Southbend SB1053 Alternate Configuration, Configuring End Gears, To configure the end gears

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

Alternate Configuration

Use the alternate end gear configuration when cutting modular or diametral threads, as illustrated in Figure 84.

24T

56T

44T

Modular and Diametral

Pitch Turning

57T

Spacer

Figure 84. Alternate end gear configuration.

Configuring End Gears
Tools Needed	Qty
Hex Wrench 6mm	1
Wrench 22mm	1

To configure the end gears:

1.DISCONNECT LATHE FROM POWER!

2.Remove the end gear cover from the left side of the headstock.

3.Remove the cap screw, lock washer, and flat washer from the 57 tooth end gear (see Figure 85).

Pivot Arm

Hex Nut

57 Tooth

4.Loosen the pivot arm hex nut shown in Figure 85, then swing the pivot arm to the left so that 44T/56T gears are away from the 57T gear. Hand tighten the hex nut to keep the arm in place.

As you remove and replace end gears, use a stiff brush and mineral spirits to clean away the debris and grime from them, then re-lubricate them as instructed in End Gears on Page 71.

5.Making sure to keep the shaft key firmly seated, remove the spacer and the 57T gear, then re-install them as follows:

—For the standard end gear configuration, slide the 57T gear on first, then the spacer on the outside.

—For the alternate end gear configuration, slide the spacer on first, then the gear.

6.Re-install the cap screw, lock washer, and flat washer you removed in Step 3 to secure the spacer and 57T gear. Do not overtighten.

7.Slide the pivot arm back so that either the 44T or the 56T meshes with the 57T gear, then retighten the pivot arm hex nut.

Note: Make sure to keep approximately 0.002" play between the gears.

8.Replace and secure the end gear cover before re-connecting the lathe to power.

Cap Screw,

Gear

Washers & Spacer

Figure 85. End gear components.

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