Grizzly g0669X owner manual Setting Spindle RPM, Rotating the Ram, Calculating RPM

Rotating the Ram

1.DISCONNECT THE MILL FROM POWER!

2.Loosen the four rotation locking bolts on top of the column shown in Figure 34.

Locking

Bolts

Locking

Bolts

Figure 34. Ram rotation locking bolts.

3.Manually rotate the ram around the column to the desired position.

Note: Take care not to entangle or stretch the electrical cabling as you move the ram and head.

4.Re-tighten the four rotation locking bolts to hold the ram in place.

G0669X Precision 10" x 54" VS Milling Machine

Setting Spindle RPM

To select the correct spindle RPM for your milling operation, you will need to: 1) Determine the RPM needed for your workpiece, 2) select the correct spindle speed range, and 3) configure the spindle speed controls for the calculated RPM.

Calculating RPM

1.Use the table in Figure 35 to determine the cutting speed required for your workpiece material.

Cutting Speeds for High Speed Steel (HSS)

Cutting Tools

Workpiece Material	Cutting Speed (SFM)
Aluminum & alloys	300
Brass & Bronze	150
Copper	100
Cast Iron, soft	80
Cast Iron, hard	50
Mild Steel	90
Cast Steel	80
Alloy Steel, hard	40
Tool Steel	50
Stainless Steel	60
Titanium	50
Plastics	300-800
Wood	300-500

Note: For carbide cutting tools, double the cutting speed. These values are a guideline only. Refer to the MACHINERY'S HANDBOOK for more detailed information.

Figure 35. Cutting speed table for HSS cutting

tools.

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