Southbend SB1053 Setting Spindle Speed, Configuration Examples, Example 1 Spindle Speed of 40 RPM

16-Speed Gearhead Lathe O P E R A T I O N For Machines Mfg. Since 3/11

Setting Spindle Speed

Selecting one of the 16 spindle speeds available is a combination of configuring the two-speed motor switch, the spindle range lever, and the spindle speed lever shown in Figure 73.

Spindle Speed

& Range Levers

Motor

Switch

Figure 73. Spindle speed controls.

The spindle speed and range levers control the gear configuration in the headstock to produce the selected spindle speed. The spindle range lever selects speeds in the low or high range to be available for the spindle speed lever. The spindle speed lever selects one of the speeds available in the active spindle speed range.

Never change spindle speeds while spindle is moving! Severe machine damage will occur.

Configuration Examples

Use the following examples to better understand how to read the spindle speed chart and configure the controls for the correct speed.

Example 1: Spindle Speed of 40 RPM

1.Make sure the spindle is completely stopped and the spindle ON/OFF lever is in the OFF (middle) position.

2.Turn the motor switch to the LOW (left) position. This will make the speeds in the top row of the spindle speed chart available (see Figure 74).

Low Motor Speed

Makes Top Row

Available

Figure 74. A low motor speed makes the spindle

speeds in the top row of the chart available.

3.Move the spindle range lever so that the indicator points to the upper line (see the illustration in Figure 75). This will make the first four or lower speeds in the top row of the chart available.

Note: If necessary, use the chuck key to rock the spindle back-and-forth to help mesh the gears as you move the levers.

Spindle Speed	Spindle Range
Lever at “A”	Lever at the
(40 RPM)	Low Range

C

B

A

D

4060 100 165 245 375 625 1000

80	120	200	330	490	750	1250 2000
A	B	C	D	A	B	C D

Figure 75. Setting the spindle speed at 40 RPM.

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