Gardner Spring MB1250-089 Belleville Disc Spring

Product Description

The GARDNER SPRING MB1250-089 is a Belleville disc spring - a conically shaped washer-style spring used to apply precise axial load in bolted assemblies, valve stacks, and mechanical fastening applications. It features a 1.25 inch outer diameter, a 0.63 inch inner diameter, and an overall assembled height (OAH) of 0.111 inches. Constructed from steel, this disc spring delivers 36.19 pounds of load at its rated deflection of 0.0193 inches. Industrial maintenance technicians, mechanical assemblers, and MRO professionals are the primary installers of this component.

This Belleville disc spring is suited for use in bolted joint assemblies requiring controlled spring load, vibration dampening, or thermal expansion compensation. It is sized for 5/8 inch bolt applications, making it a fit for structural, mechanical, and light industrial fastening work. These springs are commonly stacked in series or parallel to adjust load and deflection characteristics as the application demands.

Key Features

• Steel construction for durability in mechanical and industrial environments
• 1.25 inch outer diameter with 0.63 inch inner diameter for 5/8 inch bolt fitment
• Rated load of 36.19 pounds at 0.0193 inches deflection
• Low-profile OAH of 0.111 inches allows use in compact assemblies
• Can be stacked in series or parallel to tune load and travel

Compatibility

Designed for use in 5/8 inch bolt assemblies. Suitable for bolted joint, valve stack, and mechanical fastening applications requiring a 1.25 inch OD Belleville disc spring.

Installation Notes

Installation is typically performed by mechanical technicians or MRO personnel. Ensure the mating surfaces are clean and free of burrs before seating the spring. When stacking multiple disc springs, confirm the load-deflection curve matches the assembly specification. Do not exceed the rated deflection to avoid permanent set or spring failure.