Gibraltar BW8625-G Die Mold Sprue Bushing Series B

Product Description

The GIBRALTAR BW8625-G is a Series B die mold sprue bushing machined from steel for use in injection molding and die casting tooling applications. It features a 1-inch shank diameter and a 3-13/32-inch shank length, with a 2-inch head diameter and an overall length of 4-9/32 inches. The 7/8-inch head height, 5/32-inch hole diameter, 3/16-inch cavity depth, and 1/2-inch corner radius are engineered to precise tolerances. Licensed moldmakers, toolroom machinists, and die shop technicians install this component as part of mold base assemblies where consistent sprue formation is required.

This sprue bushing is suited for use in injection mold tooling where a standardized Series B configuration is specified. It fits into mold base bores that match the 1-inch shank diameter and accommodates typical runner and gate layouts found in production injection molds. The steel construction handles the repeated thermal cycling and clamping pressures common in both prototype and production molding environments. It is intended for installation by qualified toolmakers or moldmaking professionals working to standard mold base drawings.

Key Features

• 1-inch shank diameter and 3-13/32-inch shank length for precise mold base fitment
• 2-inch head diameter with 7/8-inch head height for secure seating at the parting line
• 5/32-inch hole diameter and 3/16-inch cavity depth for controlled sprue geometry
• 1/2-inch corner radius reduces stress concentration at the head-to-shank transition
• Steel construction withstands repeated thermal cycling and injection pressures
• Series B configuration matches widely used standard mold base layouts

Compatibility

Designed as a direct-fit replacement or new-build component for Series B standard mold bases requiring a 1-inch shank diameter sprue bushing. Verify shank diameter, shank length, head diameter, and hole diameter against the mold base print before installation.

Installation Notes

Installation should be performed by a qualified toolmaker or moldmaking technician. Before removing or installing a sprue bushing, confirm that the mold is fully cooled, the press is locked out and tagged out, and all hydraulic or pneumatic circuits are depressurized. The bushing bore in the mold plate must be clean and free of burrs to achieve proper seating and prevent flash at the sprue. Do not force the bushing into an undersized bore; verify dimensional fit with appropriate gauging before assembly.