NMS Coupling - Key Mechanical Component for Power Transmission in Screening Equipment
As a high-performance genuine accessory tailored for NMS (Nanchang Mining Machinery) vibrating screens—extensively utilized in mining, construction aggregate, and mineral processing industries—the NMS Coupling serves as the critical link for transmitting motion and torque between the screen’s motor and vibration exciter. Engineered to ensure stable power transfer, compensate for installation deviations, and absorb shock loads, it is indispensable for maintaining the reliable and efficient operation of screening equipment in harsh working environments.
1. Product Overview: The Power Link of Vibrating Screens
Vibrating screens depend on precise and consistent power transmission from the motor to the vibration exciter to generate the required vibration for material separation. A substandard coupling can lead to power loss, equipment vibration, premature component failure, or even sudden shutdowns. The NMS Coupling is specifically designed to address these challenges: it efficiently transmits torque while accommodating axial, radial, and angular misalignments between connected shafts, reducing stress on the motor and exciter bearings. Whether for heavy-duty mining screens or high-frequency aggregate screens, this coupling delivers the reliability needed for continuous operation.
Wide Compatibility: Meticulously manufactured to fit all major NMS vibrating screen series, including the YKR Linear Vibrating Screens, ZSG Circular Vibrating Screens, HF High-Frequency Screens, and YA Circular Vibrating Screens. It is a direct replacement for original NMS couplings, ensuring seamless integration with existing screen drive systems without the need for structural modifications.
2. Core Features & Performance Advantages
Premium Materials for Durability & Strength
Depending on application requirements, NMS Couplings are crafted from high-strength alloy steel (for heavy torque transmission) or high-quality ductile iron (QT500-7) (for balanced strength and toughness), combined with wear-resistant rubber or polyurethane elastic elements. The metal components undergo quenching and tempering treatment, achieving a tensile strength of ≥650MPa and hardness of HRC 28-32, ensuring resistance to wear, impact, and fatigue under long-term high-load operation.
Excellent Torque Transmission & Misalignment Compensation
The NMS Coupling adopts a flexible jaw-type or diaphragm-type design (available in multiple configurations to match different screen models). The jaw-type coupling uses elastic elements to transmit torque and compensate for up to ±0.5mm radial misalignment, ±1.5° angular misalignment, and ±2mm axial displacement. The diaphragm-type coupling, ideal for high-precision applications, offers zero backlash and compensates for misalignments without introducing additional vibration, ensuring smooth power transfer.
Shock Absorption & Noise Reduction
The elastic elements (rubber/polyurethane) in the NMS Coupling effectively absorb shock and vibration generated during motor startup and load fluctuations, reducing torque spikes by 20-30% compared to rigid couplings. This not only protects the motor, exciter, and other drive components from damage but also lowers operating noise by 10-15dB, improving the working environment.
Low Maintenance & Long Service Life
With a simple and robust structure, the NMS Coupling requires minimal maintenance. The elastic elements are easy to replace without disassembling the entire drive system, and the corrosion-resistant surface treatment (electrophoretic coating or galvanizing) ensures long service life even in dusty, humid, or corrosive mining environments. On average, NMS Couplings last 1.5-2 times longer than generic couplings.