Fowler 52-439-032-0 1-2-3 Setup Block Matched Pair

Product Description

The FOWLER 52-439-032-0 is a matched pair of 1-2-3 setup blocks precision-ground from hardened steel for use in machining, grinding, and inspection setups. Each block measures 1 inch wide by 2 inches long by 3 inches tall, with a squareness tolerance of 0.0003 inches and parallelism held to 0.0001 inches. Hardness runs 55 to 60 HRC, providing the rigidity and wear resistance required for repeated use on surface plates and magnetic chucks. The blocks ship in a metal case and are sold as a matched pair. Machinists, toolmakers, and QC technicians rely on these for workholding, part support, and angle setups.

1-2-3 blocks are standard tooling in precision metalworking environments including job shops, production floors, and metrology labs. They support workpieces during milling, drilling, and surface grinding operations, and serve as reference datums during CMM and indicator inspection routines. The 5 tapped holes and 18 untapped holes allow clamping rods, bolts, and studs to pass through or thread in, making the blocks adaptable to a wide range of fixturing configurations. These are suited to both manual and CNC machine tool environments.

Key Features

• Squareness held to 0.0003 inches for accurate angular reference
• Parallelism tolerance of 0.0001 inches for reliable stacking and support
• 55 to 60 HRC hardened steel construction resists wear and deformation
• 5 tapped holes and 18 untapped holes for versatile fixturing and clamping
• Sold as a matched pair for balanced workholding setups
• Includes metal storage and transport case

Compatibility

Designed as standard 1-2-3 setup blocks for use on surface plates, magnetic chucks, and machine tool tables in precision machining and inspection applications.

Installation Notes

Installation is performed by machinists and toolmakers as part of workpiece setup. Clean mating surfaces before placing blocks to prevent debris from affecting accuracy. Inspect blocks periodically for burrs or nicks and stone lightly if needed to maintain flatness. Store in the included metal case when not in use to protect ground surfaces.