Whiteside RU2100 Spiral Upcut Router Bit – 1/4 in Dia, 1/4 in Shank, 1 in Cutting Length

Overview

The Whiteside RU2100 is a durable, solid carbide router bit designed for precise, multi-step woodwork. Built for use in a 1/4 inch collet, this upcut spiral tool features a 1/4 inch cutting diameter, a 1 inch cutting length, and a 2-1/2 inch overall length. The combination of solid carbide and an efficient cutting geometry makes it a reliable option for repeating jobs in a busy workshop.

Why the RU2100 Stands Out

• Solid carbide construction delivers rigidity and long-term consistency, helping to maintain clean edges over time.
• Upcut spiral geometry facilitates smooth finishes and rapid chip removal, especially beneficial when working deeper into a workpiece.
• The upward cutting action is designed to remove chips efficiently, reducing buildup and increasing control on deep cuts.
• Multi-purpose tooling capability supports grooves, dados, slots, pockets, and other common woodworking features with a single bit.
• Plunge-capable design supports precise starts, improved accuracy, and cleaner entry into the material.
• Material versatility includes hardwoods, softwoods, plywood, MDF, and hard plastics, making it a flexible choice for various projects.

Real-World Uses

In a typical shop, the RU2100 can be used to create tight grooves for joinery, crisp dados for shelving or cabinet components, and clean pocket recesses for decorative inlays. The 1/4 inch shank and 1/4 inch cutting diameter balance control with reach, while the 1 inch cutting length enables deeper work without sacrificing surface finish.

Material Compatibility and Performance

This bit performs well across a range of common woodworking materials, including hardwoods and softwoods, as well as plywood and MDF. The tool is designed to hold its edge through repeated use, and its upcut design helps keep the cut path clear for smoother results and easier trimming or finishing after routing.

Quality and Craft

Whiteside Machine Company has a long history of problem-solving and customer-focused tooling, dating back to 1970. The RU2100 reflects that heritage with thoughtful geometry, rigorous quality control, and ongoing development to meet the needs of woodworkers who value precision and reliability in their routing operations.

Specs at a Glance

• TOOL SPECS: Solid carbide, upcut spiral with 1/4" cutting diameter, 1/4" shank, 1" cutting length, and 2-1/2" overall length.
• APPLICABLE WITH: Routers that use a 1/4" collet.
• APPLICATIONS: Grooves, dados, slots, pockets, and other joinery features.