Gibraltar BW8613-G Die Mold Sprue Bushing Series B

Product Description

The GIBRALTAR BW8613-G is a Series B die mold sprue bushing machined from steel, designed for use in injection molding and die casting tooling applications. It features a 1-inch shank diameter, a 2-inch head diameter, and a 2-25/32-inch overall length, making it a standard-geometry component for guiding molten material into the mold cavity. The 5/32-inch hole diameter and 3/16-inch cavity depth are sized for controlled flow, while the 1/2-inch corner radius supports smooth material transition. Toolmakers and mold technicians install this bushing during mold assembly or maintenance to maintain precise gate alignment and repeatable shot quality.

This sprue bushing is suited for use in plastic injection molds and die casting tooling where a Series B configuration is specified. It fits into mold bases requiring a 1-inch shank with a 1-29/32-inch shank length and a 7/8-inch head height. Typical installations occur in production tooling for both prototype and high-volume manufacturing environments. Mold builders and toolroom technicians working with standard mold base configurations will find this bushing dimensionally compatible with common Series B sprue bushing pockets.

Key Features

• 1-inch shank diameter with 1-29/32-inch shank length for secure mold base seating
• 2-inch head diameter and 7/8-inch head height for positive retention against the mold plate
• 5/32-inch hole diameter sized for controlled sprue gate flow
• 3/16-inch cavity depth and 1/2-inch corner radius for smooth material transition
• Steel construction for durability under repeated injection cycles and clamping pressure
• Series B designation for compatibility with standard Series B mold base configurations

Compatibility

Designed as an OEM-style replacement or new-installation sprue bushing for mold bases requiring a Series B configuration with a 1-inch shank diameter and 2-inch head diameter.

Installation Notes

Installation is performed by qualified toolmakers or mold technicians with the mold fully removed from the press and all hydraulic and thermal systems depressurized and cooled. The bushing should be seated squarely into the sprue bushing pocket and verified for alignment with the machine nozzle before clamping. Use of appropriate press-fit or retaining methods per the mold design specification is recommended. Inspect the hole bore and seating surface for burrs or contamination before installation to ensure proper nozzle contact and prevent flash.