Precision Redefined: DBL31 Series Taper Sleeve Single Diaphragm Couplings

The DBL31 Series is a high-performance single diaphragm coupling designed for zero-backlash power transmission in precision motion control. By utilizing an integrated expansion taper sleeve connection, the DBL31 eliminates the need for keyways, ensuring a high-friction, uniform grip on the shaft. Constructed from premium 45# steel and high-grade 304 stainless steel membranes, it is the perfect link for high-speed, high-sensitivity ball screw and spindle drives.

Core Product Advantages

• Keyless Taper Sleeve Connection: Features an internal expansion mechanism that creates a powerful friction bond. This ensures easy installation and removal while protecting the shaft from surface damage.

• Zero Backlash & High Sensitivity: Specifically engineered for precision positioning, providing identical clockwise and counter-clockwise rotation characteristics with absolute zero play.

• 304 Stainless Steel Diaphragm: The high-elasticity stainless steel disc pack compensates for angular and axial misalignments while maintaining exceptional torsional rigidity.

• H7 Precision Standard: All internal bores are machined to H7 tolerance, ensuring superior concentricity and minimizing vibration at high rotational speeds.

• High Torque, Low Inertia: The optimized 45# steel hub design provides the strength needed for high-torque loads while keeping weight low for responsive dynamic performance.

• Silent & Precise Operation: The tight integration of the diaphragm and hubs results in a quiet, maintenance-free connection even under high-frequency cycling.

Technical Specifications Table