Keyless High-Torque Synchronization: DLZ Series Steel Double Diaphragm Couplings

The DLZ Series 45# Steel Double Diaphragm Coupling with Integrated Expansion Sleeves represents the premium tier of zero-backlash motion control components designed for high-end automation. Engineered with a heavy-duty 45# steel body and imported high-elasticity SUS304 spring stainless steel discs, the DLZ architecture uses integrated internal expansion sleeves (also known as shrink discs or locking assemblies) rather than standard clamping screws to secure the shaft. This keyless clamping connection distributes locking forces completely evenly around the shaft’s diameter, maximizing torque density and preventing shaft scoring under extreme reversing loads. Featuring a dual-disc design, it provides exceptional positioning accuracy while cleanly compensating for axial, angular, and parallel misalignments in critical servo and ball screw links.

Core Product Advantages

• Keyless Expansion Sleeve Integration: Utilizes heavy-duty internal expansion locking mechanisms (胀套) that grip the shaft via high friction, ensuring slip-free power transfer and preventing wear on keyways.

• True Zero-Backlash Transmission: Precision-engineered as an entirely rigid solid-state unit, ensuring flawless, identical clockwise and counterclockwise rotation with zero rotational delay.

• Imported SUS304 Spring Steel Discs: Equipped with premium imported stainless steel diaphragm packs that flex smoothly under tension to neutralize multi-axis alignment errors while maintaining high torsional stiffness.

• Forged 45# Steel Hub Structure: Forged from structural-grade 45# carbon steel to ensure high material fatigue life, deep structural yield limits, and high torque capacity under demanding duty cycles.

• H7 Precision Bored Concentricity: Every single expansion bore is CNC-machined to match exact H7 tolerances, preventing high-frequency shaft wobble and maximizing system operational smoothness.

• Industrial Anti-Corrosive Black Oxide Coating: The entire steel body undergoes a chemical surface blackening treatment to deliver reliable defense against rust, chemical exposure, and moisture while maintaining a clean appearance.

• Symmetric High-Velocity Balance: Designed with a uniform profile that remains perfectly balanced up to 5,000 RPM, making it ideal for high-speed, high-precision indexing drives.

Technical Specifications Table