Starrett 66863 Dial Drop Indicator 0-1 in 0.001 Grad Lug Back

Product Description

The STARRETT 66863 is a dial drop indicator with a 0 to 1 inch measurement range and a 0.001 inch graduation, designed for precision dimensional inspection work. It features a jeweled bearing mechanism for smooth, repeatable spindle travel and a white, no-glare satin-finish dial face with a 0-100 reading scale. The 2-1/4 inch (2.25 inch) dial diameter provides clear readout in shop conditions. Each revolution of the spindle covers 0.1 inch of travel, and a built-in revolution counter tracks cumulative movement. The stainless steel stem measures 0.375 inch in diameter. A NIST traceability certification is included. Machinists, tool and die workers, and quality technicians use this indicator for surface, height, and runout measurements.

The 66863 is suited for use in machine shops, maintenance facilities, and quality control environments where English-unit measurements are required. The lug back mounting style allows attachment to standard indicator holders, magnetic bases, and transfer stands. A flat back is included, offering an alternate mounting option for fixtures that require a flat seating surface. The unbreakable crystal protects the dial face in production and inspection environments without adding bulk.

Key Features

• 0 to 1 inch measurement range with 0.001 inch graduation for precise dimensional checks
• Jeweled bearing construction for smooth spindle travel and long service life
• Built-in revolution counter tracks total spindle displacement across multiple revolutions
• No-glare satin finish on white dial face reduces eye strain during extended use
• Stainless steel stem resists corrosion in shop environments
• Unbreakable crystal dial cover protects face from impact and debris
• NIST traceability certification included for quality-system compliance

Compatibility

Designed for use with standard lug-back indicator holders, magnetic base arms, and transfer fixtures that accept a 0.375 inch stem diameter. Includes a flat back for alternate mounting configurations.

Installation Notes

Mounting and setup should be performed by a qualified machinist or metrology technician familiar with indicator fixturing. Ensure the indicator stem is aligned perpendicular to the measurement surface to avoid cosine error. Do not exceed the stated measurement range, as overtravel can damage the jeweled bearing mechanism. Clean the stem and mounting lug before seating to ensure accurate, repeatable readings.