Overview
The Mason 4C989A vibration isolator is a double-deflection neoprene mount designed for floor installation beneath machinery and equipment. Rated for 300–600 lb capacity with 0.25–0.50 inch deflection, this isolator reduces structurally transmitted noise and vibration. The neoprene construction with integrated steel baseplate delivers durability while the friction surface minimizes bolting requirements in many installations.
Key Features
- Yellow color marking for identification and load rating
- Double deflection neoprene mount design for superior vibration dampening
- Neoprene-coated steel construction prevents corrosion and provides non-skid surface
- Includes top bolts and washers for mounting
- Base includes two bolt holes for floor or base surface mounting
- New condition, no box – tested and ready to deploy
Technical Specifications
- Part Number: 4C989A
- Capacity Range: 300–600 lb
- Deflection: 0.25–0.50 inches
- Height: 1 7/8 inches
- Width: 2 5/16 inches
- Isolator Type: Neoprene
- Cap Screw: 3/8 x 1 inch
- Color Mark: Yellow
- Mounting: Floor/Base Mount
- Quantity: 1 Unit
Typical Applications
Mason Industries vibration isolators are used for isolating fans, motors, pumps, punch presses, compressors, air handling equipment, and other vibrating machinery. The 4C989A yellow rating is suited for medium-load equipment in manufacturing, HVAC, and mechanical utility applications where transmitted vibration and noise reduction is essential.
Compatibility & Replacements
Compatible With
- Concrete and steel floor structures
- Industrial machinery bases and sub-frames
- Equipment requiring 300–600 lb load support per isolator point
- Standard floor mount bracket systems
Replaces / Drop-In Replacement For
The Mason 4C989A is a standard production model from Mason Industries’ yellow-rated isolator series. Direct replacement capabilities depend on exact load requirements and existing mounting hole configurations. Verify specifications with your equipment documentation or contact Mason Industries for drop-in compatibility with legacy equipment.
Works With
- Mason Industries isolation systems and sub-bases
- Standard 3/8-inch bolt and cap screw fastening
- HVAC vibration isolation frameworks
- Industrial machinery mounting standards (ANSI, NFPA)
