Southbend SB Two Circular Slots, To make five evenly spaced holes, To make two circular slots

SB1363-64/SB1367-68 O P E R A T I O N Mfg. Since 10/09

Tip: When using the rotary table to machine several locations or with a complicated pattern, make a drawing with measurement details to help visualize the operation. This will reduce the risk of making errors during the operation.

To make five evenly spaced holes:

1.Use the handwheel to rotate the rotary table to the 0° mark on the rotation scale, then tighten both table locks.

2.Drill the first hole.

3.Unlock the table, then turn the handwheel 18 full turns. This will rotate the rotary table to 72°, as displayed on the rotational scale.

Important: Be careful not to pass the handwheel scale 0° mark on the last turn. If you go past the 0° mark, reverse the handwheel one full turn, then try again. This will eliminate any backlash error that occurs when reversing the handwheel direction.

4.Lock the table in place and drill the hole.

5.Repeat Steps 3–4to produce the third hole at 144°, the fourth hole at 216°, and the fifth hole at 288°.

Two Circular Slots

In this example, you will cut two 92° circular slots in a round workpiece, as illustrated in Figure 13.

92º

Radius 1.125"

	25"	Start
0.		Here

Figure 13. Layout for creating two

circular slots.

To make two circular slots:

1.Use the handwheel to rotate the rotary table to the 0° mark on the rotational scale, then tighten the table locks.

2.Move the mill table to the left 1.125" along the X-axis so that the spindle is at the starting point above the lower end of the upper slot.

3.Install a 1⁄4" end mill in the mill spindle, then make a 0.083" deep hole (approximately 1⁄3 the cutter diameter).

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