Inside Calipers (180 mm range)

A simple and useful 3D printed tool for measuring internal dimensions – perfect for pipes, holes, grooves, and cavities.The calipers consist of two printed arms and a friction knob, assembled using a standard M6x30 mm screw and M6 hex nut. The screw provides enough tension to hold the arms in place after adjustment.🔩 Hardware needed:– 1x M6x30 mm screw– 1x M6 hex nut📏 Max opening: approx. 180 mm🧱 Supports: Not required🖨️ Recommended materials: PLA or PETG⚙️ Print orientation: Flat on the build plate🛠️ Assembly: Insert the hex nut into the knob, align the arms, and screw everything together.Ideal for hobbyists, makers, or workshop users who need a quick way to measure internal sizes.