Precision Grinding in Chicago for Precision Ground Bar Stock and Round Steel Bars

ISO 9001:2015 certified quality, .0001-inch tolerances, 8 micro inch finish, and nationwide shipping since 1970.

Sales Job Opening

Submit a Quote for Your Round Bar Requirments

Request a Quote

Fill out the form below and our team will get back to you shortly.

Full Name *

Company

Email Address *

Phone Number

Service Required

Message *

Request A Quote

O’Hare Precision Metals, LLC.
2404 W. Hamilton Rd. Arlington Heights, IL 60005

[Welcome]

Precision Grinding Services in Chicago for Round Bar Stock Supply Since 1970

O’Hare Precision Metals is an ISO 9001:2015 certified precision grinding Chicago supplier delivering precision ground and cold-finished round steel bars to aerospace, medical, automotive, and industrial manufacturers since 1970.

We supply precision ground bar stock that Chicago manufacturers depend on, from carbon steel and stainless steel grades to nickel alloys and titanium. Our Arlington Heights, IL facility serves the Chicago area with tolerances up to .0001 inches and 8 micro inch surface finish or better on processed bars.

[About Us]

Precision Ground Bar Stock Chicago for Industrial and Medical Manufacturers

We supply precision ground bar stock Chicago manufacturers trust, backed by in-house centerless grinding, round steel bar processing, and ISO 9001:2015 certified quality on every order.

About Us

O’Hare Precision Metals has been a trusted Chicago-area centerless grinding and precision ground bar stock supplier since 1970. We serve commercial, industrial, and medical manufacturers nationwide with consistent ISO 9001:2015 quality control through every operation

Products We Offer

We supply stainless steel, alloy steel, carbon steel, tool steel, aluminum, nickel alloys, medical steel, brass, copper, bronze, and titanium round bars to meet tight-tolerance manufacturing needs across every industry we serve.

Our Specialties

Our specialized grinding division handles bars up to 7 inches diameter and 24 feet length using in-feed grinding, thru-feed grinding, turning, polishing, heat treating, straightening, cutting, and chamfering from one facility.

In-House Capabilities

We run centerless grinding, milling, custom machining, packaging, chamfering, saw cutting, burnishing, polishing, and turning in-house under one quality inspection system from first operation through final shipment.

[Products]

Stainless Steel Round Bar and All Major Precision Ground Metal Grades

We stock, grind, and process stainless steel, alloy steel, carbon steel, tool steel, aluminum, nickel alloys, and titanium round bars from one reliable Chicago-area metal supplier.

Alloy Steel Bar

Alloy steel bar grades we carry include 4130, 4140, 41L40, 4142, 4340, 52100, 8740, and 9310. These precision ground alloy bars deliver high strength, hardenability, and wear resistance for aerospace, automotive, and oil and gas applications where load performance drives material selection.

Stainless Steel Round Bar

Our stainless steel round bar inventory covers grades 302, 303, 304, 304L, 316, 316L, 316LVM, 321, 347, 410, 416, 420, 420F, 430, 430F, 440, 440C, 446, 455, 15-5PH, and 17-4PH. These precision ground bars support food processing, marine, medical implants, and precision machining where corrosion resistance and surface finish are critical.

Carbon Steel Bar Stock

Carbon steel bar stock grades in our inventory include 1018, 1026, 1117, 11L17, 1141, 11L41, 1144, 1215, 12L14, 4140, 8620, and 86L20, ground and ready to ship. Carbon steel is a cost-effective, machinable bar stock option for general manufacturing and screw machine applications.

Tool Steel Bar Stock

Tool steel bar stock grades we stock include A2, H13, O1, O6, S7, and W1 for cutting tools, forming dies, and precision tooling applications. Each bar goes through our grinding process to preserve dimensional stability, hardness, and tight-tolerance performance.

Medical Stainless Steel Bar

We supply medical stainless steel bars in chromium-nickel alloy grades, including 303, 304, and 316 variants for surgical instruments and medical device components. Each bar is precision ground to the tight tolerances and smooth surface finishes medical machining requires.

Brass, Copper and Bronze

We carry brass, copper, and bronze round stock, including 360 brass, 110 copper, 145 tellurium copper, 673 bronze, and 954 bronze for electrical, thermal, and bearing applications. These red metals machine cleanly and hold tight tolerances through our grinding process.

[Services]

CENTERLESS GRINDING SERVICES CHICAGO AND COMPLETE BAR PROCESSING

We provide centerless grinding and bar processing services that help Chicago manufacturers hold tight tolerances and reliable production schedules.

Centerless Grinding Chicago, IL

Our centerless grinding Chicago, IL operation grinds round steel bars up to 9 inches in diameter and 50 feet in length, holding tolerances up to .0001 inches and an 8 micro inch surface finish or better. This dimensional accuracy makes our precision ground bars ideal for tight-tolerance applications across the industries we serve.

Packaging Services

We package round bars using individually wrapped tubes and collars, custom wood boxes, and paper-wrapped bundles. Every order ships protected, secure, and ready for your production floor.

Precision Grinding Services Chicago for Bar Polishing

Our precision grinding services Chicago and bar polishing operation covers stainless steel, brass, copper, bronze, titanium, and aluminum bars. Every polished bar delivers a smooth, consistent surface finish that helps prevent corrosion and meets the finish requirements of precision machining applications.

Bar Straightening Services

Bar straightening corrects alignment issues that cause runout in your machining equipment. We straighten round bars to .005 T.I.R per foot so each piece loads cleanly and performs consistently through your production run.

Chamfering Services

Chamfering services remove excess metal to create symmetrical sloping edges on bar ends for specific applications. Every chamfered bar arrives with clean, finished ends that support faster, safer machining and installation.

Steel Grinding Services Chicago for Saw Cutting

Our steel grinding services Chicago and saw cutting operation uses automated CNC saws to cut bars up to 7 inches in diameter. Cold saw blades deliver clean, precise cuts with superior surface finish and minimal waste.

[Specialties]

Pump Shaft Quality Bar and Precision Ground Bar Products in Every Grade

We supply pump shaft quality bar and precision ground bar products, including turned ground and polished bars, bearing shaft quality bars, and accuracy stock across stainless steel, alloy steel, carbon steel, tool steel, aluminum, nickel alloys, brass, copper, bronze, and titanium grades. Every bar ships ground to your required diameter, surface finish, and length from our Arlington Heights, IL facility to manufacturers nationwide.

Contact Us

Contact us at O’hare Precision Metals and get some information of the materials and precision grinding services we provide for your manufacturing process.

Address

Phone

Email

Blog

We present our useful documents and information in relevance to working with O’hare Precision Metals and some of the materials and services we provide.

Precision ground stainless steel round bars with an engineering drawing

Blog

What to Know Before You Specify X15TN Stainless Steel Round Bar

X15TN is a specialty stainless steel grade, and specifying it requires attention to the material requirements on your drawing. Less familiar grades tend to raise

October 29, 2026

Blog

430 vs 430F Stainless Steel Round Bar: What the F Means for Your Order

430 and 430F sit right next to each other on our stainless pages, and that extra letter is easy to skim past on a requisition.

October 27, 2026

Blog

Tool Steel Supplier Checklist: Grades, Finishes, and Quality Standards Manufacturers Should Consider

A tool steel order usually starts with a grade number on a print. That number is only the first line of the order, though. The

October 25, 2026