● Woodworking · Review

Bosch 85471M 1/4 In. x 1/2 In. Carbide Tipped Plunge Roundover Bit

Plunge-cut capability allows roundovers on inside corners that a standard bearing-guided bit cannot reach

✎ PickHonest Research Desk▦ Updated May 18, 2026◷ 3 min read

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Bosch 85471M 1/4 In. x 1/2 In. Carbide Tipped Plunge Roundover Bit
Best Plunge

Bosch 85471M 1/4 In. x 1/2 In. Carbide Tipped Plunge Roundover Bit

Bosch

Plunge-cut capability allows roundovers on inside corners that a standard bearing-guided bit cannot reach

  • Roundover with flat bottom
  • Can be plunged into a surface
  • Produces roundover on inside corners
  • Carbide-tipped

Pros

  • Plunge-cut capability allows roundovers on inside corners that a standard bearing-guided bit cannot reach
  • Produces consistent roundover on curved cutouts, holes, and inside routed profiles
  • Premium micro-gra in carbide construction for maximum edge retention
  • Fills the gap w here a bearing-guided roundover cannot reach

Cons

  • More expensive than standard bearing-guided roundover bits
  • Requires plunge router -- cannot be used in a router table without modification
  • Specialized application -- most woodworkers do not need this regularly
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