High-quality precision-ground steel bars since 1970, tight tolerances, and nationwide shipping.
We Take Pride In Providing High-Quality Steel Bars Since 1970.
Precision Ground Bars
8150 W 111th St Ste 14, Palos Hills, IL 60465
Precision Ground Bars is a trusted precision ground bar Chicago supplier. We have served aerospace, automotive, medical, and industrial manufacturers since 1970. We supply precision-ground bar stock and centerless grinding services that shops depend on for consistent, tight-tolerance bars across every grade we stock.
Our facility in Chicago, IL carries stainless steel, alloy steel, carbon steel bar, aluminum round bar, nickel alloys, titanium, brass, copper, and bronze. Every grade is available in a wide range of sizes and lengths. We keep your production moving on every order.
We offer centerless grinding services Chicago manufacturers across multiple industries depend on for tight tolerance bar stock delivered ready for production.

We supply pump shaft quality bars for pump, motor, and fluid power applications. Every bar is ground to precise diameter tolerances and strict straightness requirements. Tensile strength holds at 100 KSI minimum, and yield strength at 75 KSI minimum on every order.

We supply medical stainless steel bar grades, including 304, 316, 317, and 2205 duplex. These grades serve surgical instruments, dental implants, and biomedical devices. Every bar is ground to the precise tolerances and smooth finishes that medical machining demands.

Alloy steel bar grades we carry include 4130, 4140/4142, 41L42, 8620, and 86L20. These grades serve aerospace, automotive, and high-load industrial applications. High strength, hardenability, and wear resistance make them the right fit where performance under load matters most.

Carbon steel bar stock grades, including 1018, 1045, 1117, 1144, 1215, 12L14, and 11L17, are available ground and ready to ship. Carbon steel is cost-effective and machines consistently. It's a practical option for general manufacturing and screw machine applications.

We supply alloy steel and aluminum for automotive applications across car manufacturing, heavy-duty trucks, and racing vehicles. These grades cover engine blocks, gears, axles, and other precision components. Lightweight and high strength make them the right choice for automotive production.
Precision-ground bar stock is ground to a consistent size and shape. That makes it easier to use across aerospace, automotive, industrial, and medical applications. As a trusted ground bar supplier since 1970, we deliver stainless steel round bar, carbon steel bar, alloy steel, and specialty grades that manufacturers depend on.
Precision-ground round bar is widely used in the manufacture of gears, bearings, ball bearings, and machine screws. It serves industrial applications across automotive, aerospace, and fabricated metal manufacturing. We stock stainless steel grades 304, 316, 317, and 2205 duplex for surgical instruments, dental implants, and biomedical devices where sterilization compatibility and corrosion resistance are non-negotiable.
Tool steel bar stock grades, including O1, A2, D2, and M2, serve cutting tools, dies, and molds. Hardness and wear resistance determine performance in every tooling application. Pump shaft quality bar grades are ground to tensile strength of 100 KSI minimum and yield strength of 75 KSI minimum, so your pump shafts run true on every production run.
Precision Ground Bars delivers ground bar machining across stainless steel grades 303, 304/304L, 316/316L, 410, 416, 420, 430, 440, 455, 13-8, 15-5 PH, 17-4 PH, Nitronic 60, Duplex, and A286. Carbon steel bar grades include 1018, 1045, 1117, 1144, 1144 Stressproof, 1215, 12L14, and 11L17.
Alloy steel grades include 4130, 4140/4142, 41L42, 8620, and 86L20. We also stock Inconel 625, Monel 400, 360 brass, 642 bronze, copper alloy 110, and 145 tellurium copper. Every grade moves through our centerless grinding and bar processing operation, ground and ready to ship to your production floor.
Stainless Steel Round Bar
Carbon Steel Bar Stock
Alloy Steel Bar
Tool Steel Bar Stock
Aerospace Steel Bar
Medical Stainless Steel Bar