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Punch is made for a specific material thickness
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PROGRESSIVE STIFFENING RIB |
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ELECTRICAL KNOCK OUT TOOLS |
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E.K.O. QUAD (4) |
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E.K.O TRIPLE (3) |
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E.K.O. DOUBLE (2) |
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E.K.O. SINGLE (1) |
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Tonnage Requirements: Up to 3/4 of press capacity may be safely used. Use the below to calculate tonnage required for your knockout size and material. (ref. Page 7 for Ton-Per Sq. Inch) Perimeter or 3.14XØ X Mat’l thickness X Mat’l Ton-Per-Sq.Inch MS=25(22.5mm) AL=9.5-14(8-12,6mm) SST=50(45mm) Example: 1” Pipe=1.375 actual size, in 12ga. Galvanized/mild steel 3.14 X 1.375 X .105 X 25=11.33 English tons. |
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RETURN TO FORMS DIRECTORY |
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NEXT PAGE |
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CE TOOLING ELECTRICAL KNOCK OUT |
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Standard |
“A” |
“B” |
“R” |
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Size |
3/8 |
3/16 |
3/16 |
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Con-duit |
Actual Size |
Con-duit |
Actual Size |
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1/2 |
.875 |
1½ |
2.000 |
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3/4 |
1.125 |
2” |
2.500 |
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1” |
1.375 |
2½ |
3.000 |
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1¼ |
1.750 |
3” |
3.625 |
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E.K.O. TAB LOCATION “Common Use Chart” |
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Actual Size Diameter |
SINGLE E.K.O. |
DOUBLE E.K.O. |
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Lower |
Upper |
Lower |
Upper |
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0-.249 * (0-6,3mm *) |
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.250-.313 (6,4-8,0mm) |
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.3140-1.374 (8,0-34,9mm) |
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1.374 –Max.(34,9mm–Max.) |
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* Must have tab on lower & Upper if thicker than 16 gauge. Thinner materials only need tab on Upper. |
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