Gibraltar 635055-G Steel Shoulder Pin Liner

Product Description

The GIBRALTAR 635055-G is a steel shoulder pin liner designed to provide precise bore alignment and wear protection in jig and fixture applications. With an inside diameter range of 0.3126 to 0.3129 inches and an outside diameter range of 0.5014 to 0.5017 inches, this liner delivers tight dimensional tolerances critical for accurate drill guidance and locating. The 5/8-inch shoulder diameter seats the liner flush against the workpiece or tooling plate, while the 3/32-inch shoulder height controls seating depth. At 1/2 inch in overall length, it is suited for compact fixture setups requiring a low-profile liner. Machinists, toolmakers, and fixture builders are the primary installers of this component.

This shoulder pin liner is used in drill jigs, assembly fixtures, and production tooling across manufacturing and machine shop environments. The shouldered design allows it to rest positively on a mating surface without pressing fully through, making it appropriate for applications where controlled liner depth is required. It is sold individually and is appropriate for both new fixture builds and replacement of worn liners in existing tooling setups.

Key Features

• Inside diameter range of 0.3126 to 0.3129 inches for precise drill or pin guidance
• Outside diameter range of 0.5014 to 0.5017 inches for consistent press or slip fit in tooling plate bores
• 5/8-inch shoulder diameter provides positive seating surface against fixture plate
• 3/32-inch shoulder height controls liner seating depth
• Steel construction for durability and wear resistance in repetitive production use
• Compact 1/2-inch overall length suits low-profile fixture applications

Compatibility

Designed as a standard shoulder pin liner for use in drill jigs and machining fixtures requiring a 0.3126 to 0.3129-inch bore liner with a 5/8-inch shoulder diameter.

Installation Notes

Installation is typically performed by a toolmaker or machinist during fixture assembly or liner replacement. Ensure the mating bore in the tooling plate is clean and dimensionally correct before installing the liner to avoid damage to the bore or the liner shoulder. Press-fit installations should use an arbor press and appropriate driver to avoid distorting the liner. Verify liner seating is flush and square to the fixture surface before returning the fixture to service.