Gardner Spring MB4000-125 Belleville Disc Spring

Product Description

The GARDNER SPRING MB4000-125 is a Belleville disc spring designed to deliver high load capacity in a compact axial profile. This conical washer-style spring produces a controlled compressive load through deflection, making it well suited for bolt preload applications, valve assemblies, and precision clamping systems where space is limited. The MB4000-125 features a 4 inch outer diameter, a 2 inch inner diameter, and an overall assembled height of 0.25 inches. It is rated to deliver a load of 8,164.84 pounds at a deflection of 0.0192 inches. Installation is typically performed by mechanical contractors, maintenance technicians, or precision assembly professionals working with bolted flanges or spring-loaded mechanical assemblies.

This disc spring is used in industrial and mechanical applications requiring repeatable axial load under compression. Typical applications include bolted flange connections, pipe and pressure vessel assemblies, clutch packs, and industrial valve actuators. The 2 inch bolt size attribute makes it appropriate for heavy-duty fastener preload scenarios where maintaining consistent clamp load over time is critical. It is suitable for both original equipment builds and field replacement in maintenance and repair operations.

Key Features

• 4 inch outer diameter and 2 inch inner diameter for use with 2 inch bolt configurations
• High load rating of 8,164.84 pounds at 0.0192 inches of deflection
• Low-profile design at 0.25 inches overall height enables stacking and space-constrained installations
• Steel construction provides durability under repeated compression cycles
• Consistent conical geometry delivers predictable spring rate for precision load control

Compatibility

Designed as an OEM-style Belleville disc spring for mechanical assemblies requiring a 4 inch outer diameter, 2 inch inner diameter conical washer spring with a 2 inch bolt size fitment.

Installation Notes

Belleville disc springs are installed by mechanical technicians or maintenance professionals. De-energize and depressurize the system before disassembly. Springs may be stacked in parallel to increase load capacity or in series to increase deflection range - verify stacking orientation against the original design specification. Follow applicable mechanical and pressure vessel codes when used in pressurized flange assemblies.