Air Force General Purpose Eddy Current Standard

Per: U.S.A.F. T.O. 33B-1-1

Figures 4-47 through 4-49 Eddy Current Standard, NSN 6635-01-092-5129, P/N 7947479-10

The common standard used to perform Eddy Current inspections on Aluminum components within the Air Force unless otherwise specified by the cognizant weapon system engineering authority.

The standard is a 3 plate assembly measuring 4" x 7" x 1.06". Contains 20 fastener holes, with diameters ranging from .156" to .750"., 2 screw holes, and 2 dowel holes. There are 66 E.D.M. notches in various locations. Notch depths and lengths vary. Widths for all notches is .004".

Normally supplied in 7075-T6 ALUMINUM, also available in 4340 Steel, 304 Stainless Steel, 6/4 Titanium,  and other materials.

Bolt Hole Calibration Blocks

Most common material is 7075-T6 Aluminum. Many other materials also available.

Specify thickness, hold diameter, and overall dimensions.

DC-10 McDonnell Douglas Reference Standard

Contains 10 different E.D.M. nothces.

Standard materials are: 4340 Steel and 7075 T06 Aluminum.

Standard Eddy Current 8-20-40

Block Dimensions: .312" thick x 1.375" wide x 3.156" long

Contains 3 .006" wide slots at depths of .008", .020" and .040".

Standard materials are: 7075-T6 Aluminum, 4340 Steel, 6AL/4V Titanium, 304 Stainless Steel, AZ-31 B Magnesium. Other materials available.