A store-made jig simply solves your good dado issues.
I usually make dadoes on the desk noticed utilizing a stackable dado head, however generally you’ve received to make them on the bench with a handheld router — when plowing dadoes in giant items, for instance, or making stopped dadoes. Router bits present an excellent high quality of minimize, even in veneered supplies, however don’t supply the adjustability that dadoes do. This could make it tough to get completely sized dadoes. A store-made jig simply solves your good dado issues so that you received’t pitch a match over getting a good match.
This jig is made out of three/4-in. (19 mm) Baltic birch plywood, Picture 1. Since Baltic birch is barely thinner than cupboard grade plywood, the jig can relaxation on the cupboard materials with out touching the bench under.
The top-to-head distance ought to be at the least 24-in. so you might have sufficient house to suit a typical kitchen base cupboard aspect within the jig. Essentially the most crucial side of constructing the jig is ensuring that the mounted leg is completely perpendicular to the heads earlier than you screw and glue it in place. If this alignment is off your dadoes received’t be sq. to the sting of the cupboard aspect.
The adjustable leg has two 1-in. holes that match over 1/4-in. carriage bolts coming out of the pinnacle. The 1-in. gap permits room to place the adjustable leg to permit for variations in plywood thickness. Drill the carriage bolt holes 5-1/4-in. from the sting of the mounted leg. Drill the 1-in. holes so the middle is 4-1/2-in. from the sting that may go in opposition to the mounted leg.
Slip the carriage bolts by the pinnacle, use fender washers to bridge the massive holes, and use a knob or wing nut to lock the adjustable leg in place.
A Bit Of Tooling
The dado jig depends on a sample model router bit to chop the dadoes, Picture 2. The diameter of the bit must be lower than the thickness of the fabric you’re chopping the dado for, so you possibly can minimize the dado in two passes.
The bearing on the bit will experience on the legs of the jig, “tracing” them so as to minimize the dado.
Utilizing The Jig
Use the jig by first marking the joint location on the case aspect. Maintain the pinnacle of the jig in opposition to the sting of the cupboard aspect, place the mounted leg on the mark, and clamp the jig in place. Sandwich a bit of shelf materials within the dado, Picture 3. Squeeze the adjustable leg in opposition to the shelf and stuck leg and lock the wing nuts. Now the house between the legs is strictly the thickness of your materials. Lock the jig to the cupboard aspect with further clamps.
Set the depth of minimize on the router bit, and also you’re able to go. The primary time you use the jig you’ll minimize into the heads. When you’re chopping commonplace 1/4-in. or 3/8-in. deep dadoes it’s no large deal, as there’s loads of wooden left within the heads to maintain the jig collectively. The bit will experience in opposition to one leg on the outbound go and the opposite leg on the inbound go.
You may rout all the way in which throughout for a full width dado or half manner throughout for a stopped dado. Use a plunge router and you’ll minimize a dado that’s stopped on each ends. (Watch out that you just don’t plunge into the jig.) Get somewhat artistic and you need to use the jig to rout dadoes at funky angles. Fairly versatile!