Spi 63-395-8 V-block Matched Pair 2-7/16 Inch Cast Iron

Product Description

The SPI 63-395-8 is a matched pair of cast iron V-blocks designed for precision workholding, inspection, and layout work in machine shops and tool rooms. Each block features a 90-degree V angle with a maximum V capacity of 2-7/16 inches, making it suitable for supporting round stock, shafts, and cylindrical workpieces during grinding, milling, inspection, or scribing operations. V parallelism is held to 0.0002 inches, and V accuracy is 0.0002 inches, meeting the demands of close-tolerance inspection and setup work. The blocks are sold as a matched pair and are typically used together to provide two-point support of a workpiece along a common axis.

These V-blocks are intended for use on surface plates, magnetic chucks, or machine tool tables in precision metalworking environments. Typical users include machinists, tool and die makers, quality control technicians, and metrology professionals. The cast iron construction provides stability and resistance to wear under repeated use. At 5 inches overall length, 2 inches overall width, and 3-1/8 inches overall height, the pair suits a range of medium-diameter workpiece support applications commonly encountered in general machining and inspection setups.

Key Features

• Matched pair — both blocks are inspected and matched for consistent performance
• 90-degree V angle accommodates round stock and cylindrical parts up to 2-7/16 inches in diameter
• V parallelism of 0.0002 inches for high-accuracy workholding and inspection
• V accuracy of 0.0002 inches supports close-tolerance layout and measurement tasks
• Cast iron construction provides rigidity, vibration damping, and long service life
• Non-magnetic — suitable for use where magnetic influence must be avoided

Compatibility

Designed as a general-purpose matched V-block pair for use on surface plates, inspection tables, and machine tool setups requiring support of cylindrical workpieces up to 2-7/16 inches in diameter.

Installation Notes

V-blocks are typically set up by machinists or metrology technicians on a clean, flat reference surface such as a granite or cast iron surface plate. Ensure the surface plate and V-block bases are free of chips, burrs, and debris before placing the blocks to avoid measurement error or workpiece damage. When used for inspection or layout, confirm both blocks of the matched pair are oriented consistently per the manufacturer marking. No power source or special tools are required for basic setup, but securing clamps or straps are recommended when the workpiece will be rotated or subjected to cutting forces.