Delta 36-978, 36-979 instruction manual Using AN Accessory Dado Head

1.You can easily attach a moulding cutterhead (A) Fig. 77 to the saw arbor. Also, you must use the accessory moulding cutterhead table insert (B) in place of the standard table insert.

2.When using the moulding cutterhead, add wood-facing (C) to the face of the rip fence (Fig. 78). The wood-facing is attached to the fence with wood screws through holes which must be drilled in the fence. Stock that is 3/4" inch thick is suitable for most work, although an occasional job may require 1" facing.

3.Position the wood-facing over the cutterhead with the cutterhead below the surface of the table. Turn the saw on and raise the cutterhead. The cutterhead will cut its own groove in the wood-facing. Fig. 78 shows a typical moulding operation.

Never use a moulding cutterhead in a bevel position.

Never run the stock between the fence and the moulding cutterhead. Irregular-shaped wood will cause

kickback.

Give special attention to the grain direction. Make all cuts in the same direction as the grain whenever possible.

Always install the blade guard after the operation is complete.

B A

Fig. 77

USING AN ACCESSORY DADO HEAD

The blade guard and splitter assembly cannot be used when dadoing or moulding. It must be removed as described in “USING AN ACCESSORY MOULDING CUTTERHEAD” section.

Use pushsticks, hold-downs, jigs, fixtures, or featherboards to help guide and control the workpiece when the guard cannot be used.

The accessory dado head set table insert (B) Fig. 77 must be used in place of the standard table insert.

Dadoing is cutting a rabbet or wide groove into the workpiece. Most dado head sets are made up of two outside saws and four or five inside cutters, (Fig. 80). Various combinations of saws and cutters are used to cut grooves from 1/8" to 13/16" for use in shelving, making joints, tenoning, grooving, etc. The cutters are heavily swaged and must be arranged so that the teeth do not hit each other during rotation. The heavy portion of the cutters should fall in the gullets of the outside saws (Fig. 80). The saw and cutter overlap is shown in Fig. 81 - (A) being the outside saw, (B) an inside cutter, and (C) a paper washer or washers, used as needed to control the exact width of groove. A 1/4"groove is cut by using the two outside saws. Position the teeth of the saws so that the raker on one saw is beside the cutting teeth on the other saw.

C

Fig. 80

Fig. 78

Fig. 79

AB

C

Fig. 81

29