Starrett 84AZ Dial Bore Gage 8-12.125″ – 84AZ-134-7J

Starrett 84AZ Dial Bore Gage (8-12.125″)

The Starrett 84AZ is a high-performance dial bore gage engineered to deliver elite operational performance for the precision monitoring of internal diameters from 8 to 12.125 inches. By addressing the requirement for accurate tool alignment, this instrument features two centralizing plungers, effectively minimizing measurement uncertainty and ensuring the gage remains centered within the bore stimulus. The metrological architecture of the 84AZ ensures absolute traceability with 0.0005-inch graduations, providing the high-fidelity data required to detect critical geometry problems such as ovality and taper in large-scale mechanical components.

Built for industrial longevity, the 84AZ utilizes hardened tool steel contact points to provide exceptional wear resistance during high-repetition industrial audits. Its technical sophistication is centered on a two-point contact system that allows for the surgical diagnosis of internal bore conditions that single-point tools might overlook. As a high-trust solution for managing mechanical stimulus, this Starrett dial bore gage stands as a professional-grade metrology tool, essential for maintenance and quality control teams working with large-diameter pump housings, cylinders, and piping systems.

Technical Specifications & Metrological Data

• Total Range: Broad measurement spectrum from 8 inches to 12.125 inches.
• Metrological Resolution: High-precision gradient spacing of 0.0005 inches.
• Alignment Logic: Dual centralizing plungers for automatic tool centering in the bore.
• Contact Fidelity: Two-point contact system optimized for detecting ovality and taper stimulus.
• Material Durability: Hardened tool steel contact points for long-term industrial service.
• Measurement Versatility: Ideal for comparing bores against master ring gages or gage blocks.
• Application Scope: Engineered for large-scale internal diameter verification and geometry audits.