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Frequently Asked Questions
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1. What is metal spinning?
2. What are the advantages of metal spinning over stamping and deep drawing?
3. What limitations are associated with the metal spinning process?
4. What shapes can metal spinning produce?
5. What are the typical tolerances that can be achieved with metal spinning?
6. Why are parts spun on CNC machines superior to parts spun manually?
7. Why should I contract Wenzel Metal Spinning, Inc. to do my parts?
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1. What is metal spinning?
Metal spinning is a “cold worked” metal forming process in which sheet metal is formed over a rotating mandrel. It is an “age old art” that has been practiced manually for centuries. Today’s modern CNC technology has made it possible to produce high volume, close tolerance, concentric metal parts quickly and economically.
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2. What are the advantages of metal spinning over stamping and deep drawing?
CNC technology has allowed metal spinning to become highly competitive with stamping and deep drawing process. Advantages include: flexible production, rapid tooling at low costs, tooling modifications, short set-up times and better material yields due to the cold-work hardening of materials.
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3. What limitations are associated with the metal spinning process?
The metal spinning process is limited to concentric shapes. Since “part specific” tooling must be produced, it is usually not economically feasible to produce extremely low volumes of parts that will not repeat. However, Wenzel Metal Spinning, Inc. does utilize some materials that make some prototypes practical. The determining factor for extremely low volumes (under 9 pieces) is usually if the part will repeat at some point in the future.
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4. What shapes can metal spinning produce?
The most common shapes are hollow dished, conical, hemispherical and elliptical shapes. However, compound shapes such as cylindrical / conical are also easily accomplished. Edge configurations that include beads and hems are also easily accomplished with metal spinning. (See our DESIGN page for more information)
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5. What are the typical tolerances that can be achieved with metal spinning?
Typical tolerances for manual metal spinning are +/- 1/16”, although with proper gauges tighter tolerances can be achieved on some dimensions. Typical tolerances for CNC spinning are +/- 1/32” or less depending upon the part and the particular dimension in question. In most cases CNC lathes can produce tolerances that rival stamping and deep drawing processes but not machining tolerances. . (See our DESIGN page for more information)
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6. Why are parts spun on CNC machines superior to parts spun manually?
The primary improvement is consistency from part to part. Each part is made with multiple tool passes. CNC technology insures that the same passes are made on each part. Improvements in the finish of the parts are also evident because pressures can be regulated and controlled. As discussed above tolerances are also significantly tighter in parts spun on CNC lathes
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7. Why should I contract Wenzel Metal Spinning, Inc. to do my parts?
Wenzel Metal Spinning, Inc. has been a leading producer of spun metal parts since 1982. We have satisfied literally hundreds of customers over the past twenty years. We have two locations, and we have more modern CNC controlled spinning lathes than any custom metal spinning company in the USA. Our production staff is very knowledgeable and well trained. All we do is custom work. Our emphasis is on customer service. We will spin your parts to specification and we will spin them on time. We have a 24 hour turn-around time on most inquiries.
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