R10 Rounding Cutter with Guide Bearing

The RUWI R10 rounding router bit rounds off wood edges with a 10-mm radius—a substantial, well-defined curve just under the quarter-round dimension. The lead ball bearing (Ø 12.7 mm) runs along the edge of the workpiece and guides the bit even along curved contours for which no stop fits.

The router bit is double-edged and carbide-tipped (HW, Z2), right-hand rotation, with a diameter of 33 mm tool diameter and 16 mm working length; shank with a diameter of 8 mm, overall length 63 mm. It cuts softwood, hardwood, and laminated panels. If the ball bearing wears out, you can replace it—instead of replacing the entire router bit.

Here's how to use it

• Rounding table tops and stair treads: a 10-radius rounding takes the sharpness off the edge and softens the profile—creating a bold look without visually halving the thickness of the slab.
• Shaping grip strips and handrails: two passes from both sides create the rounded grip surface.
• Milling curved contours: The guide bearing follows the curve—the stop remains folded away.
• Batch processing on the table: On the “ router table ,” you guide the workpiece past the stationary milling cutter—edge by edge, with the same profile.

Does this fit your router?

The shank requires an collet with a diameter of 8 mm. Given this diameter and radius, the cutter should be used in the router table —at a reduced speed, which is safer and smoother than freehand cutting; the stepless adjustment of the RUWI router tables adjusts it appropriately. It also runs on CNC machines.

The R12.7 (quarter-round) provides an even more pronounced rounding, while radii R2 through R8 offer a more subtle finish—the entire series provides an overview of RUWI ’s milling tools.

All the details

Profile
Radius: 10 mm
tool diameter : Ø 33 mm
working length : 16 mm
overall length : 63 mm

shank and thrust bearing
shank : Ø 8 mm, shaft length 32 mm
Thrust bearing: Ball bearing Ø 12.7 mm, replaceable

Cutting edges and insert
Cutting edges: Z2, carbide (HW), clockwise rotation
Materials: Softwood, hardwood, coated panels
collet : Ø 8 mm required
net weight : approx. 55 g