Whiteside RU5125CB — Chipbreaker Up Cut Spiral, 1/2" Shank, 1/2" Dia, 1-1/4" CL, 3" OAL.
- Shank: 1/2"
- Cutting Diameter: 1/2"
- Cutting Length: 1-1/4"
- Overall Length: 3"
- Profile: Up Cut
Materials: Natural woods, composites
Recommended RPM: 16,000-18,000 (max 24,000)
Each flute has small serrations to tear up the chips as the bit is cutting through the project. This bit has a feed rate in-between that of a roughing bit and a standard spiral router bit. Up cut spiral design provides the best control with hand or table routing pulling the chips up and away from the work material.
- TOOL SPECS: Solid carbide, up cut, chipbreaker spiral with 1/2″ cutting diameter, 1/2″ shank, 1-1/4″ cutting length, and 3″ overall length for use in routers with a 1/2″ collet.
- UP CUT SPIRAL: Ideal for smooth finishes and rapid chip removal. Up cut spirals create a clean edge on the side of the material that is farthest from the router.
- CHIPBREAKERS: These spirals have brief interruptions along the cutting edge which allow for stringy materials to be cut into chips without wrapping around the bit or sacrificing cut quality.
- HELIX: The upward cutting action removes chips efficiently, especially in deep cuts. The spiral helix ensures clean, crisp cuts while outperforming standard straight bits.
- MATERIALS: Performs best with hardwoods, softwoods, plywood, MDF, and hard plastics for versatile woodworking applications.
- MACHINES: Designed for hand-held routers, router tables, and CNC machines in a wide variety of applications.
Whiteside catalog page 5.


