For Machines Mfg. Since 8/09 | O P E R A T I O N | Model SB1021/SB1022 |
Blade Speed Chart
Use the blade speed chart in Figure 15 to determine an appropriate speed to start with, then examine the chips once you start cutting to determine which way to adjust the speed or your feed rate.
Material | Dry Cutting Speed (FPM) | ||
Thickness | 0 - 1/2" 1/2" - 1" | 1" + | |
Alloy Steel | 90 | 125 | 160 |
Aluminum | 185 | 250 | 315 |
Brass (Soft) | 375 | 500 | 625 |
Brass (Hard) | 150 | 200 | 250 |
Bronze | 150 | 200 | 250 |
Copper | 185 | 250 | 315 |
Cast Iron | 90 | 125 | 160 |
High Speed Steel | 35 | 50 | 65 |
Low Carbon Steel | 90 | 125 | 160 |
Medium Carbon Steel | 75 | 100 | 125 |
Figure 15. Dry cutting blade speed chart.
Chip Inspection Chart
The best method for evaluating the cutting speed and feed rate for an operation is to inspect the chips created by the cut. Refer to the chip inspection chart below for chip inspection guidelines.
Chip
Appearance
Chip
Description
Chip
Color
Blade Speed
Feed
Pressure
Other
Actions
| Thin & Curled | Silver | Good | Good |
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| Hard, Thick & | Brown or Blue | Increase | Decrease |
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| Short |
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| Hard, Strong & | Brown or Blue | Increase | Decrease |
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| Thick |
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| Hard, Strong & | Silver or Light | Good | Decrease | Check Blade |
| Thick | Brown | Slightly | Pitch | |
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| Hard & Thin | Silver | Increase | Decrease | Check Blade |
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| Straight & Thin | Silver | Good | Increase |
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| Powdery | Silver | Decrease | Increase |
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| Curled Tight & Thin | Silver | Good | Decrease | Check Blade |
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