Spi 40-245-3 Optical Comparator Chart Reticle 10x

Product Description

The SPI 40-245-3 is an optical comparator chart and reticle designed for use with 10x magnification optical comparators. It measures 1.375 inches in diameter, making it a standard-size replacement or spare reticle for bench-top and floor-standing comparator systems. Optical comparator reticles serve as the reference overlay inside the eyepiece or projector stage, allowing machinists and quality control technicians to compare part profiles against scribed or printed reference lines. The 40-245-3 is a single-unit item suited for precision inspection workflows where accurate part measurement and profile comparison are required.

This reticle is used in industrial metrology and quality inspection environments, typically found in machine shops, tool rooms, and manufacturing facilities. It is installed in the eyepiece or reticle stage of an optical comparator operating at 10x magnification. Technicians use these charts to verify part geometry, thread profiles, radii, and angular features against known reference lines without contact measurement. It is appropriate for both production-floor inspection and tool and die inspection applications.

Key Features

• Designed for 10x magnification optical comparators
• 1.375-inch overall diameter for standard comparator eyepiece fitment
• Single-unit packaging suitable for direct replacement or spare inventory
• Supports non-contact profile and geometry inspection
• Applicable to thread, radius, and angular feature verification tasks

Compatibility

Designed for use with optical comparators operating at 10x magnification that accept a 1.375-inch diameter reticle or chart insert.

Installation Notes

Reticle installation is typically performed by a metrology technician or qualified machinist. Before replacing a reticle, power down the comparator and allow the light source to cool fully. Handle the reticle only by its edges to avoid contaminating the optical surface. Consult the comparator manufacturer's service documentation for proper seating and alignment procedures specific to the instrument.