Thomas DBZ Flexible Disc Coupling Close-Coupled 5-Inch

Description:

The Thomas DBZ Disc Coupling 5-Inch is a high-performance flexible disc coupling designed to transmit torque while accommodating shaft misalignment in demanding industrial power transmission systems. Commonly installed on pumps, compressors, fans, blowers, turbines, generators, and other rotating equipment where reliable, backlash-free torque transmission is required. Maintenance technicians, OEM manufacturers, and system integrators use this coupling for equipment repair, preventive maintenance, retrofits, and replacement of worn flexible couplings in critical industrial applications. 

Applications:

The Thomas DBZ Disc Coupling features a close-coupled design with two inverted hubs that minimizes shaft-to-shaft spacing while providing high torsional stiffness and zero lubrication requirements. Its stainless steel disc pack accommodates angular, parallel, and axial misalignment without generating backlash, reducing bearing loads and extending equipment life. The coupling is widely used in process industries including chemical processing, power generation, oil and gas, water treatment, mining, and general industrial machinery.

Technical Specifications:

• Brand: Thomas (Rexnord)
• Product Type: Flexible Disc Coupling
• Series: DBZ Close-Coupled Series
• Disc Pack Inner Diameter: 5 in.
• Coupling Size: 301
• Coupling Style: DBZ Close-Coupled
• Disc Pack Profile: Classic Round
• Disc Pack Material: Stainless Steel (Tomaloy optional)
• Major Component Material: Carbon Steel
• Bolt Material: Alloy Steel
• Number of Bolt Holes: 8
• Bolt Hole Diameter: 0.53 in.
• Angular Misalignment Capacity: 1/3° per Disc Pack
• Standard Balance: AGMA Class 7
• Lubrication Requirement: None (Maintenance-Free)
• Features: Backlash-free operation, accommodates shaft misalignment, high torsional stiffness, corrosion-resistant disc pack, suitable for high-speed applications.

Common Replacements:

• Thomas DPK DBZ 301 HHS (10028321)
• Thomas DPK DBZ 301 TOM (10028316)
• Thomas DBZ-A Size 301 Disc Coupling