Salform metal forming machinery
   Machine Tools for Metal Forming & Metal Working!
Salform.com
Salform.com Tables of minimum radii of curved edges in different flange heights and sheet metal thicknesses for the Erco Model HD Former and Flanger.
Salamon Industries
Salamon Industries
MINIMUM RADII OF CURVED EDGES IN DIFFERENT FLANGE HEIGHTS
Aluminum Alloy-2024-0
Formed before heat treatment
HEIGHT OF CURVED FLANGE Min. Thick-
ness
Min Bend Radii Min. Curve Radii Max. Thick-
ness
Min. Bend Radii Min. Curve Radii
1/4 .020 1/32 3 .051 1/16 4
5/16 .020 1/32 3 .064 1/16 5
3/8 .032 1/32 4 .072 3/32 6
7/16 .032 1/32 5 .081 3/32 7 1/2
1/2 .032 1/32 6 .091 1/8 9
9/16 .032 1/32 8 .102 1/8 10 1/2
5/8 .032 1/32 9 .125 1/8 12
3/4 .040 1/32 11 .125 3/16 15
7/8 .040 1/16 13 .156 3/16 17
1 .040 1/16 16 .188 1/4 19
1 1/8 .062 1/16 19 .188 1/4 22
1 1/4 .062 1/16 22 .188 1/4 25
1 3/8 .091 1/8 25 .188 1/4 27
1 1/2 .091 1/8 28 .188 1/4 35
Aluminum Alloy-2024-T3
 
HEIGHT OF CURVED FLANGE Min. Thick-
ness
Min Bend Radii Min. Curve Radii Max. Thick-
ness
Min. Bend Radii Min. Curve Radii
1/4 .020 1/16 6 .040 5/32 6
5/16 .020 1/16 7 .040 5/32 7
3/8 .031 3/32 8 .051 3/16 9
7/16 .031 3/32 9 .051 3/16 11
1/2 .031 3/32 10 .064 1/4 13
9/16 .031 3/32 13 .064 1/4 16
5/8 .031 3/32 17 .064 1/4 19
3/4 .040 1/8 24 .064 1/4 25
7/8 .040 1/8 30 .064 1/4 27
1 .040 1/8 32 .064 1/4 34
1 1/8 .064 1/4 36 .064 1/4 36
1 1/4 .064 1/4 38 .064 1/4 38
1 3/8 .064 1/4 44 .064 1/4 44
1 1/2 .064 1/4 46 .064 1/4 46
Mild sheet Metal-Low Carbon
Monel Sheets-Annealed
HEIGHT OF CURVED FLANGE Min. Thick-
ness
Min Bend Radii Min. Curve Radii Max. Thick-
ness
Min. Bend Radii Min. Curve Radii
1/4 .025 1/32 3 .050 1/16 3
5/16 .031 1/32 3 .062 3/32 3 1/2
3/8 .031 1/32 3 .070 3/32 4
7/16 .031 1/32 4 .087 3/32 7
1/2 .031 1/32 5 .099 1/8 8
9/16 .049 3/64 7 .109 1/8 10
5/8 .049 3/64 8 .109 1/8 11
3/4 .049 3/64 11 .109 1/8 14
7/8 .062 1/16 13 .109 1/8 17
1 .062 1/16 16 .109 1/8 20
1 1/8 .062 1/16 19 .109 1/8 23
1 1/4 .062 1/16 24 .109 1/8 26
1 3/8 .062 1/16 27 .109 1/8 29
1 1/2 .062 1/16 31 .109 1/8 32
Stainless Steel
Type 302 or 309
HEIGHT OF CURVED FLANGE Min. Thick-
ness
Min Bend Radii Min. Curve Radii Max. Thick-
ness
Min. Bend Radii Min. Curve Radii
1/4 .025 3/64 3 .050 1/16 6
5/16 .031 3/64 4 .062 5/64 7 1/2
3/8 .031 3/64 5 .062 5/64 9
7/16 .031 3/64 6 .078 5/64 10 1/2
1/2 .031 3/64 8 .078 5/64 12
9/16 .049 1/16 7 .078 5/64 13
5/8 .049 1/16 8 .078 5/64 15
3/4 .049 1/16 12 .078 5/64 19
7/8 .049 1/16 16 .078 5/64 21
1 .049 1/16 19 .078 5/64 23
1 1/8 .062 5/64 23 .078 5/64 25
1 1/4 .062 5/64 25 .078 5/64 28
1 3/8 .062 5/64 28 .078 5/64 32
1 1/2 .062 5/64 32 .078 5/64 38

MINIMUM BEND RADII
IN DIFFERENT METAL THICKNESSES


Metal Thickness
2024-0
Aluminum

Formed before
heat treatment
2024-T3
Aluminum
& Similar
Alloys
Mild Steel
Low Carbon
Monel Sheets
Annealed
Stainless Steel
Type 302 or 309
.020 - .029 1/32 1/16 1/32 1/32
.030 - .039 1/32 3/32 1/32 3/64
.040 - .049 1/16 1/8 1/16 1/16
.050 - .059 1/16 3/16 1/16 1/16
.060 - .069 1/16 1/4 3/32 5/64
.070 - .079 3/32 -- 3/32 5/64
.080 - .089 3/32 -- 3/32 --
.090 - .099 1/8 -- 1/8 --
.100 - .109 1/8 -- 1/8 --
.110 - .119 1/8 -- -- --
.120 - .199 1/8 -- -- --
.130 - .139 5/32 -- -- --
.140 - .149 3/16 -- -- --
.150 - .159 3/16 -- -- --
.160 - .169 7/32 -- -- --
.170 - .179 7/32 -- -- --
.180 - .189 1/4 -- -- --

Overview  | Applications  | Operation  | Bend Tables  |

Toll Free
(800) 646-7584

info@salform.com
Salamon Industries
Salform.com Salform.com
©2017 Salform.com All rights reserved