Grizzly G3358 Graduated Dials, Cutting Speeds for High Speed Steel HSS Cutting Tools, Example

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 cut- ting speed. These values are a guideline only. Refer to the MACHINERY'S HANDBOOK for more detailed information.

Figure 29. Cutting speed table for HSS cutting

tools.

Failure to follow RPM and feed rate guide- lines may threaten operator and bystander safety from ejected parts or broken tools.

NOTICE

Failure to follow RPM and feed rate guide- lines will put undue strain on moving parts, shorten tool life, and create poor workpiece results.

G3358 Milling/Drilling Machine

Graduated Dials

The graduated dials on the handwheels for the table and fine feed can be indexed or “zeroed” to help make accurate and convenient movements. Each dial can be reset or locked with the set screw or thumbscrew provided.

Example:

Suppose you want to drill a series of holes in a workpiece at 0.625" centers. After locating the first hole’s placement and drilling, you can set the dial of the appropriate axis to zero while holding the handwheel. Move the table 0.625". Drill the next hole and proceed as above (Figure 30).

Graduated Dial

Thumb
Screw	Handwheel

Figure 30. Setting dial indicators to zero.

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