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Cleveland Twist Drill Q Carbide Drills— Recommended
Operating Parameters |
| Material |
Hardness (Br) |
SFM |
IPR |
| 1/4" |
3/8" |
1/2" |
3/4" |
| Plain
Carbon Steel |
150 - 225 |
250 |
.007 |
.009 |
.011 |
.014 |
| 230 - 325 |
200 |
.006 |
.008 |
.009 |
.012 |
| 330 - 425 |
140 |
.005 |
.006 |
.007 |
.009 |
| Alloyed
Steel |
150 - 225 |
225 |
.008 |
.010 |
.012 |
.016 |
| 230 - 325 |
175 |
.006 |
.008 |
.009 |
.011 |
| 330 - 425 |
100 |
.005 |
.006 |
.006 |
.009 |
| Tool
Steel |
150 - 250 |
200 |
.006 |
.008 |
.009 |
.012 |
| 255 - 375 |
140 |
.005 |
.006 |
.007 |
.009 |
| Stainless Steel |
100 - 240 |
350 |
.008 |
.010 |
.012 |
.016 |
| Free
Machining |
250 - 325 |
200 |
.007 |
.008 |
.009 |
.011 |
| 330 - 425 |
150 |
.005 |
.006 |
.007 |
.009 |
| Work
Hardening and PH |
150 - 325 |
175 |
.006 |
.008 |
.009 |
.010 |
| 330 - 375 |
120 |
.006 |
.007 |
.008 |
.009 |
| 380 - 425 |
85 |
.004 |
.005 |
.005 |
.006 |
Optimum Drill Performance Can Be Achieved
By:
Very rigid machine set up such as NC/CNC machining
centers or similar types of equipment (not recommended for manual
drill presses).
Use of richer emulsions and cutting oils are recommended.
Choosing the proper coolant delivery techniques
and/or systems.
Properly reground and recoated tools. Properly
reground tools without recoating will necessitate a reduction in
surface speed.
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