Grizzly H8203 owner manual Calibrating Drill Bit, To calibrate the drill bit

Angle Scale: Indicates the point angle to be sharpened; the angle can be adjusted from 90º— 140º depending upon the workpiece material to be drilled.

Grinding Area: Location where the CBN wheel grinds the drill bit point angle to the selected angle.

ON/OFF Switch: Turns the machine ON or OFF.

Calibrating Drill Bit

The following steps must be done to prepare the drill bit to be sharpened.

To calibrate the drill bit:

1.Use the chart below or the one on the collet tray cover to select the appropriate collet for your drill.

Metric Size	Fractional-	Collet No.
	Inch Size
2.0-3.0	Less than 1⁄8"	3	2
3.1-4.0	1/8"-5/32"	4	3
4.1-5	11/64"-3/16"	5	4
5.1-6	13/64"-1/4"	6	5
6.1-7	17/64"-9/32"	7	6
7.1-8	19/64"-5⁄16"	8	7
8.1-9	21/64"-23/64"	9	8
9.1-10	3/8"-25/64"	10	9
10.1-11	13/32"-7/16"	11	10
11.1-12	29/64"-15⁄32"	12	11
12.1-13	31/64"-1⁄2"	13	12

2.Insert the collet at a slight angle into the lock ring, as shown in Figure 9.

Lock Ring

Collet

Figure 9. Inserting collet into lock ring.

3.Thread the collet holder onto the lock ring two turns for now, and insert the drill bit into the collet holder as shown in Figure 10.

Collet Holder

Figure 10. Drill bit installed in collet holder.

4.Turn the calibrating dial right until it stops at the "0" position, then align the arrow on the calibrating device with the number on the dial that corresponds to the drill bit diameter.

For example, turn the dial to "7" for a 7mm diameter drill bit, as shown in Figure 11.

Figure 11. Calibrating dial set for a 7mm drill bit.

-14- H8203 Professional Drill Sharpening Machine