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3 Ungapped cores
Even with the best grinding methods available today, a certain degree of roughness (approx. 6 mkm)
cannot be avoided on the ground surface in the case of „ungapped“ cores.
The AL value tolerance of E, ER, ETD, EC, EFD and EV cores is + 30/– 20 %. The small E cores
E5, E6,3 and E8,8 made of T38, however, have a tolerance of + 40/– 30 %. E cores made of T42
(E13, E16) have a tolerance of ± 30%.
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E-mail: 
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