|I often use medium-density fiberboard (MDF) for
my shop jigs and fixtures. There are many things I like about MDF. It's stable,
heavy and costs about half as much as cabinet-grade plywood.
One thing I
don't like about MDF is its tendency to split along the edge of a
workpiece. But, luckily, there are a couple of things you can do to avoid this
MDF tends to split most often when drilling and screwing in
its edge, especially when using a tapered woodscrew, left above. It acts
like a wedge to drive the workpiece apart. So I've gotten into the habit of
using a straight-shanked screw, right above.