Four-Way Tool Post

 

Spindle Speed

 

 

 

 

 

 

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

The four-way tool post allows for quick indexing to new tools. This is accomplished by loosening the top handle, rotating the tool post to the desired position, then re-tightening the handle to lock the tool into position.

Tools Needed

Qty

4-Way Tool Post Wrench

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To load the tool post:

 

1.Choose the desired cutting tool.

2.Loosen the tool post bolts so that the cutting tool can fit underneath the tool post bolts.

3.If necessary, place shims underneath the cutting tool so that the cutting tip is properly aligned with the workpiece.

4.Use a minimum of two tool post bolts to secure the cutting tool and tighten firmly (see

Figure 50).

Tool Post Bolts

Top

Handle

Tool

Figure 50. Tool holder and tool post.

5.Repeat Steps 14 for the three remaining openings, as needed.

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To set the correct spindle speed for your opera- tion, you will need to: 1) Calculate the spindle speed (RPM) needed for your operation, and 2) configure the spindle speed levers for the calcu- lated speed.

NOTICE

ALWAYS make sure the spindle is turned OFF and is at a complete stop before changing any gear configuration to prevent damage to the lathe gearing and voiding the warranty.

Calculating Spindle Speed

1.Use the table in Figure 51 to determine the recommended cutting speed for the workpiece material.

Note: Cutting speeds are expressed in SFM (surface feet per minute) that the workpiece moves against the cutter, which is different from the spindle speed (RPM).

Recommended Cutting Speeds

 

Average Tool Speed (sfm)

Work Material

Rough Cuts

Finish Cuts

Magnesium

400

800

Aluminum

350

700

Brass & Bronze

250

500

Copper

100

250

Cast Iron (Soft)

100

250

Cast Iron (Hard)

50

150

Mild Steel

100

250

Cast Steel

70

150

Alloy Steels (Hard)

50

150

Tool Steel

50

150

Stainless Steel

60

180

Titanium

90

200

Hi Maganese Steel

40

100

Note: These values are based on HSS cutting tools. For carbide cutting tools, double the aver- age speed. These values are a guideline only. Refer to the MACHINERY’S HANDBOOK for more detailed information.

Figure 51. Cutting speed table.

Model G0554Z (Mfg 01/09+)

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Grizzly G0554Z owner manual Four-Way Tool Post Spindle Speed, Calculating Spindle Speed, To load the tool post