MSX-39K-10x14xSP 10mm to 14mm Flexible Slit-Type Coupling - NBK Japan

NBK MSX-39K-10x14xSP Flexible Coupling
✔️ Zero-backlash, high-rigidity shaft connector for servo & stepper motors

The NBK MSX-39K-10x14xSP is a high-precision flexible shaft coupling from NBK’s MSX series, built for demanding motion control setups like servo, stepper, or high-performance motors. This slit-type aluminum coupling ensures high torsional rigidity, zero backlash, and stable torque transmission, ideal for precise positioning in robotics, automation, or CNC systems.

✅ Type: Flexible Slit-Type Coupling
✅ Outer Diameter: 39 mm
✅ Length: Approx. 44-50 mm (varies by fastening)
✅ Bore Sizes: 10 mm × 14 mm
✅ Material: A7075-T6 Aluminum Alloy (unless SP denotes PEEK or alternate)
✅ Surface Finish: Anodized or custom (varies by SP spec)
✅ Fastening Method: Likely clamping or set screw (SP-specific)
✅ Zero Backlash: Yes
✅ Torsional Rigidity: High, optimal for servo positioning
✅ Max Torque Capacity: Estimated higher than 2 N·m (MSX-34 benchmark)
✅ Temperature Range: Standard aluminum - up to 80°C; PEEK (if SP) up to 150°C
✅ Vibration Dampening: Low; designed for rigid, immediate response
✅ Quantity: 1 Coupling

Applications:

• Precision Servo Drives

• Robotics and Pick-and-Place Units

• 3D Printers and CNC Machines

• Semiconductor and cleanroom automation (if SP = PEEK)

Performance Highlights:

• High static torsional stiffness, minimal temperature drift

• Suppresses stepper motor hunting and vibration

• Handles angular, parallel, and axial misalignment

💡 What does a zero-backlash coupling do in servo motor systems?
Zero-backlash couplings eliminate play between the motor and the driven component, making them perfect for high-precision motion tasks:

• Maintains accuracy under load without shift or delay

• Prevents oscillations in feedback systems

• Essential for fast acceleration and deceleration cycles

• Ideal for dynamic motion applications like robotics or PCB routers

If you're looking to level up your motor-driven equipment with rock-solid connection and zero slack, this MSX-39K coupling might just be the one. Need help confirming the SP variant? Reach out and we’ll sort it out for you!