Mitutoyo 2776ACAL Dial Drop Indicator 1 in Nist Calibrated

Product Description

The MITUTOYO 2776ACAL is a dial drop indicator designed for precise vertical displacement measurement on the shop floor, inspection bench, or machine setup. It covers a 1-inch total range with 0.0005-inch graduations and an accuracy of 0.002 inches, making it suitable for fine tolerance work in machining, tooling, and quality control applications. The indicator uses a jeweled bearing mechanism to extend service life and maintain consistent measuring force of 2.50 N across the full stroke. A lug back mount allows rigid fixation to a variety of indicator holders and stands. The unit ships NIST-traceable calibration certification included, meeting documentation requirements for regulated inspection environments.

This dial drop indicator is used in metrology, machine tool setup, fixture alignment, and incoming inspection across manufacturing, maintenance, and tool-room environments. The 0-50 dial reading with 0.0005-inch increments supports close-tolerance checks on machined surfaces, press fits, and runout verification. Its scratch and chemical-resistant construction suits it for production floor conditions. Licensed metrology technicians, machinists, and quality inspectors are the primary users. The lug back configuration is commonly used when mounting to a post-style holder or a surface-plate stand arm.

Key Features

• 1-inch measuring range with 0.0005-inch dial graduation for fine-tolerance inspection
• Accuracy of 0.002 inches across the full range
• Jeweled bearing mechanism for extended service life and repeatable measuring force
• Lug back mount for compatibility with standard indicator holders and post stands
• NIST-traceable calibration certificate included for regulated inspection documentation
• Scratch and chemical-resistant construction for production floor durability

Compatibility

Designed as an OEM-style drop indicator for use with standard lug-back indicator holders and surface-plate stands in shop metrology and machine tool inspection setups.

Installation Notes

Installation is performed by metrology technicians or machinists using a compatible lug-back holder or post-mount arm. Ensure the spindle axis is aligned perpendicular to the measured surface to avoid cosine error and inaccurate readings. Do not exceed the stated measuring range, as overtravel can damage the jeweled bearing mechanism. Handle the spindle and contact point with care during mounting and removal to preserve calibration integrity.