Mitutoyo 1803A-10 Dial Drop Indicator 0.025 in Lug Back

Product Description

The MITUTOYO 1803A-10 is a dial drop indicator designed for precise dimensional measurement in manufacturing, machining, and quality control environments. It delivers a measurement range of 0 to 0.025 inches with a graduation of 0.0001 inches per division, providing the resolution needed for close-tolerance inspection work. The 0-5-0 balanced dial reading allows the technician to detect both positive and negative deviation from a set reference. A jeweled bearing movement supports repeatability and long service life under regular shop use. This indicator is installed by machinists, metrologists, and quality inspectors who need a compact, reliable drop-style indicator for surface, bore, or comparative gaging setups.

The 1803A-10 suits a wide range of precision measurement applications including surface plate inspection, fixture gaging, and machine tool setup on both manual and CNC equipment. The lug back mounting style allows it to attach directly to standard indicator holders and transfer gages. Its compact overall length of approximately 75.90 mm and 0.375-inch stem diameter fit common collet-style holders used in production and toolroom environments. Green limit markers are included for quick visual pass-fail reference during repetitive inspection routines.

Key Features

• 0 to 0.025 inch measurement range with 0.0001 inch graduation for close-tolerance inspection
• 0-5-0 balanced dial reading for positive and negative deviation detection from a set reference
• Jeweled bearing movement for enhanced repeatability and wear resistance
• Glare-free, scratch-resistant crystal for clear dial visibility in shop environments
• Lug back mounting for compatibility with standard indicator holders and transfer gages
• Includes green limit markers and a plastic case for storage and transport
• Revolution counter tracks total indicator travel across the 0.025-inch range

Compatibility

Designed as an OEM-style precision drop indicator meeting ANSI/AGD Group 1 standards, suitable for use with standard lug back indicator holders and fixtures common in toolroom and production inspection setups.

Installation Notes

Installation is performed by machinists, metrologists, or quality technicians using standard indicator mounting hardware. Secure the lug back to the holder before zeroing the dial against a known reference surface. Avoid side-loading the stem during setup, as lateral force can affect accuracy and bearing life. Calibrate or verify the indicator against a certified gage block set before critical inspection operations.