Name:
Date:
Gavilan College AMT 110
Aircraft Metal Structural Repair
Bend Allowance Worksheet #4
Points: 18
1. Grain of metal is?
2. The curved section of a bend is called?
What two parameters are used to define a bend in sheet metal?
3.
4.
5. What is the location at which the metal starts to bend and the line at which the metal stops
curving?
6. The extensions of the flat side of a part beyond the radius of a bend are called?
7. What is the dimension the extensions of the flat side of a part beyond the radius of a bend?
8. What is the standard gap between the nose and the bend leaf of a bending brake?
Calculate values for a 2 sided, 90° bracket with one side 2.75” long and the other side is 3.5”
long. The bracket is made from 0.064” 6061-T5.
 Show your work.
 Accuracy should be 1/1000”.
 Determine R from AC 43.13-1B, use largest value of range round to closest 1/32” for
R.
9. MLD 1:
10. MLD 2:
11. T:
12. R:
13. BA:
14. SB:
15. BTLD 1:
16. BTLD 2:
17. TDW:
18. Brake Reference Line:
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