Boeing 747 - Page 63

EDM NOTCH - 0.25 (6.3) LONG X 0.040 (1.02) DEEP;
X.X = ± 0.020(0.5)
SURFACE FINISH: 63 RA OR BETTER IS NECESSARY
AT THE END OF THE HEAT TIME, REMOVE THE PART FROM THE
OR IN A SALT BATH OF EQUAL TEMPERATURE FOR 25 MINUTES.
C
2
2
NDT4109
1
1
3
3
A
(5.1)
0.20
A-A
1
3
2
ETCH OR STEEL STAMP THE STEP IDENTIFICATION LETTER AS SHOWN
ETCH OR STEEL STAMP THE REFERENCE STANDARD PART NUMBER NDT4109 AS SHOWN
- MAXIMUM WIDTH = 0.030 (0.76)
TOLERANCE:
X = ± 0.5
X.X
= ± 0.25
X.XX
= ± 0.1
X.XX = ± 0.010(0.25)
X.XXX = ± 0.005(0.13)
INCHES
ALL DIMENSIONS ARE IN INCHES (MILLIMETERS ARE IN PARENTHESES)
MATERIAL: 4330M OR 4340M STEEL BAR. THIS MATERIAL MUST BE NORMALIZED.
2.
1.
HEAT IN A FURNACE AT 1650 DEGREES FAHRENHEIT FOR 35 MINUTES
DECREASE TO AMBIENT.
FURNACE (OR SALT BATH) AND LET THE TEMPERATURE OF THE PART
TO NORMALIZE, FOLLOW THESE STEPS:
NOTES:______
B B
A
A
B
D
(90.4)
3.56
(82.5)
3.25
(19.0)
0.75
EDM NOTCH
1.5 (38.0)
(19.0)
0.75
B-B
______ MILLIMETERS___________
2131048 S0000459178_V1
Reference Standard NDT4109
Figure 2
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-08
Page 7
Nov 15/2015D6-7170
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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