Quick Answer

Choose a round nose bit with a radius that matches the desired groove or edge depth. For sign making or juice grooves, a 1/2" radius bit like the Whiteside 1413 is a solid starting point. Match the shank size to your router's collet and the cut length to your material thickness.

Radius vs. Cutting Diameter

Round nose bits are defined by their radius, not the full cutting diameter. A 1/2" radius means a 1" cutting diameter, which creates a groove 1/2" deep. If you need a shallower groove, a smaller radius bit is better; for deeper profiles, go larger.

Shank Size and Router Compatibility

Most round nose bits come with 1/4" or 1/2" shanks. A 1/2" shank is stiffer and reduces vibration, especially in larger bits. Check your router's collet capacity before buying. The Whiteside 1413 has a 1/2" shank, which is standard for heavy-duty work.

Cut Length and Material Thickness

The cut length determines the maximum depth of cut. For a 1-1/4" cut length, you can safely rout a groove up to about 1" deep in multiple passes. Match this to your material thickness; for thicker stock, look for bits with longer cut lengths.

How to Choose the Right Round Nose Bit

  • Profile Depth Required: Measure the desired groove or edge depth. The radius of the bit determines this. For a 1/4" deep groove, choose a 1/4" radius bit. For 1/2" depth, a 1/2" radius bit like the Whiteside 1413 works.
  • Shank Size: Use a 1/2" shank for bits over 1" diameter to reduce chatter. For smaller bits, 1/4" shanks are fine. Always confirm your router collet size.
  • Material and Passes: Softer woods like pine can take deeper passes, but hardwoods require multiple shallow passes. Never exceed the bit's cut length in one pass. For deep grooves in hardwood, make 3-4 passes at increasing depth.

Product Facts

  • 1″ Round Nose Router Bit – Whiteside 1413: 1 inch round nose router bit with 1/2" shank, 1/2" radius, 1-1/4" cut length, and 2-7/8" overall length. Recommended RPM: 14,000. Made in USA. This bit is ideal for sign making and juice grooves, offering a consistent radius and a robust 1/2" shank for stable cuts in hardwoods.

    1″ Round Nose Router Bit – Whiteside 1413

    1″ Round Nose Router Bit – Whiteside 1413

Who Should Buy This

Best For

  • Sign makers who need consistent juice grooves
  • Woodworkers routing shallow decorative flutes in panels
  • DIYers making edge profiles on medium-density fiberboard

Not For

  • Users needing a sharp V-groove for lettering; use a V-bit instead