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Precision Steel Machined Parts

precision steel machined partMore than one million times a month Cox Manufacturing delivers a new machined custom component, including hundreds of thousands made in steel. Each individual component is produced with a focus on top productivity, and on maintaining a supply of components that never runs dry.

This assurance is backed by a half-century of experience with the cutting characteristics of hundreds of different steel alloy types, each with unique processing requirements we have mastered.

Customers turn to Cox for three important advantages that maximize adherence to tight tolerances while keeping steel machining costs fully under control.

Steel Machining Experts

  • The exceptional precision of Cox equipment, including CNC Swiss machines, multi spindle cam automatics and CNC turning centers, interfaced with an Esprit CAD/CAM system for precise conformity to the most elaborate geometries (equipment list)
  • An in-house toolmaking facility that allows greater customization of tooling to the steel in use
  • They eyes and hands of experienced machining craftsmen, who are skilled at spotting potential problem before they find their way into a production run

Cox achieves all this, plus assistance with managing delivery schedules to eliminate unexpected shortages and downtime on your production line. Explore the details with a no-obligation price quote on your next steel machining component project.

Steel Machining Characteristics

Steel Alloy 1018
  • Tolerances for a 1/2" Dia. Bar +.000/.002 (Cold drawn)
  • Material Cost Factor 0.75
  • Machining Cost Factor 3.0

Steel alloy 1018 is plain low-carbon and generally has poor machinability, but has good formability and weldability. Case harden only. Alloy 1018 is often machined into rivets and parts that require strong welds.

Steel Alloy 1215
  • Tolerances for a 1/2" Dia. Bar +.000/.002 (Cold drawn)
  • Material Cost Factor 0.95
  • Machining Cost Factor 1.5

Steel alloy 1215 is designed to increase the machinability of the steel. Case harden only. Alloy 1215 is often used to manufacture parts requiring more formability or weldability than alloy 12L14.

Steel Alloy 12L14
  • Tolerances for a 1/2" Dia. Bar +.000/.002 (Cold drawn)
  • Material Cost Factor 1.0
  • Machining Cost Factor 1.0

Steel alloy 12L14 is designed for excellent machinability. Case harden only. Alloy 12L14 can be machined for endless commercial products; probably more pounds used in turned products than any other bar stock.

Steel Alloy 1215 Bi
  • Tolerances for a 1/2" Dia. Bar +.000/.002 (Cold drawn)
  • Material Cost Factor 1.1
  • Machining Cost Factor 1.0

Steel alloy 1215 Bi is designed for excellent machinability without lead (Biadded). Case hardening only. Alloy 1215 has all the same characteristics as 12L15, it is the non-leaded replacement.

Steel Alloy 1137
  • Tolerances for a 1/2" Dia. Bar +.000/.003 (Cold drawn)
  • Material Cost Factor 1.25
  • Machining Cost Factor 2.5

Steel alloy 1137 has higher carbon content for higher strength. Direct hardening only. Alloy 1137 is typically machined for higher stress applications like gears, shafts, studs, ect.


Learn more about the material options available at Cox by choosing from the menu below. For in-depth materials data to support an engineering or product development project, consult our machining materials guide.