The coaxial dial indicator with a central display is an essential precision tool designed for accurately locating the center of your workpiece. Utilizing a lever mechanism, it translates the relative position of the workpiece center into an angular displacement of the needle, offering a clear and visible reading. Key Benefits: - Accurate Measurement: Quickly find the relative center of processed workpieces, including both inner holes and outer diameters, ensuring precision in your machining tasks. - User-Friendly Design: The indicator can be easily operated with both hands free, allowing for precise adjustments while the spindle rotates, enhancing workflow efficiency. Specifications: - Mounting Shaft: 3/8 inch - Capacity: Suitable for measuring inner diameters from 5/32 to 4-1/4 inches and outer diameters from 0 to 4-1/4 inches. - Speed: The spindle rotates at 100 RPM; exceeding this speed is not recommended. - Measurement Range: 0 to 0.15 inches with a resolution of 0.0005 inches. Versatile Applications: - Ideal for aligning workpieces on drilling or milling machines, ensuring accurate centering for various machining operations. - Easily transitions between horizontal and vertical machines, as well as from inside to outside diameter measurements, by simply replacing the indicator without the need for adjustments. This professional-grade coaxial indicator is built for reliability and precision, making it an invaluable addition to any machinist's toolkit. Experience enhanced accuracy and efficiency in your machining processes with this specialized measuring instrument.