NBK Japan MJC-30CS-BL jaw type flexible coupling with 3/8 inch to 1/2 inch bores, stainless steel construction, zero backlash design, accepts angular and parallel misalignment, electrically insulated coupling made in Japan

NBK MJC-30CS-BL Jaw Type Flexible Coupling 3/8 to 1/2
✔️ Stainless Steel Zero Backlash Coupling Made in Japan

This jaw type flexible coupling is designed to connect shafts with different bore sizes while absorbing misalignment and vibration. It’s commonly used in servo systems, CNC machines, automation equipment, and precision drive assemblies where smooth torque transfer and reliability matter.

Pack size: 1 coupling with jaw insert included.

✅ Jaw type flexible coupling with tight fit design
✅ Bore 1 size is 3/8 in 9.525 mm
✅ Bore 2 size is 1/2 in 12.7 mm
✅ Stainless steel hubs for strength and corrosion resistance
✅ Zero backlash at low torque for precise motion control
✅ Accepts eccentricity, angular misalignment, and axial movement
✅ Helps reduce twisting vibration and drive shock
✅ Electrically insulating jaw insert
✅ Made in Japan by NBK
✅ Jaw insert spider color may vary by stock

Coupling Dimensions
All dimensions shown in millimeters and inches

Outer Diameter A 30.0 mm 1.181 in
Overall Length L 35.0 mm 1.378 in
Hub Length B 10.0 mm 0.394 in
Chamfer C 1.5 mm 0.059 in
Bore Depth F 5.5 mm 0.217 in

Bore Sizes
Bore 1 9.525 mm 0.375 in
Bore 2 12.7 mm 0.500 in

Fasteners and Torque
Screw Size M4 M3
Wrench Torque 3.5 Nm 1.5 Nm

💡 Why are jaw type flexible couplings used in precision motion systems?
Jaw type couplings are widely used because they balance flexibility with accurate torque transmission.

• They allow angular and parallel misalignment without stressing shafts

• The elastomer insert dampens vibration and reduces noise

• Zero backlash performance helps maintain positioning accuracy

This NBK jaw coupling is a handy solution for clean torque transfer, smoother motion, and long-term reliability in precision mechanical setups.