Fidget Gear Pen (Pilot G2)

Experience a clean and modern 3D-printed pen designed specifically for the PILOT BLS-G2-7 gel refill. Its engineering-inspired design features a decorative gear pattern and a sturdy two-part body that simply screws together. One of the first things you’ll notice is the pen’s solid, substantial feel. This isn’t only about long-term reliability — the larger diameter naturally provides a more comfortable and secure grip. All parts are designed to print easily without the need for supports. I recommend using a 0.4 × 4 × 20 mm pen spring, which is commonly used for this type of refill. I personally prefer a 0.5 × 6 × 22 mm spring, as it provides a slightly more premium feel. The upper part contains the push button and cam, forming a classic and reliable click mechanism. During assembly, lightly lubricate the push button and cam, leave the pen body loosened by about half a turn, and click the mechanism several times to let the parts settle properly. The cam must be oriented correctly so it c