Metal Spinning Process

18 May


Metal spinning or also called as spin forming, metal turning or spinning is the process of metalworking to which a tube or disc of metal rotates at high speed and then, form into axially symmetrical part. The spinning could be done by either CNC lathe or by hand. Most of the time, the process of metal spinning involves the elimination of material in traditional metal or wood turning. On the other hand, forming or molding of sheet material is done over existing shape.

Actually, metal spinning is ranging from the artisan's specialty to the most sophisticated way of forming round metal parts primarily for commercial applications. As a matter of fact, artisans are utilizing this process as a way to generate architectural detail, decorative household goods as well as urns and specialty lighting too.

Commercial applications for metal spinning process is quite a lot and this includes rocket nose cones, cookware, gas cylinders, brass instrument bells, public waste receptacles and so forth. Fact is, any ductile metal can be formed from stainless steel, aluminum to high strength and high temperature alloy. But you should know that for the diameter and depth of the formed parts, this will be limited only to the size of equipment. Read more info!    

For the metal spinning process, it is basically simple, in the drive section of lathe, a formed block is being mounted and pre-sized metal disk will be clamped against the block with the use of pressure pad that's attached to the tailstock. The block and workpiece are rotated together at fast speeds. Local force is applied in the workpiece in order to make flow to the block. Normally, the force applied is through the use of different levered tools. Simple workpieces are being removed from block however, several blocks may be required for more complex and sophisticated shapes.

When it comes to complicated shapes, it is typically spun on ice forms that then melts after spinning. Because the final diameter of workpiece is less than the starting diameter, the workpiece ought to be thickened, buckled circumferentially and elongated radially.

When it comes to more complicated procedures, it's otherwise called as necking or reducing that allows the spun workpiece to use reentrant geometries. If the surface form and finish aren't that critical, then the workpiece is being spun on air and no mandrel has to be used. If the form or finish is hard however, it will demand eccentrically mounted mandrel.

There are metal spinning tools that are allowed on the bearings throughout the forming process. These tools are used to be able to reduce heating and friction of the tool, extend its life while also improving surface finish. To be able to extend the life of the tool, the rotating tools are coated using thin film of ceramic. For more facts about welding, visit this website at

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