Gardner Spring MB1000-050-S Belleville Disc Spring

Product Description

The GARDNER SPRING MB1000-050-S is a Belleville disc spring engineered for high-load applications in compact axial spaces. Also called a conical washer spring or coned-disc spring, this component stores and releases energy along its axis, making it well suited for bolt load retention, vibration dampening, and preload maintenance in mechanical assemblies. Key dimensional specs include a 1 inch outer diameter, a 0.505 inch inner diameter, and an overall assembled height (OAH) of 0.075 inches. The spring is manufactured from stainless steel, providing corrosion resistance in wet or chemically active environments. Deflection is rated at 0.017 inches with a load of 8,113.8 pounds at full deflection. Licensed mechanics, millwrights, and maintenance technicians are the typical installers.

This disc spring is designed for use in industrial, mechanical, and trade applications where high load capacity is required in a very small footprint. The 0.505 inch inner diameter accommodates a 1/2 inch bolt, making it a direct fit for standard 1/2 inch fastener assemblies. Typical scenarios include flange bolting, valve seat loading, pump assemblies, and pressure vessel connections. The stainless steel construction makes it appropriate for plumbing, HVAC, and process piping environments where oxidation or moisture exposure is a factor.

Key Features

• High load capacity of 8,113.8 pounds at 0.017 inches of deflection in a 1 inch OD form factor
• Stainless steel construction resists corrosion in wet and chemically active environments
• Inner diameter of 0.505 inches fits standard 1/2 inch bolt sizes
• Compact OAH of 0.075 inches allows use in tight axial clearance applications
• Suitable for stacking in series or parallel to tune load and deflection characteristics

Compatibility

Designed to fit assemblies using 1/2 inch bolts, consistent with the specified 0.505 inch inner diameter. Verify outer diameter clearance and load requirements against the specific assembly before installation.

Installation Notes

Installation of Belleville disc springs should be performed by a qualified mechanic or millwright familiar with spring stacking arrangements and fastener preload specifications. Always de-energize, depressurize, or isolate the assembly before disassembly or spring replacement. When stacking multiple disc springs, confirm series versus parallel orientation per the assembly drawing, as orientation directly affects total load and deflection. Do not exceed the rated deflection, as flattening the spring beyond its design limit can cause permanent deformation or failure.