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DIY Fold-Down Planer Extension Tables for Long Boards

By: Erich Lage
Need more support for long boards at your thickness planer? These shop-made fold-down extension tables use sliding support frames to provide extra infeed and outfeed support, then tuck away when the job is done.

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Space-Saving Fold-Down Thickness Planer Tables

Benchtop thickness planers are handy machines, but their short infeed and outfeed tables don't provide much support when you're working with long boards.

I wanted to extend the tables on my planer, but I didn't have room for a large, permanent setup. The solution was a pair of fold-down extension tables that provide extra support when I need it and tuck away when I'm finished.

How the Fold-Down Tables Work

Each extension table is hinged to the planer and supported by a sliding frame underneath.

When I need the extra support, I simply lift the table and pull out the frame. The frame rides on a set of full-extension metal drawer slides, making it easy to move into position.

Once the frame is extended, I level the table and support frame, then tighten a pair of star knobs to lock the assembly in place.

This creates a stable surface for supporting longer workpieces as they pass through the planer.

Simple Construction, Smooth Support

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The extension tables are made from 3⁄4" melamine, which provides a smooth surface for boards to slide across.

There are three important details to the design.

First, the tables are bolted to the planer so they align with the planer bed.

Second, the tables rest on the sliding support frames but aren't permanently attached to them. This allows the frames to retract independently when the tables are folded down.

Finally, the sliding frame assembly mounts to a support structure attached beneath the planer stand.

Together, these features create a sturdy setup without requiring a large, permanent outfeed table.

Fold Everything Away When You're Done

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When I'm finished planing, I loosen the star knobs, slide the support frames back underneath the planer, and lower the hinged tables.

The extensions are out of the way until the next time I need to plane long stock.

It's a practical upgrade for a small woodworking shop, giving a benchtop thickness planer the support of a much larger setup without sacrificing valuable floor space.

WOODSMITH TIP: Check the Table Alignment. Before running stock through the planer, make sure the extensions are properly aligned with the planer bed and securely supported. Follow your planer's setup instructions for adjusting infeed and outfeed support to minimize snipe and prevent boards from tipping.

More Ways to Upgrade Your Workshop

A few well-designed shop-made accessories can make your woodworking machines easier to use and more versatile. Explore more workshop jigs, fixtures, and tool upgrades that improve accuracy, support, and convenience without taking up unnecessary space.

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EXPLORE WORKSHOP JIGS & FIXTURES → Get More from the Tools You Already Own

Published: Nov. 13, 2014
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