| If 6 tables don't fit one page... |
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You need to adjust your printing scale:
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Although there is a program for calculating spindles speeds according to diameter and material, I found it handy to produce a chart that can be stuck up in the workshop. Using the form below you can generate a chart for your lathes set of spindle speeds.
I have attempted to force a page break after 6 material tables, and I have tested the printout in
Firefox 3 and IE 7. Both produce readable output in portrait mode on an HP laser printer with up to 14 rpm entries.
You need to enter the speeds your lathe can do below.
Enter the speeds in RPM, one per line, no blank lines, numbers only, no text.
| example: ML7 speeds are | example: Super 7 speeds are |
35
62
110
200
357
640
|
27 39 54 77 95 135 210 300 420 600 740 1050 1480 2105 |
| Material | HSS | Carbide |
|---|---|---|
| Copper | 60-80 sfm | |
| Aluminum | 300-800 sfm | 1000-2000 sfm |
| hard Bronze | 65-130 sfm | 200-400 sfm |
| Brass + Soft Bronze | 200-400 sfm | 500-800 sfm |
| Med Carb Steel | 50-80 sfm | 225-400 sfm |
| Low Carb Steel | 80-150 sfm | 300-600 sfm |
| Stainless Steel | 30-80 sfm | 100-300 sfm |
| High Carb Steel | 40-70 sfm | 150-250 sfm |
| Malleable Cast Iron | 80-90 sfm | |
| Gray Cast Iron | 50-80 sfm | 250-350 sfm |
| Medium Cast Iron | 70-100 sfm | |
| Soft Cast Iron | 100-150 sfm | |
| Hard Cast Iron | 40-60 sfm | |
| Plastic | 200-3300 sfm |
Note: the plastic cutting rate figures are tentative, I will try to refine the values shortly
For more comprehensive calculations see
http://www.custompartnet.com/calculator/milling-speed-and-feed
http://en.wikipedia.org/wiki/Spindle_speed
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Thou shalt not take the name of the LORD thy God in vain; for the LORD will not hold him guiltless that taketh his name in vain.
Exodus 20:7
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