Spi 20-910-6 Drop Indicator Spindle Square

Product Description

The SPI 20-910-6 is a drop indicator spindle square designed for use with dial and digital drop indicators in machine shop and metrology applications. The spindle square allows an indicator to be positioned at a precise right angle to a spindle or quill, enabling accurate perpendicularity checks and setup verification on milling machines, drill presses, and similar equipment. The shank diameter measures 0.38 inches for a secure fit in standard tool holders, and the graduation resolution is 0.001 inches, supporting precision work where tight tolerances are required. Licensed machinists, toolroom technicians, and metrologists are the primary users of this accessory.

This spindle square is suited for machine tool setup in both production and toolroom environments. It is used when a technician needs to verify that a spindle or quill is running true and perpendicular to the table surface before beginning a machining operation. The accessory accommodates all machine types as specified by the manufacturer, making it a versatile addition to a shop's indicator tooling inventory. It ships as a single unit.

Key Features

• 0.38 inch shank diameter for compatibility with standard collets and tool holders
• 0.001 inch graduation resolution for precision perpendicularity measurement
• Drop indicator mounting style allows quick attachment and removal
• Suitable for use with all machine types as rated by the manufacturer
• UNSPSC Code 41111600 for procurement and cataloging systems

Compatibility

Designed for use with all machines as specified by the manufacturer, compatible with dial and digital drop indicators that accept a standard spindle square accessory.

Installation Notes

Installation is performed by machinists or toolroom technicians. Before mounting the spindle square, power down the machine and ensure the spindle is locked or at rest. Insert the shank into the appropriate collet or holder and tighten securely per the machine manufacturer's recommended clamping procedure. Handle indicator accessories with care to avoid impacts that could affect calibration accuracy.