Gibraltar 646450-G Press Fit Rest Button Ground Steel

Product Description

The GIBRALTAR 646450-G is a press fit rest button designed for precision machine and fixture applications. Constructed from low carbon steel with a black oxide coating, this button provides a hardened, ground seating surface for workpiece support and location. The ground press fit design ensures accurate, repeatable positioning when pressed into a mating bore. It measures 27/32 inches in overall length with a 5/8 inch outside diameter, a 3/8 inch head height, and a pin diameter of 0.3760 inches. Machinists, toolmakers, and fixture builders install this type of component during machine setup and workholding fabrication.

Press fit rest buttons are used in jigs, fixtures, and workholding assemblies where a stable, precise contact point is required to support or locate a workpiece. The ground surface finish ensures minimal runout and consistent contact. This button is suited for use in both production machining environments and toolroom applications where dimensional repeatability is critical. It installs directly into a pre-bored hole in a fixture plate or body.

Key Features

• Ground press fit design for accurate, repeatable seating in fixture bores
• Low carbon steel construction for toughness in workholding applications
• Black oxide coating for corrosion resistance and reduced light reflection
• 0.3760 inch pin diameter for precise bore fit
• Compact head profile at 3/8 inch head height for low-clearance fixture designs

Compatibility

Designed as a standard press fit rest button for use in machinist jigs, fixtures, and workholding plates requiring a ground locating or support surface.

Installation Notes

Installation is performed by toolmakers or machinists using a press or arbor press to drive the pin into a precision-bored hole. Ensure the receiving bore is machined to the appropriate tolerance for a press fit before installation. Pressing the button in by hand or hammer is not recommended, as it may damage the ground surface or misalign the button. Follow standard workholding and fixture design practices when specifying bore depth and fit class.