CNC & Router Bits

Basic questions typically cover what materials the machine can cut, what design software is required, and the differences between 3-axis and 5-axis models. Other common inquiries focus on how to properly secure the workpiece and what routine maintenance is needed for optimal performance.

While often used interchangeably, CNC bits are specifically engineered with specialized spiral geometries to withstand the intense speeds, automated plunging, and heavy lateral forces of machine production, whereas standard router bits are primarily designed for edge profiling with handheld tools.

A high-quality CNC router bit typically lasts between 50 and 100 hours of continuous cutting time, depending heavily on the material hardness, feed rates, and whether it is solid carbide or high-speed steel.

You should always choose 1/2-inch shank router bits whenever your router or CNC collet supports them, as the thicker shaft provides significantly more rigidity and surface contact, drastically reducing vibration, chatter, and heat buildup for cleaner cuts and longer bit life compared to 1/4-inch shanks.

A straight spiral upcut bit or a dedicated slot-cutting router bit (like the Freud Three-Wing Slotting Cutter is best for cutting clean, accurate notches, dados, and rabbets because the shear design clears out wood chips efficiently while leaving smooth, square shoulders.