Routing with a Template
The guide bush is used in conjunction with
a template when the routing operation is
repetitive or the workpiece is complex in
shape. The template is fixed to the upper
surface of the workpiece. A cutter is chosen
with a diameter which will pass through the
centre of the bush leaving enough
clearance. The cutter can be straight or
shaped. The router can then be guided
around the template so that the shape of
the template will be replicated.
Making the Template
The template is cut from 6mm or
1
/4” MDF,
plywood or plastic to the shape required.
The guide bush offset needs to be allowed
for when calculating the shape of the
template. The template must be smaller by
an amount equal to the difference between
the ‘outer edge of the guide ring’ and the
‘outer edge of the cutter’. See below for the
offset calculation. The edge of the template
must be free of imperfections as these will
be replicated in the final workpiece.
Calculations for template offset
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