CORE BOX BIT T416 ½
Core box bit, T416 ½. Cut finger slots in the sides of boxes, and in lift-out insert trays.
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All these cutters are designed for use in a table mounted router, and should not be used in a hand held router. The cutters are not guaranteed against breaking. The spiral cutter in particular, has a fine tip and should always be used in the table with a fence.
Take extra care to note the feed direction of the rebate cutter. With all cutting operations, the feed direction is opposite to the direction of motion of the cutting tips (i.e. opposite the direction of the tips as they enter the work piece).
Prolong the life of your cutter and save money.
 Before every box making session, place a drop of sewing machine oil in the bearing. The bearing is not sealed, so dirt and grime build up over time. If you do not keep the bearing clean, it will seize, causing damage to the cutter and your template.
 Regularly check that the grub screw in the side of the cutter has not vibrated loose. Alternatively, use a product like ‘Loctite’ to fix the grub screw in place. Hint: to glue in a grub screw, first place a light coloured cloth on the kitchen table [I guarantee you will lose the grub screw if you do this in the workshop]. Position the screw hole over the flat edge on the cutter housing. Place a small drop of ‘Loctite’ in the hole and screw in the grub screw.