Tip #92
How to Drill Angular Holes
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Operations:
Let us drill four 3/16" diameter holes.

Method 1

1. Prepare a piece of stock 3/4" x 5" x 15".

2. Scribe a longitudinal on one side 1-1/4" from one edge. Intersect this line with four squared lines 3" apart. Make punch marks at the four intersections.

Fig. 2Click image for larger view.

3. Secure a 3/8" drill bit in chuck.

4. Drill 3/8" holes 1/4" deep, angled 90-degrees to the surface, centered at punch marks.

5. Replace drill bit with 3/16" size.

6. Tilt table to 20-degrees mark and lock.

Fig. 3 Click image for larger view.

7. Place fence on lower half of table and cover upper side of fence with a piece of scrap.

8. Position lower wall of right hand hole under point of drill bit by adjusting position of fence and stock.

9. Drill through the lower edge of stock. The hole should come out approximately in the center of the lower edge.

10. Drill similar holes at the other three punch marks.

Fig. 4 Click image for larger view.

Method 2

1. Prepare a piece of stock 3/4" x 1-3/4" x 8". Note: This stock will be used as a “Leveling Block”.

2. Perform Operations 1, 2, 5, 6 and 7 of Method 1.

3. Set edge of leveling block on scrap and side flat against stock to be drilled. Slide block until it is centered over the squared line through the right hand punch mark.

Fig. 5 Click image for larger view.

4. Position the fence, block, and stock so that the drill bit point will enter the top edge of the block close to the surface of the stock and aligned with the right hand punch mark.

5. Drill similar holes at the other three punch marks using the same leveling block.

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