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Understanding Guide Bushings

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Understanding guide bushings

Understanding guide bushings

Guide bushings may be the most misunderstood of all router accessories. Their uses include cutting dovetails with a jig, lettering, inlay work, even reproducing furniture parts. Here's the basic concept: A guide bushing mounts to the router's subbase with a tube that protrudes below. A straight router bit extends through the tube. The outer surface of the tube rides against an edge guide or template, keeping the bit a set distance (offset) from the edge guide or template.

What's Available

In the marketplace you'll find two bushing styles. The Porter-Cable two-piece (shown below right) uses a screw-on locking ring to hold the tube part to the router base. This style fits a wide range of models. The other style of guide bushing clicks into place, but only fits Bosch routers. If your router doesn't accept these common styles of guide bushings, consider buying adapters and subbases . Guide bushings are sold individually or in sets. Individual bushings cost $6-$8 each, while sets range from $30-$45.

bosch drop in style

Continued on page 2:  Guide-bushing how-to



Comments (1)
pf2 wrote:

After many years of using my DeWalt DW621 plunge router, I stumbled on the fact that the bushings were off-center relative to the bit -- even the factory bushing plate. Had to rework all my router bases. This wasn't noticed as long as I held the router in the same orientation; but when cutting door slat slots, I had to turn the router for safety/convenience. That's when the issue showed itself. Just a heads up...

1/15/2015 05:41:57 PM Report Abuse

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