Electronic Iron cores standardized

All types of electronic cores made from iron powder and commonly in use by the radio and television industry have been listed in a new standard released by the Metal Powder Association. The standard was prepared by the Electronic Core Subcommittee of the Metal Powder Association Standards Committee to meet a need long felt in industry for standardization of the dimensions and tolerances of electronic cores. The standard, designated 11–51T, defines the terms commonly associated with electronic cores made from powdered magnetic materials and specifies the preferred dimensions of standard sizes and shapes. Preferred dimensions are listed in detail for plain iron cores, insert iron cores, threaded iron cores, tuning cores, and sleeve iron cores. Data are provided also for concentricity, screwdriver slot dimensions, and hexagonal hole sizes as well as threaded-spring type and spaded-insert sizes.