Starrett 724LZ-30 Tubular Bow Interchangeable Anvil Outside Micrometer Set - 24-30

The Starrett 724LZ-30 is a precision tubular bow type outside micrometer set with interchangeable anvils, designed for accurate measurement of large outside dimensions in the 24 to 30 inch range. Part of Starrett's 724 Series, this instrument is built for demanding industrial and metrology applications where accuracy and ease of use are critical.

The hollow tubular frame is constructed from special steel, formed to exact design specifications and welded through a carefully controlled process. This results in a frame that delivers the lightest possible weight alongside extreme rigidity and a standard coefficient of thermal expansion — minimizing measurement error due to temperature variation. The advanced tubular bow design also provides perfect balance, a sensitive feel, and reduced measuring effort compared to conventional solid-frame micrometers.

Key Features:

• Measuring Range: 24–30 inches in 1-inch steps via interchangeable anvils
• Graduation: 0.001 inch
• Accuracy: ±0.0003 inch
• Anvil & Spindle Diameter: 0.300 inch (7.6mm) for greater balance and a larger thread bearing surface
• Anvil & Spindle Material: Steel
• Lock Nut Type: Ring-type knurled lock nut for quick and secure locking
• Sleeve: Advanced design with staggered lines and distinct figures for precise, easy readability
• Thimble: Large diameter with distinct figures for comfortable, accurate reading
• Finish: Starrett satin chrome — no-glare and rust-resistant
• Spindle: Extremely hard, stable one-piece construction
• Standards Included: 25 inch, 27 inch, and 29 inch (with insulated grips)
• Includes: Fitted carrying case and lock nut

The 724LZ-30 is ideally suited for diversified gaging applications across manufacturing, machining, and quality control environments. The set includes three precision standards (25", 27", 29") with insulated grips, and it is recommended that the micrometer be verified with standards in the approximate position — vertical or horizontal — in which it will be used.