Cove vs Bead Router Bits: Profile Differences
By Premium CNC & Router Bits for Precision Cutting | Published: 2026-10-21
Category: Buying Guides
Compare cove and bead router bit profiles to choose the right decorative edge for your project. Learn the key differences, trade-offs, and fit guidance.
Quick answer
Choose a cove router bit when you want a concave decorative edge, and a bead router bit for a convex, rounded profile. The Whiteside 3212 combines both in one pass, while the Whiteside 3166 offers a classical cove with stepped details.
Understanding the profile difference
Cove router bits cut a concave (inward-curving) profile along the edge of your workpiece, creating a smooth, scooped look often used in molding and cabinet doors. Bead router bits produce a convex (outward-curving) rounded edge, similar to a quarter-round, that adds a soft, decorative highlight.
The cove and bead combination bit, like the Whiteside 3212, carves both shapes in a single pass, saving time on projects that need a matched concave-convex edge. A classical cove bit, such as the Whiteside 3166, adds small steps on either side of the cove for a more ornate, traditional appearance.
Trade-offs to consider
A dedicated cove bit gives you a clean, simple concave profile but requires a separate pass or a different bit if you also want a bead. A combination bit eliminates that extra step but may limit your ability to adjust the depth of each profile independently.
Shank size also matters: the Whiteside 3212 uses a 1/2" shank for stability in larger routers, while the Whiteside 3166 also uses a 1/2" shank but has a smaller overall diameter. For lighter routers or trim work, a 1/4" shank cove bit like the Whiteside 1800A offers a narrower cut and easier handling.
Trade-offs at a glance
- Combination cove and bead: The Whiteside 3212 creates both profiles in one pass. You get a clean, matched edge without changing bits, but you cannot adjust the depth of the cove and bead independently.
- Classical cove with steps: The Whiteside 3166 adds stepped details alongside the cove for a more decorative edge. It requires a separate bead bit if you also want a convex profile, but offers a unique look not possible with a plain cove bit.
- Shank size and router fit: Both the 3212 and 3166 use a 1/2" shank, which provides stability in larger routers. If your router only accepts 1/4" shanks, consider a dedicated cove bit like the Whiteside 1800A (3/16" radius) or Whiteside 1801 (3/8" radius). Check your router collet size before purchasing: a 1/4" shank bit will not work in a 1/2" collet without an adapter.
Product facts
- 1/4″ Cove & Bead Router Bit x 1/2″ Shank – Whiteside 3212 (AstraHP Coated): The Whiteside 3212 is a cove and bead combination bit that creates both a concave and a convex edge in one pass. It has a 1/2" shank, 1/4" radius, and a 5/8" cut length. This bit saves setup time when you need a matched cove-and-bead profile, making it ideal for decorative edge treatments on cabinet doors or picture frames.
1/4″ Cove & Bead Router Bit x 1/2″ Shank – Whiteside 3212 (AstraHP Coated) - 1/4″ Classical Cove Router Bit x 1/2″ Shank – Whiteside 3166: The Whiteside 3166 classical cove bit features a center cove with small steps on either side for a decorative edge. It has a 1/2" shank, 1/4" radius, and a 3/4" cutting length. The stepped design adds a traditional, ornate look that a plain cove bit cannot achieve, perfect for period-style moldings or furniture accents.
1/4″ Classical Cove Router Bit x 1/2″ Shank – Whiteside 3166
Which one fits your project?
Best for
- Woodworkers who want a matched cove and bead edge in one pass and have a router with a 1/2" collet
- Projects that need a traditional, stepped decorative edge and can accommodate a separate bead bit if needed
Not ideal for
- Light-duty trim routers that only accept 1/4" shank bits
- Jobs requiring independent depth adjustment of the cove and bead profiles
