| CFM x 183.4 | Litres/Sec x 76404.7 |
| Bit Dia. Inches2 - Rod Dia. Inches2 | Bit Dia. mm2 - Rod Dia. mm2 |
| Example: | Example: | ||
|
600 (CFM) x 183.4 6.125 x 6.125 - 4.5 x 4.5 |
283 (L/Sec) x 76404.7 155.58 x 155.58 - 114.3 x 114.3 |
||
|
110,000 37.52 - 20.25 |
21,622,530.1 24,205.14 - 13,064.49 |
||
|
110,000 17.27 |
21,622,530 11,141 |
||
| 6,369 Annular Velocity (Ft/Min.) | 1941 Annular Velocity (M/Min.) |
When surplus air volume is available, the hammer can be fine tuned by the use of the interchangeable choke located in the end of the feed tube. The table below shows the additional flow through the orifice (choke).
| Flow (CFM) Through an Orifice (Choke) | Flow (Litres/Sec) Through an Orifice (Choke) | |||||||||||
| Inches | Millimeters | |||||||||||
| 1/8 | 3/16 | 1/4 | 3/8 | 1/2 | 3 | 5 | 6 | 9 | 13 | |||
| 100 PSI | 18 | 41 | 73 | 163 | 291 | 6.9 Bar | 9 | 19 | 35 | 77 | 137 | |
| 150 PSI | 26 | 59 | 104 | 235 | 417 | 10.3 Bar | 12 | 28 | 49 | 110 | 197 | |
| 200 PSI | 34 | 76 | 136 | 306 | 544 | 13.8 Bar | 16 | 36 | 64 | 144 | 257 | |
| 250 PSI | 42 | 94 | 168 | 377 | 671 | 17.2 Bar | 20 | 44 | 79 | 178 | 317 | |
| 300 PSI | 50 | 112 | 199 | 449 | 797 | 20.7 Bar | 24 | 53 | 93 | 212 | 376 | |
| 350 PSI | 58 | 130 | 231 | 520 | 924 | 24.1 Bar | 27 | 61 | 109 | 246 | 436 | |