Spinning A Bell Flare Sheet Metal

Pem sfn steel spinning flare nuts install in steel stainless steel or aluminum sheets of any hardness and as thin as 1mm.

Spinning a bell flare sheet metal.

This must be removed before spinning can resume. If the oxide is not removed it will be pressed into the surface of the metal being spun. They are available in metric thread sizes m5 m6 and 8. After annealing the metal it will be coated with a black oxide.

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. Metal spinning does not involve removal of material as in conventional wood or metal turning but forming moulding of sheet. 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. Spinning can be performed by hand or by a cnc lathe.

This will make obtaining a nice finish on the completed spinning very difficult. 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.