Woolf Aircraft stocks elbows in standard sizes up to 5 1/2" outside diameter in stainless, aluminum, and mild steel. Special materials used can be stainless grades 316 and 321, Inconel, and aluminum types 5052 and 3003. Normally the centerline radius is a multiple of the tube outside diameter. They are referred to as 1D (one times the outside diameter), 2D, 3D. A tight bend is 1D for 90 degree bends and 1 1/2D for 180 degree bends, standard is 2D, and wide is 3D or more. However, actual bend dies in-house will determine the specific bend radius used.
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90 Degree Bend Angle, 1.375 Outside Diameter, and 1.500 Centerline Radius Mild Steel Bent Elbow

90 Degree Bend Angle, 0.750 Inch (in) Outside Diameter, and 1.000 Inch (in) Centerline Radius Mild Steel Bent Elbow
List Price $20.00
90 Degree Bend Angle, 1.375 Outside Diameter, and 1.500 Centerline Radius Mild Steel Bent Elbow

90 Degree Bend Angle, 1.000 Inch (in) Outside Diameter, and 1.000 Inch (in) Centerline Radius Mild Steel Bent Elbow
List Price $21.75
45 Degree Bend Angle, 1.750 Outside Diameter, and 1.750 Centerline Radius Mild Steel Bent Elbow

45 Degree Bend Angle, 1.250 Inch (in) Outside Diameter, and 1.250 Inch (in) Centerline Radius Mild Steel Bent Elbow
List Price $20.25
90 Degree Bend Angle, 1.375 Outside Diameter, and 1.500 Centerline Radius Mild Steel Bent Elbow

90 Degree Bend Angle, 1.250 Inch (in) Outside Diameter, and 1.250 Inch (in) Centerline Radius Mild Steel Bent Elbow
List Price $25.25
90 Degree Bend Angle, 1.375 Outside Diameter, and 1.500 Centerline Radius Mild Steel Bent Elbow

90 Degree Bend Angle, 1.375 Inch (in) Outside Diameter, and 1.500 Inch (in) Centerline Radius Mild Steel Bent Elbow
List Price $26.00
Outside Diameter
N/A 0.750 in N/A 1.000 in N/A 1.250 in N/A 1.250 in N/A 1.375 in
Wall Thickness
N/A 0.065 in
Bend Angle
N/A 90 º N/A 90 º N/A 45 º N/A 90 º N/A 90 º
Centerline Radius
N/A 1.000 in N/A 1.000 in N/A 1.250 in N/A 1.250 in N/A 1.500 in
Radius Type N/A TIGHT
Material N/A Mild Steel
Type N/A Mild Steel 1010