| Graded Core Ranges |
% Deviation from nominal turns |
Grade Stamped on core 1% Grading |
| +8 to +7 +7 to +6 +6 to +5 |
-4 to -3.5 -3.5 to -3 -3 to -2.5 |
+8 +7 +6 |
| +5 to +4 +4 to +3 +3 to +2 |
-2.5 to -2 -2 to -1.5 -1.5 to -1 |
+5 +4 +3 |
| +2 to +1 +1 to 0 0 to -1 |
-1 to -0.5 -0.5 to 0 0 to +0.5 |
+2 +1 -1 |
| -1 to -2 -2 to -3 -3 to -4 |
+0.5 to +1 +1 to +1.5 +1.5 to +2 |
-2 -3 -4 |
| -4 to -5 -5 to -6 -6 to -7 -7 to -8 |
+2 to +2.5 +2.5 to +3 +3 to +3.5 +3.5 to +4 |
-5 -6 -7 -8 |
Each and every Arnold Powder Toroid Core is graded, sorted, marked with a part number, lot number, and grade. Toroids are graded from +8% to -8% in 1% increments and can be ordered in any grade range. Each individual part is traceable back to individual batches of raw materials.
ISO 9001-2000 Certified
ISO 9001-2000 Certified