Value Collection SC05878939 Type J Tool Holder Bushing

Product Description

The VALUE COLLECTION SC05878939 is a Type J rotary tool holder bushing designed for use in drill jigs and tooling fixtures that require precise hole location and guided cutting tool support. With a 0.250 inch inside diameter and a 0.750 inch outside diameter, this bushing accepts standard 1/4 inch tooling shanks while press-fitting into a 3/4 inch bore. The head thickness measures 0.190 inches (3/16 inch nominal) and the length under head is 1.500 inches, providing ample engagement depth for stable tool guidance. Machinists and toolroom technicians install this bushing type in production and maintenance environments where repeatable hole alignment is critical.

Type J tool holder bushings are used in drill jig assemblies, machining fixtures, and rotary tool setups found in industrial production, maintenance shops, and fabrication environments. The head seats flush against the jig plate surface to prevent the bushing from being pushed through under cutting load. The 13/16 inch distance between hole centers is a key layout dimension when spacing multiple bushings in a common fixture plate. This part is suitable for both new fixture builds and replacement applications.

Key Features

• Type J bushing geometry with integral head for positive axial retention in the jig plate
• 0.250 inch inside diameter for 1/4 inch tooling shank guidance
• 0.750 inch outside diameter for press fit into standard 3/4 inch bore
• 1.500 inch length under head provides stable tool support across thick fixture plates
• 0.190 inch head thickness seats securely against the jig surface
• 13/16 inch hole center distance for multi-bushing fixture layout reference

Compatibility

Designed as a standard Type J rotary tool holder bushing for use in drill jigs and machining fixtures requiring a 1/4 inch inside diameter and 3/4 inch outside diameter bushing with a headed retention style.

Installation Notes

Tool holder bushings are installed and replaced by machinists and toolroom personnel. Power down and de-energize all associated machinery before removing or installing a bushing. A press or arbor press is typically used to seat or extract the bushing without damaging the bore or head. Inspect the receiving bore for wear or damage before pressing in a replacement bushing to ensure proper fit and alignment.