Wood Router Bits

Wood Router Bits

Choose a flush trim bit by bearing position

Find the reference surface first and compare the bearing and cutter diameters for the exact tool.

Decide which edge the pilot will touch

A pilot bearing needs a continuous reference edge. Choose the model with a bearing at the usable end of the cutter once you know where the reference will sit relative to the stock.

Read double bearing carefully

A double guide at the tip uses two bearings at the same end. A dual-ended cutter has a bearing on each end. These layouts give different choices for where to place the template.

Match cutting height and inside radius

Compare the cutting section with the material height and note the diameter of the cutter for inside curves. A tighter turn may require a smaller diameter even when the collet accepts a larger one.

Source documentation

Guide questions

Can a stacked guide follow a template on either end?

It follows the edge at the end where both bearings sit. A bearing at each end gives two different reference positions.

Does a flush trim bit need a fence?

The bearing can follow a suitable reference edge when the specific setup allows it. Follow the router and bit manufacturer’s instructions.

How can I compare a top-bearing description with a photo?

Identify the shank in the photo. Check whether the bearing sits next to it or at the opposite end.

Which accessory suits the job?

  1. The Freud 50-501 puts a pilot at each end. The Whiteside UDFT2100 puts two bearings together at the tip. Use the one whose pilot can contact your template.

    Freud 50-501 dual-bearing flush trim bit ↗Whiteside UDFT2100 compression flush trim spiral ↗

Accessories in this guide

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