- Shaft Size: 3/8 inch. Capacity: Measures inner diameters from 5/32 inch to 4-1/4 inches, or outer diameters from 0 to 4-1/4 inches. Speed: Spindle operates at 100 RPM; exceeding this speed is not recommended. - Precision Measurement: This professional indicator is designed for accurately locating the center of a workpiece on drilling and milling machines. It effectively identifies the middle side diameter, ensuring precise alignment. - User-Friendly Design: The central measuring indicator utilizes a lever to transfer the relative position from the center of the workpiece to the display. It converts this position into a readable angle shift on the dial, providing a clear and practical tool for determining the center of machined components, including both outer diameters and inner holes. - Technical Specifications: Measurement range of 0-0.15, with a resolution of 0.0005. This co-axial centering indicator allows for quick and precise adjustments when drilling or milling on both horizontal and vertical machines. The dial indicator remains visible to the operator, facilitating easy centering. - Versatile Operation: The indicator can seamlessly transition between horizontal and vertical machines, as well as from measuring inner to outer diameters, simply by swapping the inducer—no modifications needed. The display remains stable at any desired position, allowing the operator to use both hands for accurate worktable positioning. Applications: - Ideal for machinists needing to center drill bits or milling tools accurately on various workpieces. - Perfect for precision engineering tasks where alignment is critical, such as in automotive or aerospace components. - Suitable for both hobbyists and professional machinists looking for reliable and efficient centering solutions.