Spi 91-305-3 V-block Set 1.5 in 90 Degree with Clamp

Product Description

The SPI 91-305-3 is a precision V-block set designed for holding and inspecting cylindrical workpieces during machining, grinding, or metrology operations. The set includes a matched V-block and clamp, allowing secure fixturing of round stock up to 1.5 inches in diameter. The V-groove is ground to a 90-degree included angle and holds a V parallelism tolerance of 0.0005 inches, making it suitable for precision layout and inspection work in machine shops and tool rooms. Overall height is 1.25 inches. This set is non-magnetic and suited for use on surface plates or machine tables where magnetic chucks are not appropriate.

This V-block set is used in manufacturing and inspection environments where repeatable, accurate workholding is required. Typical applications include cylindrical part layout, roundness checks, shaft alignment, and inspection setups. The included clamp secures the workpiece in the V-groove without additional fixturing hardware. The 90-degree V angle accommodates a wide range of round stock diameters within the rated capacity. Machine shop technicians, tool and die makers, and quality control inspectors are the primary users of this type of tooling.

Key Features

• 90-degree V angle for secure, repeatable cylindrical workpiece location
• Maximum V capacity of 1.5 inches diameter
• V parallelism tolerance of 0.0005 inches for precision inspection use
• Squareness tolerance of 0.0005 inches
• Includes matching clamp for workpiece retention
• Non-magnetic construction suitable for non-ferrous or sensitive workpieces

Compatibility

Designed as a standard V-block set for use in general machining, toolroom, and metrology applications requiring cylindrical workpiece fixturing up to 1.5 inches in diameter.

Installation Notes

Place the V-block on a clean, flat surface plate or machine table before seating the workpiece. Ensure the clamp is tightened evenly to avoid deflecting the part during inspection or layout operations. No power source is required for this tooling. Follow standard metrology and shop safety practices when handling precision ground components to avoid damage to the ground surfaces.