Starrett 84AZ-111-6J Dial Bore Gage 5-8" Range .0001" Graduation 84A Series

The Starrett 84AZ-111-6J is a precision dial bore gage from the 84A Series, designed for accurate internal diameter measurement in larger bores with a 5" to 8" measurement range and ultra-fine .0001" graduations. Built for demanding inspection environments, this gage delivers repeatable, reliable readings where tight tolerances are critical.

This is a comparison-style gage and must be zeroed against a reference standard such as a master ring gage, gage blocks with parallel jaws, an outside micrometer, or a vernier caliper before use. Best practice is to set the gage to zero as close to the target dimension as possible for maximum accuracy.

Key Specifications:

• Measurement Range: 5" – 8" (5" – 8-1/8" actual)
• Graduations: .0001"
• Maximum Bore Depth: 6"
• Plunger Travel: .030"
• Accuracy: ±.0002"
• Repeatability: .0001"
• Contact Style: Three-point
• Includes: (4) Extensions and protective wooden case
• Country of Origin: United States

Key Features:

• Adjustable range screw and two centralizing plungers provide accurate three-point contact for precise tool alignment in larger bores
• All contacts and centralizing plungers are hardened tool steel and spring-loaded for long wear life and measurement sensitivity
• Lightweight aluminum housing and knurled handle for comfortable, well-balanced use
• Jewel-bearing dial indicator for smooth, sensitive needle movement
• Can be easily used to inspect bores and hole sizes without removing the workpiece from the machine
• Available with optional carbide contacts or electronic indicators with output capability (special order)

The Starrett 84A Series dial bore gage is ideal for machinists, quality control inspectors, and tool rooms requiring precise bore measurement in medium-to-large diameter applications. Backed by Starrett's reputation for American-made precision metrology tools.