90° lobster back elbow flat pattern (segmented round bend)
A round 90° bend made of cylindrical segments, the two end segments half size, as used in ducting, dust extraction and large bore pipe. UK and Australian shops call it a lobster back bend, US shops a mitered or gored elbow. Choose how the seams are placed.
Round duct turned 90° by cylindrical segments, the two end segments half size.
Sizes you enter
- Diameter (D): Across the duct, on the surface chosen under Sheet.
- Centre-line radius (R): From the bend centre to the duct centre line.
- Number of segments (n): All segments, the two half end segments included.
What you get
The exact flat pattern of the part, worked out for the sheet thickness measured on the inside, the mean or the outside, with numbered press lines, the part in 3D, its weight and cutting length, and a DXF for laser, plasma or waterjet cutting (STEP as well).