Stainless Steel

Stainless Steel Precision Ground Bars

Our stainless steel precision ground bars are manufactured to tight dimensional tolerances and superior surface finishes through precision centerless grinding. Available in a wide range of stainless steel grades, they deliver exceptional corrosion resistance, straightness, and machinability for aerospace, automotive, medical, food processing, energy, and precision manufacturing applications.

Key Features:

  • Material: Typically made from stainless steel grades like:

    • 303: Excellent machinability and corrosion resistance for precision-machined components.
    • 304/304L: Outstanding corrosion resistance, weldability, and general-purpose industrial applications.
    • 316/316L: Superior corrosion resistance for marine, chemical processing, food processing, and medical environments.
    • 416: Enhanced machinability with moderate corrosion resistance for shafts and precision components.
    • 17-4 PH:High strength, hardness, and corrosion resistance for aerospace and high-performance industrial applications.

  • Precision Tolerance: These bars are ground to extremely tight tolerances, such as:

    • including h6, h7, and h8 tolerance classes, depending on application and engineering requirements.
  • Surface Finish: Produced through centerless grinding to achieve a smooth, consistent surface finish with Ra ≤ 0.2–0.8 μm, improving dimensional accuracy and machining performance. .
  • Straightness: Manufactured with excellent bar straightness and minimal runout, making these precision ground bars ideal for shafts, linear motion systems, bearings, and CNC-machined components.
  • Hardness & Strength: Mechanical properties vary by stainless steel grade and heat treatment, providing the strength, hardness, toughness, and wear resistance required for demanding industrial and precision engineering applications.

Manufacturing Process:

  • Cold Drawing: Stainless steel bars are cold drawn to achieve near-net dimensions, improved mechanical properties, and a consistent diameter before precision grinding.
  • Centerless Grinding: Precision centerless grinding refines the bar diameter, achieves tight dimensional tolerances, improves straightness, and produces a superior surface finish.
  • Polishing: Precision polishing enhances surface finish, reduces friction, improves corrosion resistance, and delivers the appearance required for demanding applications.
  • Inspection & Testing: Every precision ground stainless steel bar undergoes dimensional inspection and quality testing to verify diameter tolerances, straightness, surface finish, and mechanical properties before shipment.

Applications:

  • Shafts & Bearings: Ideal for precision shafts, bearing assemblies, and high-accuracy rotary motion applications.
  • Linear Motion Components: Used for linear shafts, guide rails, pistons, actuators, and motion control systems.
  • Medical Instruments: Suitable for surgical instruments, orthopedic implants, and precision medical devices.
  • Aerospace & Defense: Used in aircraft components and defense equipment requiring strength, durability, and corrosion resistance.
  • Precision Machining & Tooling: Ideal for CNC machining, tooling, fixtures, and precision-engineered components.
Stainless steel precision ground round bars are available in a wide range of grades, each offering distinct mechanical properties, corrosion resistance, and machining characteristics for specific engineering and manufacturing applications.

Austenitic Stainless Steel (Most Common & Corrosion-Resistant)

  • 304 / 304L – General-purpose grade with excellent corrosion resistance and weldability.
  • 316 / 316L – General-purpose grade with excellent corrosion resistance and weldability.
  • 321 – Titanium-stabilized grade for high-temperature and heat-processing applications.
  • 303 – Free-machining grade for precision components, fittings, and fasteners.
  • 310 / 310S – Heat-resistant grade for furnaces and thermal processing equipment.

Ferritic Stainless Steel (Magnetic & Good Corrosion Resistance)

  • 430 – Cost-effective grade with good corrosion resistance for appliances and architectural applications.
  • 409 – Heat-resistant ferritic grade for automotive exhaust and industrial applications.

Martensitic Stainless Steel (Hard, Wear-Resistant & Magnetic)

  • 410 – Heat-treatable grade with high strength for valves, shafts, and industrial components.
  • 420 – High-hardness grade for surgical instruments, cutting tools, and precision components.
  • 440C – High-carbon grade with exceptional hardness for bearings, tooling, and precision parts.

Duplex & Super Duplex Stainless Steel (High Strength & Corrosion Resistance)

  • 2205 Duplex – High-strength grade with excellent corrosion resistance for marine, chemical, and pressure applications.
  • 2507 Super Duplex – Superior corrosion resistance and strength for offshore and aggressive industrial environments.