The KST A12-610 V8.0 HV Mini Servo is a compact glider-wing servo for gliders and small fixed-wing models that need a strong mini servo with soft-start behavior. KST describes it as an upgrade path from the X12-508 class, with more torque and an all-aluminum housing for heat dissipation and precise mounting. Verified KST data lists a DC 4.8V-8.4V voltage range, up to 9.0Kgf.cm torque at 8.4V, and 0.10sec/60deg speed at 8.4V. The servo uses a coreless DC motor, hardened steel gears, aluminum alloy case, potentiometer feedback, and 1520us / 333Hz command timing. With a 23 x 12 x 27mm case and about 20g weight, A12-610 fits glider-wing installations where a micro servo may not provide enough torque. Product Images Features 9.0Kgf.cm peak torque - Listed output reaches 9.0Kgf.cm at 8.4V. 0.10sec speed - Listed speed reaches 0.10sec/60deg at 8.4V. Glider-wing format - Designed for glider and small fixed-wing servo bays. Soft-start function - KST product data highlights soft start for smoother startup behavior. HV voltage support - Operates across the listed DC 4.8V-8.4V range. Coreless DC motor - Provides responsive control movement. Hardened steel gears - Adds durability for repeated aircraft linkage movement. Aluminum alloy case - Supports precise mounting and heat dissipation. 25T 5mm spline - Uses the listed mini-servo output spline. Compact 20g body - Balances stronger output with mini-servo size. Specifications Parameter Value Model KST A12-610 V8.0 Shopify SKU KST-A12-610-V80 Rated Voltage DC 7.4V Voltage Range DC 4.8V-8.4V Torque 5.5Kgf.cm @ 4.8V; 6.5Kgf.cm @ 6.0V; 8.0Kgf.cm @ 7.4V; 9.0Kgf.cm @ 8.4V Speed 0.13sec/60deg @ 4.8V; 0.12sec/60deg @ 6.0V; 0.11sec/60deg @ 7.4V; 0.10sec/60deg @ 8.4V Working Frequency 1520us / 333Hz Default Travel Angle +/-50deg = 100deg total Command Interface PWM command; pulse length 800us-2200us Signal Voltage High min. 3.3V, max. 5.0V; low min. 0.0V, max. 1.5V Output Shaft Spline 25T, 5mm Case Material Aluminum alloy Motor Type Coreless DC motor Gear Set Material Hardened steel Position Sensor Potentiometer Case Dimensions 23 x 12 x 27mm +/-0.2mm Weight 20g +/-10% Temperature Range -10C to +65C Soft Start Yes Reference Documents KST A12-610 Technical Specification Application Glider wings - Intended for wing servo bays needing more torque than small micro servos. Small fixed-wing aircraft - Suitable where a compact but stronger mini servo is required. Control-surface upgrades - Works as an upgrade after checking size, spline, and travel requirements. HV receiver systems - Fits DC 4.8V-8.4V systems when the power supply is correctly configured. Soft-start setups - Useful in aircraft builds where smoother startup behavior is preferred. Precision linkage mechanisms - Supports compact mechanisms requiring stronger servo output. Packing List Description Quantity KST A12-610 V8.0 HV mini servo 1 Plastic servo horn 5 Servo horn screw 1 Mounting screw 5 FAQ .faq-accordion details { border-bottom: 1px solid #e6eef8; padding: 14px 0; } .faq-accordion summary { list-style: none; cursor: pointer; font-size: 16px; font-weight: 700; color: #1f2933; position: relative; padding-right: 32px; } .faq-accordion summary::-webkit-details-marker { display: none; } .faq-accordion summary::after { content: "\203A"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%) rotate(90deg); color: #007fff; font-size: 28px; line-height: 1; transition: transform 0.2s ease; } .faq-accordion details[open] summary::after { transform: translateY(-50%) rotate(270deg); } .faq-accordion p { margin: 12px 0 0; color: #4b5563; line-height: 1.65; } How does A12-610 compare with X12-508? KST describes A12-610 as an upgrade from the X12-508 class, with higher torque and soft-start support. Does OpenELAB list multiple Shopify variants for this product? No. The current Shopify product is a single variant with SKU KST-A12-610-V80. What is the maximum listed torque? The KST product data lists up to 9.0Kgf.cm at 8.4V. What is the fastest listed speed? The listed fastest speed is 0.10sec/60deg at 8.4V. Does it support soft start? Yes. The product title and KST product data list soft-start support. What spline does it use? The technical specification lists a 25T, 5mm output shaft spline. What comes in the package? The package includes one A12-610 V8.0 HV mini servo, five plastic servo horns, one servo horn screw, and five mounting screws. What should I check before installation? Confirm the 23 x 12 x 27mm body, 25T 5mm spline, travel angle, voltage range, and mounting geometry for your aircraft.
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