KNOWLEDGE
N.T. Ruddock offers a plethora of knowledge to keep you informed.
STEEL SHOT
The Effect Of Abrasive Size On Impact And Coverage
| Shot Size Pellets Per Round Realtive Impact Value |
| 780 8,000 800 |
| 660 14,000 500 |
| 550 26,000 300 |
| 460 45,000 165 |
| 390 65,000 100 |
| 330 110,000 60 |
| 280 210,000 36 |
| 230 360,000 22 |
| 170 520,000 12 |
| 110 1,700,000 5 |
| 70 6,000,000 1 |
Relative Impact Values
From S-780 to S-280:
Adjacent Sizes (660 vs 550, 390 vs 330, etc.)
Larger Size – Two Thirds More Impact
Smaller Size – Half As Much Impact
Two Sizes Apart (660 vs 460, 390 vs 280, etc.)
Larger Size – Three Times More Impact
Smaller Size – One Third As Much Impact
From S-230 to S-70:
230 vs 170 – 230 Has 80% More Impact
230 vs 110 – 230 Has Four Times More Impact
170 vs 110 – 170 Has 2-1/2 Times More Impact
170 vs 70 – 170 Has 12 Times More Impact
110 vs 70 – 110 Has 5 Times More Impact
AIRBLAST INFORMATION
AIR REQUIRMENTS
| Nozzle | Size of Orifice | Volume of Air | Plus Helmet | Plus 50% (reserve) | Minimum Air Required |
| No. 4 | 1/4″ 6.5mm | 81 2.3 | 20 0.5 | 50 1.4 | 151 cfm 4.2 m3/min |
| No. 5 | 5/16″ 8.0mm | 137 3.9 | 20 0.5 | 79 2.2 | 236 cfm 6.6m3/min |
| No.6 | 3/8″ 9.5mm | 196 5.5 | 20 0.5 | 108 3.0 | 324 cfm 9.0 m3/min |
| No. 7 | 7/16″ 11.0mm | 254 7.2 | 20 0.5 | 137 3.9 | 411 cfm 11.6 m3/min |
| No. 8 | 1/2″ 12.5mm | 338 9.6 | 20 0.5 | 179 5.0 | 537 cfm 16.1 m3/min |
N.T. Ruddock Company
26123 Broadway Ave.
Cleveland, OH 44146
Hours of operation:
8am – 5pm Monday -Friday
Or by appointment
