Industrial Heavy-Duty Electric Linear Actuator

The DMDT Series Industrial DC Electric Linear Actuator is a heavy-duty linear actuation system developed by Hebei Demai Transmission Machinery Co., Ltd. It is specifically engineered for high-reliability transmission applications in harsh industrial environments. The series has matured into a well-established product line with non-standard customization capabilities, an annual production capacity of approximately 1,000 units, and wide applicability in lifting, hoisting, tilting, and translating operations.

In terms of structure and design philosophy, the DMDT series adopts an advanced housing design concept. The entire unit is constructed from high-strength, wear-resistant materials combined with precision-machined components, delivering outstanding load-bearing capacity while simultaneously achieving low noise, impact resistance, and long service life. The internal mechanism uses a standard acme screw as the core transmission element. The duty cycle is rated at 30%, and the unit is pre-filled with long-life grease, making it essentially maintenance-free during regular operation and significantly reducing upkeep costs.

Looking at the core performance parameters, the series delivers a maximum load of 300 tonnes and a maximum input speed of 1,500 rpm, with thrust coverage ranging from light-duty to heavy-duty models. The head connection types include flange, clevis, ball joint, and threaded options, accommodating various load interface requirements. The input shaft is available in both single-shaft and dual-shaft configurations. The dual-shaft input enables differential speed control or multi-motor collaborative driving, as discussed previously.

Drive system compatibility is one of the DMDT series' standout features. It can be paired with 12V, 24V, 36V, or 48V DC motors, as well as 220V or 380V single-phase or three-phase AC motors. It also supports stepper motors, explosion-proof motors, geared motors, servo motors, and other power sources, covering virtually every common power supply and control scenario found in industrial environments.

Regarding environmental adaptability, the standard operating temperature range is 5°C to 40°C. For extreme temperature applications ranging from -40°C to +70°C, customers can contact the manufacturer's engineering team for a dedicated design. The ingress protection rating starts at IP54 and can be upgraded to IP56, IP65, or IP66. The insulation class is F, with H-class options also available. This allows the unit to operate reliably in dusty, humid, or even water-spray environments.

In terms of functional features, the DMDT series includes a self-locking function. Each model has a corresponding self-locking coefficient, meaning the load will not drop when power is cut. This is critical in lifting and tilting applications. The series also supports synchronous driving of multiple actuators. When equipped with an encoder, multi-point precision positioning is achievable with a positioning accuracy of up to 0.1 mm, meeting the stringent position control demands of automated production lines. Additionally, a wide range of optional accessories are available, including potentiometers, Hall effect feedback sensors, photoelectric proximity switches, external stroke limit devices, and hand-crank mechanisms, enabling adaptation to various complex working conditions.

The series also incorporates a built-in overload automatic protection device. When the actuator reaches its limit stroke or the load exceeds the rated thrust, the power supply is automatically cut to protect the motor and internal components from damage. However, this built-in protection cannot replace an external stroke limit switch, and this should be taken into account during model selection.

Overall, the DMDT series is a general-purpose electric linear actuator designed for heavy-duty industrial scenarios. Its flexible drive options, broad environmental adaptability, strong functional expandability, and non-standard customization capability make it highly applicable in mining machinery, port equipment, automated production lines, construction machinery, and many other fields. The official website is http://www.dermail.cn, where customers can directly consult with the engineering team for model selection or customization inquiries.