The KST CM5018WP Coreless DC Motor Metal Gear Servo is an IP67 waterproof-rated high-torque servo for RC rock crawlers. KST positions it for 1/10 and 1/8 scale crawler applications that need strong steering output and wet-condition durability. Verified KST data lists a DC 4.8V-8.4V voltage range, up to 50Kgf.cm torque at 8.4V, and 0.18sec/60deg speed at 8.4V. It uses a coreless DC motor, hardened steel gears, potentiometer feedback, and 2 ball bearings. The 40.5 x 20.5 x 41.3mm case, 25T 6mm spline, and IP67 rating make CM5018WP a strong option for crawler builds requiring higher torque than smaller CM-series servos. Product Images Features 50Kgf.cm peak torque - Listed torque reaches 50Kgf.cm at 8.4V. 0.18sec response - Listed speed reaches 0.18sec/60deg at 8.4V. IP67 waterproof rating - KST lists IP67 waterproof protection for this model. Coreless DC motor - Supports smooth high-torque steering response. Hardened steel gears - Built for heavy RC crawler steering loads. Aluminum alloy case - Rigid standard-size housing. 2BB support - Dual ball bearings support the output shaft. 25T 6mm spline - Output shaft spline is listed in the technical PDF. Programmable soft start - KST lists soft start and programmability. Crawler focus - KST positions CM5018WP for 1/10 and 1/8 scale RC rock crawlers. Specifications Parameter Value Model KST CM5018WP Shopify SKU KST-CM5018WP Rated Voltage DC7.4V Voltage Range DC4.8V-8.4V Torque 35Kgf.cm @ 4.8V; 40Kgf.cm @ 6.0V; 45Kgf.cm @ 7.4V; 50Kgf.cm @ 8.4V Speed 0.25sec/60deg @ 4.8V; 0.23sec/60deg @ 6.0V; 0.20sec/60deg @ 7.4V; 0.18sec/60deg @ 8.4V Start Current 4.68A @ 4.8V; 5.70A @ 6.0V; 7.25A @ 7.4V; 8.15A @ 8.4V Working Frequency 1520us / 333Hz Default Travel Angle +/-50deg = 100deg total Output Shaft Spline 25T, 6mm Case Material Aluminum alloy Motor Type Coreless DC motor Gear Set Material Hardened steel gear Position Sensor Potentiometer Ball Bearing 2BB Waterproof Rating IP67 Case Dimensions 40.5 x 20.5 x 41.3mm +/-0.2mm Weight 80g +/-10% Temperature Range -10C to +65C Programmable Yes Reference Documents KST CM5018WP Technical Specification Application 1/10 scale RC rock crawlers - KST positions CM5018WP for high-torque crawler steering. 1/8 scale RC rock crawlers - Suitable for larger crawler builds when fit and power are verified. RC car steering - Suitable for compatible steering systems after checking case size, spline, torque, and speed. RC crawler builds - Useful where metal gearing and high torque are required for steering load. RC boats and wet models - Applicable only for products with a listed waterproof rating that matches the use case. HV receiver and BEC systems - Works within the listed voltage range when the power supply can handle current draw. Custom PWM motion projects - Can be used in hobby robotics or prototypes after validating duty cycle and cooling. Packing List Description Quantity KST CM5018WP servo 1 Plastic servo horn 5 Servo horn screw 1 Grommet 4 Eyelet 4 Mounting screw 4 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 CM5018WP compare with CM3510MG? CM5018WP is rated up to 50Kgf.cm at 8.4V and IP67. CM3510MG is rated up to 35Kgf.cm at 8.4V and IP65, so CM5018WP offers higher listed torque and a higher waterproof rating. Does OpenELAB list multiple Shopify variants for this product? No. The current Shopify product is a single variant with SKU KST-CM5018WP. What is the maximum listed torque? KST lists 50Kgf.cm at 8.4V. What is the fastest listed speed? The fastest listed speed is 0.18sec/60deg at 8.4V. Is it waterproof? Yes. KST lists IP67 waterproof protection for CM5018WP. What spline does it use? The technical PDF lists a 25T, 6mm output shaft spline. What is included in the package? KST lists one CM5018WP servo, five plastic servo horns, one servo horn screw, four grommets, four eyelets, and four mounting screws. What should I check before installation? Confirm case dimensions, 25T 6mm spline, steering load, waterproof requirements, and the BEC current margin for high-load steering.
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