Needs 3 knitting needles compatible with KR380 knitting machine. I used https://www.amazon.de/dp/B08ZDPB1MG?psc=1&ref=ppx_yo2ov_dt_b_product_details but any similar needles should also work.

Print both halves with the flat side down as shown in the 2nd photo.

The design is parametric, many dimensions can be adjusted using the Spreadsheet in the FreeCAD model:

• The pins should fasten the two halves together tightly. Depending on your printer you may have to adjust the fitting of the pins using the “pin_clearance” value. Or use some glue if the fit is too loose.
• Designed for lace weight to sport weight yarn. For thicker weights of yarn it may be useful to increase the distance of the needles using the “needle_angle” parameter and adjust the front width using the “front_width” parameter.

Inspired by “Cordsmith” and other i-cord maker designs on the internet.