 20 x 40mm +/-0.2mm |
| Weight | 72g +/-10% |
| Temperature Range | -10C to +65C |
Reference Documents
Application
- 500-800 class RC helicopter tail control - KST positions it for compatible EP/GP helicopter tail positions.
- High-speed yaw response - Useful where the setup requires the listed 0.030sec/60deg tail response.
- X20 Combo replacement or spare - Matches the tail-servo model used in KST's X20 Combo set.
- HV receiver systems - Works within the listed DC 6.0V-8.4V range when powered correctly.
- 760us tail-servo systems - Fits systems configured for 760us/560Hz PWM command format.
- Custom high-speed mechanisms - Can be used in non-helicopter mechanisms after confirming load, voltage, signal, and travel.
Packing List
| Description | Quantity |
|---|---|
| KST X20-1035 V3.0 brushless tail servo | 1 |
| CNC servo horn | 1 |
| Plastic servo horn | 2 |
| Grommet | 4 |
| Rubber bushing | 4 |
| Screw | 5 |
FAQ
How does X20-1035 differ from the X20 Combo set?
X20-1035 is a single tail servo. The X20 Combo includes this tail servo plus three X20-2208 V8.0 cyclic servos and additional horns/grommets.
Does OpenELAB list multiple Shopify variants for this product?
No. The current Shopify product is a single variant with SKU KST-X20-1035V30.
What is the maximum listed torque?
The technical specification lists 1.2N.m at 8.4V; KST's product page also describes it as 12Kgf.cm at 8.4V.
What is the fastest listed speed?
The fastest listed speed is 0.030sec/60deg at 8.4V.
What voltage range does it support?
The listed voltage range is DC 6.0V-8.4V.
What is included in the package?
KST lists one X20-1035 V3.0 brushless tail servo, one CNC servo horn, two plastic servo horns, four grommets, four rubber bushings, and five screws.
What spline does it use?
The technical specification lists a 25T, 6mm output shaft spline.
What should I check before installation?
Confirm the 40 x 20 x 40mm case, 25T 6mm spline, 760us/560Hz signal setup, HV supply, and tail linkage clearance.
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