Screw machines have come a long way since their early origins in Switzerland, evolving into highly advanced systems capable of producing complex turned components with unmatched efficiency. These machines are specifically designed to handle high-volume production of round, square, or hex bar stock — making them essential in the manufacturing of precise, consistent parts across a wide range of industries.
At Cass Precision Machining, we’ve preserved and perfected the craft of screw machining — a skill that has become increasingly rare in modern manufacturing. While many have moved away from this traditional method, we’ve continued to invest in screw machine technology and talent to deliver exceptional results. For the right volume profile, screw machining remains one of the most cost-effective and efficient methods for producing high-quality, close-tolerance parts.
Cass Screw Machining Services
As a leading screw machining shop in Minneapolis, MN, Cass operates more than 60 automatic screw machines, producing over 10 million parts annually. Our facility is equipped to handle projects of all sizes, with a particular strength in medium- to high-volume runs that demand consistency, speed, and precision.
Our screw machining shop can process a wide variety of materials. This includes cold-rolled carbon steels, alloys, aluminum, brass, bronze, some series of stainless steels, tubing, and selected plastics.
Screw machines can fully produce a wide range of custom build-to-print parts. This includes bolts, spacers, pins, bushing, nuts, fasteners, and many more with features ranging from simple to complex.
Every day, our expert teams turn out thousands of parts with speed, accuracy, and care that are shipped on time and to spec. Whether you’re sourcing a long-term production partner or need a reliable solution for a specialized part, Cass Precision Machining has the experience, equipment, and capacity to meet your needs.
New Britain and Acme Screw Machines
We have over 40 New Britain and Acme automatic, multi-spindle screw machines, all equipped with bar feeders. The multi-spindle feature on these screw machines supports high-volume parts production and provides high part-per-hour output rates. The result is high-quality screw machine parts at globally competitive price points.
Typical production releases start at 1,000 pieces with orders ranging as high as hundreds of thousands of screw machine parts. These multi-spindle screw machines in our shop can handle bar stock material ranging from .187 inch (4.765 mm) up to 3.5 inch (88.9 mm) diameters. From a part geometry perspective, the overall length of parts starts at .030 inches (.762mm) and runs up to 4.0 inches (101.6 mm). Although material selection will impact the tolerances that we can hold on this screw machining equipment, standard tolerances for these machines are +/- .005 inches (.127 mm). Depending on the material selected, +/- .002 inches (.050 mm) can be achieved.
Brown & Sharpe Screw Machines
Cass Precision Machining also operates over 15 single-spindle Brown & Sharpe automatic screw machines. These screw machines feed single bars at a time. While they can run similar parts to our multi-spindle equipment, they are geared for lower-volume orders and faster changeovers. Most of the screw machines in this area are equipped with Servo-Cam technology. This facilitates the automation of certain aspects of set-up and changeover work.
This equipment can handle the full range of materials noted above and is our preferred processing area for tubing. Bar diameters range from .125 inches (3.175 mm) up to 2 inches (50.8 mm). When end work on one or both ends is exclusively required, Cass can provide part lengths as high as six feet. Standard tolerances on these machines are +/- .005 inches (.127 mm), however, depending on the material selected, +/- .002 inches (.050 mm) can be achieved.
Contact us to learn more about our screw machining services.
Cass produces
an average of
Over 10 million
screw machine parts
per year
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