Southbend SB1001 owner manual 16 B, Thread Dial

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

6.Arrange the timing belts and pulleys as indicated in the illustration above the threading chart (see Figures 61–62) and the pulley and belt identification column in the chart.

A

16 B

E F

D

Figure 61. Threading timing belt and pulley

configuration.

	E-140 Belt	A & B-48T
		Pulleys
16T
Pulley
		Pulley
F-140 Belt	D-18T Pulley	Removed
		From Here

Figure 62. Threading timing belt and pulley

identification.

a.Make sure the 16T pulley is on the upper left pulley shaft.

c.Install two 48T pulleys on the upper right pulley shaft (positions A and B).

d.Install the 18T pulley on the D pulley shaft (bottom right).

e.Install two 140XL timing belts in positions E and F.

7.Apply pressure to the upper right pulley as you re-tighten the shaft hex nut on that pulley shaft.

8.Continue to apply pressure on the pulley as you re-tighten the thumb screw to tension the timing belts.

Important: Leave a slight amount of slack in the timing belts when securing the pulleys. Adjusting the tension too tightly will cause excessive wear and stretching. Adjusting the tension too loosely could cause the belt to slip during operation.

9.Close the end cover before re-connecting the lathe to power.

Thread Dial

The numbers on the thread dial show when to engage the half nut during inch threading (refer to thread dial chart for number usage). The thread dial gear must be engaged with the leadscrew for this to work. Use a 5mm hex wrench to loosen the cap screw shown in Figure 63, pivot the dial gear toward the leadscrew so that it properly meshes with the leadscrew threads, then re-tighten the cap screw to hold it in place.

b.Remove the pulley and bushing from the A–Bpulley shaft (see Figure 62).

Note: To remove a pulley, remove the hex nut from the pulley shaft, then remove the pulley. Take care not to displace the shaft key. When re-installing the pulleys, align the pulley keyway with the shaft key, then secure it in the reverse order. Only tighten the hex nut until it is slightly snug—enough to keep the pulley on the shaft. Overtightening it may damage the shaft and bushings.

Cap

ScrewDial

Gear

Figure 63. Thread dial gear engaged with leadscrew.

-43-