How To Make A Router Table Spline Jig
13 Simple Steps To Making A Router Table Spline Jig
In use, pass the work in the spline jig once only from right to left. A repeat cut may not follow exactly the same path, resulting in a wider slot.
Step 1
Prepare the base of the spline jig. It is important to remember that the edge that bears against the router fence should be planed straight.
Step 2
Measure half way on the straight edge and mark line across the middle. Black biro is used here for clarity.
Step 3
Mark a 45° mitre on each hardwood fence.
Step 4
Cut off the waste, and sand the mitred end on the disc sander.
Step 5
Mark off a line each side at 45° and 10mm away from the centre line.
Step 6
On each line, mark the positions of three screw holes and drill with a 4mm drill.
Step 7
Countersink the reverse side.
Ensure that the countersinks are sufficiently deep so that the screw heads won’t foul the surface of the router table.
Step 8
From the point where the centre line meets the edge, mark off another pair of lines at 45°, thus forming a broad ‘arrow’. These lines locate the sides of each fence on the base board.
Step 9
Place each fence in turn along a line, leaving the mitred face around 10mm from the edge of the router table spline jig. Mark off and cut to length; use the disc sander to clean up the end.
Step 10
At this point, clamp one fence in position, ensuring that it’s at 45° to the front edge. Insert one screw and adjust the fence position if required.
Step 11
When the fence is in the correct position, secure it with another G clamp and drive in the remainder of the screws.
Step 12
Position the second fence and clamp to the base board, ensuring that the internal angle is 90°. Drive in the three screws.
Step 13
Completed router table spline jig and in use and on the router table.
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