Router Bit for Side-cutting Slots for 6.25mm braid and tape

This tool makes creation of a braided track very easy.  The side-cut blades are tungsten hardened, and rated up to 24,000rpm.

The router bit has a 3.45mm diameter guide pin, 5.5mm - 6mm in length from the end of the cutting blade, which fixes the position of the overall bit as being centred over a main slot of 3.5mm. This allows the user to simply "drive" the router around their track, following accurately the main slot which has been cut. [Other diameter guide pins such as 3.15mm for use with a 3.18mm (1/8th) main slot cutter can be supplied on request] 

The centre pin rides in the track slot which keeps the router bit perfectly centred - so that both "gains" are the same width around the entire layout (even in the corners).  In contrast, using a router base with a 2 pin (leading/trailing) setup and a standard router bit will result in gains with different widths in the corners (one gain will be a little too narrow, the other gain a little too wide).

The "side-cut blades" cut a shallow groove either side of the main slow, to allow for setting the braid or copper tape flush with the main surface of the track.

This bit will cut an 18mm wide slot, at whatever pre-set depth you set up in your router. Using standard "1/4" braid  [6.25mm] this enables the braid to sit a minimum of 0.5mm away from the edge of the slots, to prevent it being fouled and torn by car guides.
To cut a 0.75 - 0.80mm deep slot for recesssing braid, ensure that your initial slot cut is a minimum depth of 6.5mm (6.5mm-0.8mm = 5.7mm)

An instruction sheet is included with the bit on good practice for acheiving a consistent result.
I cut a total of 55 metres of side-slot recess (18.5 metres x 3 lanes) in just over an hour, using only gentle forward motion, and did not require any remedial work at the end.