Are U.S. Machine Shops Choosing to Stay Small for the Long Haul?
Spending plans offer a clue to the new way shops plan to expand their output.
Earlier this year, I had the chance to speak to an audience in Europe about metalworking in the United States. The point I felt it most important to make to this group was also the simplest to express. Namely, in the United States, metalworking is done in facilities that are small. Small in staffing, that is. Metalworking is distinct from the rest of U.S. manufacturing in the extent to which this is true. With the findings of our latest Capital Spending Survey, we might be seeing what comes next for those small shops: They are choosing to stay small, or else accepting they must stay small, and they are setting out to realize a different sort of bigness.
Specifically, we have found that these shops plan to invest in capability—horizontal machining centers in particular—that will let them expand their machining output without adding staff. Steven Kline of Gardner Business Intelligence (a division of the company that publishes this magazine) reports on this finding in his article, “The Shift to Horizontal Machining Centers Gathers Steam.”
Let me offer some data behind my point that metalworking is done in small shops. According to the U.S. Census Bureau, 83 percent of metalworking facilities have fewer than 20 employees. The proportion for manufacturing overall is 71 percent. That may seem like a slight difference, but when it comes to value added, the extent of the discrepancy expands. Shops smaller than 20 employees account for 26 percent of the metalworking value-added in the United States. These facilities account for 5 percent of value added in manufacturing broadly. Raise the scale to facilities with less than 50 employees, and this group makes up 53 percent of metalworking value-added versus 12 percent for manufacturing overall.
Perhaps most germane to this discussion is capital investment. Shops with fewer than 50 employees account for 60 percent of U.S. investment in metalworking technology. Small shops thus drive metalworking technology investment. The coming spending on HMCs is rising because small shops are shifting toward buying them. And their very smallness would seem to offer the most likely reason for the shift.
In the past, small shops would be expected to spend more of their limited resources on vertical machining centers, essentially getting more spindles per dollar. However, the one requirement of this approach is the need to increase skilled staffing at a rate in step with VMC purchases. Now, thanks to the difficulty many shops face in finding skilled personnel, combined with the rewards some have found in maintaining a small and highly focused staff, shops are either discouraged or disinclined to seek more employees. Instead, the investment is going instead into the kind of capital that can enable longer unattended operation, including increased use of the evening and weekend hours that likely have no staff at all.
In short, this simple fact about U.S. metalworking now seems coupled with a straightforward clue about what is to come. Namely, shops are finding the way to deliver high value despite their smallness, equipping and preparing themselves to achieve high productive capacity with few people. In the future, we might need to change our very definitions of what constitutes a shop that is small.
Different machines offer different approaches to rotary travel, and each design has its own strengths. Here's how they compare.
When this aerospace job shop settled on machining tungsten alloys and other heavy metals as its specialty, it had to have a machine tool, cutting tools, workholding and process know-how to succeed.
With so many choices in five-axis machining technology, how do you know which is best for your shop? First, consider the parts. Then, look at existing processes and potential five-axis benefits.