Spinning A Bell Flare Sheet Metal

Metal spinning does not involve removal of material as in conventional wood or metal turning but forming moulding of sheet.

Spinning a bell flare sheet metal.

Permanent installation is accomplished by inserting the nut into a properly sized pre punched and embossed mounting hole in a metal sheet and then applying sufficient squeezing force to flare the fastener s shank. The sheet metal spinning process begins when the sheet is cut to a certain size and attached to a lathe mandrel which spins at very high rpm. They are available in metric thread sizes m5 m6 and 8. Metal spinning also known as spin forming or spinning or metal turning most commonly is a metalworking process by which a disc or tube of metal is rotated at high speed and formed into an axially symmetric part.

The sheet metal is then slowly forced with hand held tools and rollers to form over the mandrel and it slowly takes the shape of the desired part. This will make obtaining a nice finish on the completed spinning very difficult. This banner text can have markup. This must be removed before spinning can resume.

After annealing the metal it will be coated with a black oxide. Spinning can be performed by hand or by a cnc lathe.