Jacobs 30613 Ball Bearing Set Chuck No. 80

Product Description

The JACOBS 30613 is a replacement ball bearing set designed for use with keyless precision drill chucks. This set provides the internal bearing components needed to restore smooth, precise chuck operation in keyless drill chuck assemblies. Compatible with Chuck No. 80, it delivers an OEM-style fit for technicians and machinists performing chuck maintenance or rebuild work. Installation requires disassembly of the chuck body, making this a part for skilled trades professionals and toolroom mechanics comfortable working with precision tooling components.

This ball bearing set is intended for use in keyless precision drill chuck applications where the original bearing components have worn, corroded, or failed. Keyless precision drill chucks are common on drill presses, CNC machines, and hand drills used in metalworking, machining, and industrial maintenance environments. Restoring the bearing set extends chuck service life and maintains runout accuracy critical to precision drilling operations.

Key Features

• Replacement ball bearing set for keyless precision drill chucks
• Compatible with Chuck No. 80 and Model No. BB-80
• OEM-style fit for accurate chuck rebuild and maintenance
• Sold as a single package quantity suitable for one chuck service

Compatibility

Designed for use with JACOBS keyless precision drill chucks bearing Chuck No. 80 compatibility designation, model BB-80.

Installation Notes

Installation of this ball bearing set requires full disassembly of the drill chuck body and should be performed by a qualified machinist or toolroom technician familiar with precision chuck components. Ensure the host machine is fully powered down and isolated before removing the chuck from the spindle. Handle bearing components with clean, dry hands or lint-free gloves to avoid contamination that could affect bearing performance and longevity. Consult the chuck manufacturer service documentation for proper reassembly sequence and any applicable torque or preload guidance specific to your chuck model.