Jointer Extension Table

DIY Adjustable Jointer Extension Tables

DIY Adjustable Jointer Extension Tables

A couple months ago I restored a Beaver 3800 jointer. It’s worked beautifully since then, but an issue I kept running into was the bed length – at 34″, the Beaver has a pretty short bed. This makes jointing longer boards difficult and downright dangerous. Clearly I needed some sort of jointer extension.

Because of the age of the machine, it was highly unlikely I would be able to find the extension rollers that were made by Beaver back in the day. I also wanted tables rather than rollers, as they provide better support to the workpiece throughout the cut.

Adjustable jointer extension tables

The jointer extensions are made of two layers of plywood with a levelling mechanism

I decided to make some extensions out of some 3/4″ plywood. The extensions are made of 2 layers of plywood, with an additional strip underneath to provide extra rigidity. The tables attach to the bed using three bolts each. Of course, being a jointer, I needed to add some sort of levelling mechanism. I used threaded inserts in the top layer of plywood, and some bolts that pass through nuts in the lower layer. This allows me to level each of the tables at the 4 corners.

DIY jointer extension tables for Beaver 3800

The extension beds are each 24″ long, bringing the total bed length to 82″.

Each of the tables is 24″ long, bringing the total length to 82″ long. This means I can now joint boards longer than 8′ with no fear of tipping. The tables are surprisingly rigid and have very little flex even at the ends. This turned out to be a very cheap, quick and effective solution, and because it doesn’t need any legs, it allows me to roll the jointer out of the way when not in use.

 

Posted by Prairie Artisan Woodshop in Beaver 3800, DIY Jointer Extension, This and That, 2 comments