Solid Carbide Spiral Top Bearing

A top bearing sits above the cutter and rides along a template placed on the upper surface of the workpiece. This allows the template to be clamped on top while the router bit trims the workpiece edge to match the template shape.

A top-bearing bit is better when the template is clamped to the top of the workpiece and the underside of the work is not easily visible or accessible. It is the preferred setup for most router table pattern routing, where the template sits face-up on the table.

Compression spiral geometry combines upcut and downcut flutes to prevent chip-out on both the top and bottom faces of the workpiece. This is essential when routing veneer plywood, melamine-coated sheet goods, or any laminated material where both surfaces must remain clean.

Yes, though router table use with a starting pin offers more control when entering the cut. For freehand plunge routing with a template, secure the template firmly to the workpiece and take light passes to maintain control.

The 2-inch cutter height version provides enough reach for standard cabinet plywood thicknesses. For thinner sheet goods or MDF, shorter cutter heights reduce deflection and improve cut quality.

Solid carbide maintains a sharper cutting edge and offers greater rigidity at smaller diameters, which is especially important in pattern bits where deflection affects accuracy. For production use or hard materials, solid carbide is the better choice.

Templates are typically made from MDF, Baltic birch plywood, or hardboard. Shape the template precisely using a band saw, jigsaw, or oscillating sander, then refine the edge with files or sandpaper. The Infinity Tools Learning Center covers template-making techniques in detail.

Yes. The 2-piece set includes both the 1/4-inch and 1/2-inch shank versions, so you have the right bit for full-size routers and trim routers without buying each separately.

Yes. All Infinity Tools solid carbide bits are backed by the Infinity Tools quality guarantee. Visit the page for full coverage details.

Larger cutter diameters require lower spindle speeds to maintain safe tip velocity. Consult the bit manufacturer's speed chart and reduce RPM for bits over 1/2-inch cutting diameter. Additional guidance is available at the Infinity Tools Learning Center.