Medium, Large, & Heavy Part Machining
Where Precision Meets PerformanceAt IMF, we specialize in heavy part machining for a broad range of industrial applications. Our ISO 9001:2015-certified facility in South Bend, Indiana, is equipped with advanced CNC machines built to handle large, complex components with the accuracy your project demands. From initial engineering drawings and CAD models to finished custom components, we hold tight tolerances across every operation.
Machining Capabilities Built for Large, Heavy Metal Part
Large heavy metal machining requires equipment and expertise that most job shops simply don't have. Our machining centers cover vertical milling, 5-axis machining, CNC turning, and Blanchard grinding, giving us the flexibility to take on demanding geometries and high-volume runs. Each process is suited to different part characteristics, and our team will recommend the right approach based on your specifications.
Our vertical machining centers (VMCs) are particularly effective for large-part milling and drilling, where gravity assists chip evacuation and open top access simplifies setup changes. For parts requiring complex contours or multi-face operations, our 5-axis machining reduces setups and improves geometric consistency. CNC turning handles cylindrical components with precision, with access to Blanchard grinding through our vendors, performed with a cylindrical grinder and magnetic chuck, efficiently produces flat, parallel surfaces on large workpieces, including castings, stampings, and forgings.
Materials We Machine
We work across a full range of ferrous and nonferrous metals, including carbon steel grades such as A36, A514, and A572, alloy steels including 4140 and 4340, and multiple stainless steel grades. Whether your application calls for wear-resistant AR400 or AR500, we have the material knowledge and machining capability to produce accurate, repeatable parts. Visit our materials page to see the full list of metals we stock and machine.
Machining Tomorrows Innovations
Frequently Asked Questions
What is considered a "heavy part" in CNC machining?
In the machining industry, heavy parts are workpieces that exceed the capacity of standard machining centers, typically weighing several hundred pounds or more and extending into several tons. These parts require machines with larger work envelopes, higher spindle torques, and more rigid fixturing. The specific threshold varies by shop and equipment, so it's worth contacting us directly with your part dimensions and weight.
How do you hold tolerances on very large or heavy workpieces?
Large, heavy workpieces are more prone to deflection and thermal expansion during machining. Controlling tolerances requires rigid fixturing, appropriate cutting parameters, and, in many cases, staged machining with intermediate measurement checks. Our machinists are trained to account for these variables, and our ISO 9001:2015 quality management system backs them up.
Can you machine parts that have already been welded or fabricated?
Yes. We regularly machine parts post-fabrication, including weldments that require face milling, drilling, or bore finishing after welding. Because we also offer in-house fabrication and welding, we can manage the full production sequence under one roof, which reduces handling, shortens lead times, and improves dimensional consistency between operations.
Service Is Our Salesman
Established in 1964
At Industrial Metal Fab, we live by the motto "Service is our Salesman." Meeting customer expectations for quality and delivery is not just a goal—it’s our top priority. We understand that your success is our success, and we are committed to seeking out every opportunity to prove our dedication to you.
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