The KST MS589 HV Coreless Contactless Servo is a high-voltage mini servo for helicopter cyclic and fixed-wing applications. It delivers up to 9.2kgf.cm torque at 8.4V and a fast 0.08sec/60° no-load speed at 8.4V. The MS589 uses a contactless magnetic position sensor for position feedback, combined with a coreless DC motor, hardened steel geartrain, and aluminum alloy case. At 15mm thick and about 38g, it is compact for its output class. Product Images Features Contactless position sensor - Uses magnetic position feedback instead of a potentiometer. 9.2kgf.cm torque - Provides up to 9.2kgf.cm at 8.4V. 0.08sec speed - Fast no-load speed of 0.08sec/60° at 8.4V. HV operation - Supports DC 6.0V-8.4V. Coreless DC motor - Designed for smooth and precise movement. Hardened steel gears - Durable metal geartrain for demanding use. Aluminum alloy case - Adds rigidity and heat dissipation. Programmable support - KST lists programmable support and programmable soft start. Specifications Parameter Value Model KST MS589 Rated Voltage DC 7.4V Voltage Range DC 6.0V-8.4V Stalling Torque 6.5kgf.cm @ 6.0V; 8.0kgf.cm @ 7.4V; 9.2kgf.cm @ 8.4V No-Load Speed 0.10sec/60° @ 6.0V; 0.09sec/60° @ 7.4V; 0.08sec/60° @ 8.4V Working Frequency 1520us / 333Hz Default Travel Angle ±100° / 200° total Temperature Range -10°C to +65°C Case Material Aluminum alloy Motor Type Coreless DC motor Gear Set Material Hardened steel Position Sensor Contactless sensor Case Dimensions 35.5 x 15 x 32.5mm ±0.2mm Weight 38g ±10% Shopify SKU KST-MS589-HV Reference Documents KST MS589 Technical Specification Application Helicopter cyclic control - Suitable for cyclic applications needing compact high torque. Fixed-wing aircraft - Useful for control surfaces requiring fast and strong movement. HV receiver systems - Supports compatible 6.0V-8.4V setups. Contactless feedback builds - Magnetic sensing supports accurate position feedback without a potentiometer. Servo upgrades - Confirm dimensions, horn fit, voltage, travel, and signal settings before replacement. Competition model setups - Fast speed and high torque support demanding model-aircraft control. Packing List Description Quantity KST MS589 mini servo 1 Accessory pack 1 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; } Does this product have multiple Shopify variants?No. Shopify currently lists one variant, SKU KST-MS589-HV. What type of position sensor does it use?KST lists a contactless position sensor. What is the maximum listed torque?The maximum listed stalling torque is 9.2kgf.cm at 8.4V. What is the fastest listed speed?The fastest listed no-load speed is 0.08sec/60° at 8.4V. What comes in the package?The package includes 1 x MS589 mini servo and 1 x accessory pack.
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