In this detailed tutorial, we guide you through the process of making a zig-zag oil groove cutting tool on a lathe, a must-have accessory for precision machining. Zig-zag oil grooves are essential for ...

Meaning that because corners are so important for how we process visual information, when a curved line appears to be on the cusp of smooth versus zig-zag, we’ll err on the side of zig-zag ...