Porter-Cable 4212, 4210 instruction manual HALF-BLIND Dovetail BIT Readily Available, Setup

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Some items to consider when purchasing alternate bits for half-blind dovetails are:

1.A shallow angle of the bit requires a deeper cut. A steeper angle requires a shallower cut.

2.The diameter of the bit should be slightly greater than 1/2". The greater the diameter, the deeper the cut.

3.The bit should have a cutting length at least as long as the cutting depth.

NOTE: When using alternate bits, ensure that the pin board (drawer front) is thicker than the depth of cut.

NOTE: When using alternate bits, ensure that the bit will not cut into the base of the jig. For deep cuts, take out most of the material with a straight bit, then follow up with the half-blind dovetail bit.

HALF-BLIND DOVETAIL BIT (READILY AVAILABLE)

 

DOVETAIL BIT

 

APP. DEPTH OF CUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17/32",

7°

 

13/32"

 

 

 

 

17/32",

14°

 

 

3/16"

 

 

 

 

9/16", 7°

 

 

3/4"

 

 

 

 

5/8", 14°

 

 

9/16"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HALF-BLIND DOVETAIL BITS WITH THE TAILS AND PINS CUT SEPARATELY

Using two different-sized dovetail bits to make half-blind dovetails requires separate cuts, similar to cutting the rabbeted half-blind dovetail. This method provides a more hand-cut look and is an important step in creating inlayed half-blind dovetails.

Some items to consider:

Fig. 20A

1.The two bits must have the same angle.

2.A shallower angle requires a deeper cut, while a steeper angle requires a shallower cut.

3.When the diameters of the two bits are added together, the sum must be slightly greater than 1". The closer the sum is to 1", the shallower the depth of cut will be. The larger the sum, the deeper the cut.

BIT COMBINATIONS FOR SEPARATE HALF-BLIND CUTS (READILY AVAILABLE)

LARGER BIT

 

 

SMALLER BIT

 

 

APPROX. DEPTH-OF-CUT

 

 

 

 

 

 

 

 

 

 

3/4", 14°

 

 

 

 

1/2" 14°

 

9/16"

 

 

5/8", 14°

 

 

1/2" 14°

 

 

3/8"

 

 

5/8", 7°

 

 

17/32",7°

 

 

7/8"

 

 

5/8", 7°

 

 

9/16", 7°

 

 

1"

 

 

9/16", 7°

 

 

17/32", 7°

 

 

5/8"

 

 

 

 

 

 

 

 

 

 

 

 

SETUP

The only difference between cutting this joint and cutting the standard half-blind is the use of two router bits. If you use one router, you will have to set the depth-of-cut for each router bit. You can make a simple depth guide as illustrated in Fig. 21A.

If you have two routers, you will not have to go through the process of changing the bit each time you make a different cut. This method requires, however, two 3/4" OD template guides and two template guide locknuts, available from Porter-Cable.

Fig. 21A

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Contents Supplementary Instructiondovetail JIG Manual Table of Contents Important Safety Instructions Safety Guidelines DefinitionsAdditional Safety Rules Replacement PartsBackground Information Miscellaneous Techniques OperationSetup Templates Mounted to Clamping BoardsTHROUGH-DOVETAILS with Clamping Boards Cutting the Tails Cutting the PinsFitting the Joint THROUGH-DOVETAILS with Unlimited Board WidthSet the router bit depth, using the pencil mark from Step Fitting the joint is identical to the previous section a Blind Dovetails with Tail Boards Thicker than 7/8 HALF-BLIND Dovetails with Clamping BoardsWood Grain Cutting the JointUsing a Router Table Alternate Router Bits THROUGH-DOVETAIL BitsTHROUGH-DOVETAIL BIT Combinations Readily Available HALF-BLIND Dovetail BIT Readily Available BOX Joint Bits BOX Joint Bits Readily AvailableDovetail Dado Bits HALF-BLIND Dovetails with Tail Boards Thicker than 7/8 Mitered THROUGH-DOVETAIL Mitering the PinsMitering the Tails THROUGH-DOVETAIL, SKIPPED-PIN MethodHALF-BLIND DOVETAIL, Skipped PIN Method Cutting the Pins SAW Kerf Allowance Method Cutting the Tails BOX END-TO-END Joints Multiple Spacer MethodEND-TO-END Joints Fitting and Cutting the JointDovetail END-TO-END Joints Drawers with Dovetail DadosHinges with a Drilled Hole Wooden HingesHinges with ROUTER-MADE Grooves Hinges with ROUTER-MADE Grooves Setup with the Template Mounted to the Base of the JIG Angled JointsObtuse Angled Joints Cutting the Tails Setup with the Template Mounted to a Clamping BoardCutting the Pins Acute Angled Joints SLANTED-SIDE Joints COMPOUND-ANGLE Joints Setup Blade Tilt Angle Make Angled CUT Inlayed Joints Inlayed Through DovetailMake the First Joint Inlayed HALF-BLIND Dovetail CUT OFF the Inlay BoardMake the Second Joint 100 13/128 050 042 028 014 Inlayed BOX Joint BOX Joint BIT Combinations Tables of Commonly Available Router BIT SizesThrough Dovetail Router BIT Combinations HALF-BLIND Dovetail BitsTroubleshooting Maintenance ServiceAccessories PORTER-CABLE Limited ONE Year Warranty WarrantyMichigan Canadian PORTER-CABLE Delta Service Centers
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