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STANDARD BEND RADII FOR 90 ° COLD FORMING FLAT SHEET (CONTD) | Up
TM-43-0106 Aerospace Metals - General Data and Usage Factors Manual | Next
TABLE A-18. BEND SET BACK CHART |
T.O. 1-1A-9
TABLE A-17. METAL BENDING AND BEND RADII BEND ALLOWANCES SHEET METAL BEND
ALLOWANCES PER DEGREE OF BEND ALUMINUM ALLOYS
Example: To determine bend allowance
Given: Stock = 0.064 aluminum alloy. Bend Radius = 1/8, Bend Angle - 50°
Find bend allowance for 1° in column for 0.064 Aluminum opposite 1/8 in column "Bend Radius".
Multiply this bend allowance (0.00268 in this case) by the number of degrees of the desired bend angle:
0.00268 x 50 = 0.1340 = total bend allowance to be added to the length of the straight
sides of the part to determine the total length of the material needed.
A-18
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