Southbend SB Compound Rest, Four-Way Tool Post, Installing Tool, Tool Needed, O P E R A T I O N

Models: SB

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Compound Rest

 

O P E R A T I O N

 

13" Heavy 13® Gearhead Lathe

For Machines Mfg. Since 5/11

 

 

 

Compound Rest

The compound rest handwheel has an indirect- read graduated scale. This means that the distance shown on the scale represents the actual distance the cutting tool moves. The base of the compound rest has another graduated scale used for setting the cutting tool to a specific angle.

Graduated Dial

 

Increments

0.001" (0.02mm)

One Full Revolution

0.100" (2.54mm)

Tool Needed

Qty

Wrench 14mm

1

To set the compound rest at a certain angle:

1.Loosen the two hex nuts at the base of the compound rest (1 of 2 shown in Figure 58).

Compound

Hex NutRest

(1 of 2)

Angle Scale

Figure 58. Compound rest.

2.Rotate the rest to the desired angle, as indicated by the scale at the base, then retighten the two hex nuts.

Tip: The first time you set the angle of the compound rest for cutting threads, mark the location on the cross slide as a quick reference point. This will allow you to quickly return the compound rest to that exact angle the next time you need to cut threads.

Four-Way Tool Post

The four-way tool post is mounted on top of the compound rest and allows a maximum of four tools to be loaded simultaneously.

Each tool can be quickly indexed to the workpiece by loosening the top handle, rotating the tool post to the desired position, then re-tightening the handle to lock the tool into position.

Installing Tool

 

Tool Needed

Qty

Tool Post T-Wrench

1

To install a tool in the tool post:

1.Adjust the tool post bolts so that the cutting tool can fit underneath them (see Figure 59).

Tool Post

Bolt

Cutting

Tool

Figure 59. Example of tool mounted in tool post.

Over-extending a cutting tool from the post will increase the risk of tool chatter, breakage, or tool loosening during operation, which could cause metal pieces to be thrown at the operator or bystanders with great force. DO NOT extend a cutting tool more than

2.5times the width of its cross-section (e.g, 2.5 x 0.5" = 1.25").

2.Firmly secure the cutting tool with at least two tool post bolts.

3.Check and adjust the cutting tool to the spindle centerline, as instructed in the next subsection.

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Page 48
Image 48
Southbend SB Compound Rest, Four-Way Tool Post, Installing Tool, Tool Needed, To install a tool in the tool post