Jasper Tools Circle Jig Model 240
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$99.00 each - out of stock
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Description: Jasper Tools Circle Jig Model 240
Plunge Router Cutting Jig for Speaker Holes - 1" 2.54cm) to 18 3/16" (46.2cm) in diameter, in 1/16" (1.5875 mm) Increments Approx.
The Model M240 Jasper Circle Guide can help you to make different size circles from 1 inch to 18 3/16 inches in 1/16 inch increments.
Model M240 PRO Jasper Circle Guide is the same as the M240 guide except it is made of virtually unbreakable polycarbonate plastic. These guides make different size circles from 1 inch to 18 3/16 inches in 1/16 inch increments.
The Model 240 Jasper Tools Circle Jig was designed primarily for making speaker cut-outs and flush mounting speaker drivers. It fits virtually all routers, you can use the supplied centring jig to drill your own holes if your router doesn't match the pre-drilled holes.
Circle Diameter: 1 inch (2.54 cm) to 18 3/16 inches (46.196 cm) in diameter, in 1/16 inch (1.5875 mm) increments. (approx.)
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.
Jasper Tools Model 240 circle jig in use (router not included).
Jasper Tools Model 240 in use.
SAFETY: Read all the precautions that came with your router. Make sure your router is unplugged while changing the bit and leave router unplugged until you complete your set-up and you are ready to route your circle. Always use eye and hearing protection while routing.
GENERAL INFORMATION: The pivot holes are precision drilled so that the jig holds the pin in the selected hole without falling out.
MOUNTING THE JIG TO THE ROUTER: Locate your router on the diagram on the back of the package. Locate and mark the mounting holes for your router on the diagram. Align the jig over the diagram so that the mounting holes on the jig are aligned with the diagram. Locate the marked mounting holes for your router and mark the countersinks on your jig with a felt pen. Locate the jig on the router so that the holes that you marked align with the holes in the base of your router and mount the jig with the supplied screws, or use the supplied centring jig to drill your own holes if your router doesn't match.
HOW TO USE THE SCALE: The jig has inches listed along the horizontal scale on the bottom edge of the pivot hole pattern, and the fractions listed vertically along the left end. To find the 12 1/2 inch pivot hole, find the 12 inch column of holes from the horizontal scale and the 1/2 inch row of holes from the vertical scale. Follow these lines to the 12 1/2 inch pivot hole and insert your pivot pin there.
CUTTING DISKS: The jig is calibrated to make HOLE cut-outs using a 1/4 inch diameter router bit. To make disks, use a 1/4 inch router bit and add 1/2 inch to the scale.
USING OTHER BIT DIAMETERS: To make a cut-out with a bit other than 1/4 inch diameter, select the pivot hole by using the following equation:
To make a disk with a bit diameter other than 1/4 inch, use the following equation:
SETTING UP: The figure below shows a typical set-up for cutting circular holes, mortises, or disks. The work piece should be taped to the backup with double sided tape on both the inside and the outside of the cut-out. Using a 1/8 inch diameter drill bit, drill a vertical hole through the work piece and into the backup. This hole should be located at the centre of the circle to be cut.
CONVERSIONS: To convert mm to inches: Inches = mm / 25.4. Use the following example to convert decimal fractional parts to fractional parts: If your cut-out is 6.729 inches, you convert the fractional part (0.729) to 1/16ths of an inch by multiplying 0.729 x 16 which is equal to 11.664. Round this number up to 12. So your cut-out would be 6 12/16 or 6 3/4 inches in diameter.
Set-up for circle routing.