How to Prevent Wood Burn and Remove Burn Mark Discoloration from Routing
posted on December 1, 2011 by Woodworker's Journal

Q: It seems, no matter how careful my technique or sharp my bit, that any time I rout a decorative edge or create a molding, somewhere along the edge I will get router burn. I hate to completely redo an entire piece for just a small area. Is there some way to remove this discoloration?

Planing, scraping, filing, or sanding wood can help remove unsightly router burn Router burn is a common problem on a decorative edge in woods like cherry or maple. A sanding or detail block can help reduce or remove it.

A: Burn marks on wood result from excessive heat generated by some machinery operation. You can scorch a board while sawing it, drilling it, routing it, even sanding it. Of course, the best strategy for dealing with burn marks is avoidance. Keeping blades and bits both clean and sharp is important. Using good technique, as you indicate, is also important. When profiling an edge, you must feed the router (or, on the router table, the workpiece) briskly and continuously. Every hesitation or pause can result in a burn, especially if you’re working a susceptible wood like cherry or maple. Planing, scraping, filing, and sanding will remove burn marks. But you must work carefully. The hazard is that you’ll distort the profile or contour. Take your time. Use a crisp-edged sanding block or a detail block matched to a contour’s proportion — a convex block for a cove, a concave block for a bead. Begin your work some distance from the burn so you don’t produce an obvious hollow in place of the burn. Depending upon the location and extent of the burn, a redo actually may be the best option. You often can, for example, joint the edge that guides the router, then re-rout the profile, removing the burn. The operation can be faster than a lot of persnickety hand-sanding and yield a crisp, unblemished profile.

posted on December 1, 2011 by Woodworker's Journal
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Comments

3 thoughts on “How to Prevent Wood Burn and Remove Burn Mark Discoloration from Routing”

  • ddempcy

    Also on a router, you can make one pass 1/32 to 1/16 less of depth than you need and make a second pass at the correct depth thus removing any burn marks left from the 1st pass and removing alot less material on 2nd and final pass which greatly reduces the chances of burn marks.

  • Barry McCulloch

    I have had problems with burn marks from the router bits. Would you e-mail whatever you have on file relating to this problem. Thank you,

    Barry

  • David Klenk

    the best way to avoid router burn is to use a variable speed router set on a slower speed.

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