Roofing and Cladding » Cranking » Cranking Machine

Cranking of a profiled sheet incorporates lateral rib indentations pressed in at an uniform distance of 25 mm. Standard cranking are made with the narrow flute uppermost and the bend away from the angular inclination. Reverse cranking are made with the bend into the narrow flute. Cranking of a sheet can be at the end of a sheet or at any position along the length.
Cranking  radii ranging from 350 mm to 800 mm for cranking which are bent through 0 - 135 degrees, larger radii will be classified as a curve. The maximum sheet length which can be cranked  is 15 m, with a maximum height of 2 m. The minimum runout from the cranking is 30 mm on one side with a minimum of 500 mm on the other side of the sheet. It is important to clearly identify the critical end of the cranking in order to ensure that consistent lengths are supplied to the customer.
The maximum height of centre and off-centre cranks which can be manufactured is 2 m with a limitation of 10 m total sheet length. These limitations are due to handling and transport limitations. High tensile material can only be cranked to a minimum radius of 450 mm.
 

PROFILE EXAMPLES