Southbend SB1001 Power Feed Threading Setup, Selecting Spindle Speed, Timing Belts & Pulleys

Model SB1001 8K™ Lathe O P E R A T I O N For Machines Mfg. Since 8/11

Note: As you tighten the tensioning bolt, the shafts will straighten and apply more tension to the belts. The correct amount of belt tension is when there is approximately 1⁄4"–3⁄8" deflection with moderate pressure applied to the belt between the pulleys (see Figure 50).

Important: Do not overtighten the belts—this could cause the machine to run hot and cause damage to the motor and bearings.

Pulley

Deflection

Pulley

Figure 50. Testing for correct drive belt tension.

Selecting Spindle Speed

When spindle rotation is started with the spindle switch, the spindle speed is selected by rotating the spindle speed dial (see Figure 51) until the tachometer display shows the desired spindle speed.

Power Feed &

Threading Setup

Timing Belts & Pulleys

The rate that the carriage moves when engaged with the longitudinal leadscrew for power feed or threading operations is controlled by the configuration of the timing belts and pulleys (see Figure 52).

Timing

Belt

Pulley

Figure 52. Timing belt and pulley.

The timing belt and pulley configurations for the available feed rate and threading options are displayed in the chart on the front of the end cover (see Figure 53).

Spindle	Tachometer
Speed
	Display
Dial

Figure 51. Spindle speed controls.

The maximum recommended spindle speed is 2300 RPM. DO NOT exceed this for more than a brief period of time or machine damage may occur.

Feed Rate

& Threading

Chart

Figure 53. Feed rate and threading chart.

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