he Model 200 Jasper Tools Circle Jig was designed primarily for
making speaker cut-outs and flush mounting speaker drivers. The Model
200 allows the speaker-builder to be able to make 256 different size
circles in 1/16 inch increments.
This will enable holes to be easily
made for tweeters all the way up to sub-woofers! It is the first true
one-pass circle jig. Trial cuts are not necessary when using the Model
200. All you need to know is where you want the centre of the circle,
the jig comes complete with a centre pin which you simply fit into the
drilled hole and then pivot around it.
This jig also allows you to make partial cuts or rebates into the
timber in the same easy fashion. Now you can mount the speaker driver
flush against the wood for a very professional finish with the added
benefit of reducing sound diffraction against the speaker's edge.
The Model 200 will cut circles from 2 1/4 inches to 18 3/16 inches in
diameter, in 1/16 inch increments. The jig has an easy to read scale
that is calibrated for a 1/4 inch router bit.
The Model 200 will
generate circles that are smaller than the base of the router. This
requires that some of the pivot holes be located under the router base. A
matching centre locating pin is also available, the Model 350.