M42 HSS Cobalt Precision Ground Round Bar 1-9mm Diameter HRC68-70 h7 Tool Steel

M42 HSS Cobalt Precision Ground Round Bar

Elevate your tool-making and metalworking projects with our high-quality M42 HSS Cobalt Precision Ground Round Bars. Designed for professionals who demand precision and durability, these bars are perfect for custom tool fabrication and other demanding applications.

Key Features:

  • Material Composition: Crafted from M42 High-Speed Steel (HSS) Cobalt, renowned for its exceptional hardness and heat resistance.
  • Hardness Rating: Achieves a remarkable Rockwell Hardness of HRC 68-70, ensuring longevity and performance under extreme conditions.
  • Surface Finish: Precision ground to meet h7 tolerances, providing an exceptionally smooth surface that enhances machining efficiency and accuracy.

Specifications:

  • Diameter Range: Available in diameters ranging from 1mm to 9mm to suit a variety of project requirements.
  • Finish Quality: H7 tolerance ensures high-quality finish with tight dimensional control for precision applications.

Applications:

  • Ideal for manufacturing custom cutting tools, dies, and other specialized metalworking instruments.
  • Suitable for use in demanding environments where heat resistance and durability are critical.

Benefits:

  • Enhanced Performance: The combination of cobalt content and precise grinding maximizes tool life and reduces wear during operation.
  • Versatility: Available in multiple diameters to accommodate diverse project needs, from intricate detailing to robust industrial applications.
  • Precision Engineering: The h7 tolerance ensures that each bar meets stringent quality standards for uniformity and precision.

Why Choose Our M42 HSS Cobalt Round Bars?

Investing in our high-quality round bars means choosing reliability and performance. Whether you're a seasoned engineer or an artisan seeking top-tier materials, these bars provide the foundation needed to achieve exceptional results in your projects.

  • Trustworthy Quality: Backed by rigorous manufacturing standards.
  • Optimal Material Properties: Perfect for challenging applications requiring superior hardness and resilience.
  • Tailored Dimensions: Catering to specific project demands with a wide range of diameters.

Enhance your tool-making capabilities today with our M42 HSS Cobalt Precision Ground Round Bars. Choose quality, precision, and performance that stand the test of time.

Product Name: M42 HSS Cobalt Round Bar  

Material: M42 High Speed Steel (HSS)

Co (cobalt): 8%

Diameter: 1mm to 9mm 

Length: 100mm

Diameter Tolerance: ±0.01–0.02 mm

Length Tolerance: ±0.1 mm

Hardness: HRC68-70

Please select your size & quantity from the drop down lists above.

This is single batch measurement data for reference only; please refer to the actual item.

Key Applications

M42 HSS is specifically designed for demanding, high-speed, heavy-duty cutting applications, with its core applications centred on the high-end cutting tool and precision mould sectors:

Metal-cutting tools: Drills, milling cutters, taps, broaches, gear hobs, gear shapers and reamers for difficult-to-machine materials such as stainless steel, titanium alloys, superalloys and ultra-high-strength steel. Particularly suited to continuous and intermittent cutting on high-speed CNC machining centres, offering a tool life 5 to 8 times longer than standard high-speed steel.

Cold-forming dies and forming tools: Cold heading dies, cold punches, heading dies, thread plates, precision stamping dies, high-strength screw forming dies, etc., suitable for cold-forming applications requiring high wear resistance and high impact resistance.

Other high-end applications: High-temperature, wear-resistant components for the aerospace sector; high-hardness, wear-resistant parts for precision instruments; high-end surgical instruments for medical devices; high-end saw blades, etc.

Notes:

**Bulk orders qualify for maximum discounts. Customisation is available. For alternative sizes, please contact us for a quotation. Thank you.**

** Please note the images are for illustrative purposes only. These are not mixed packs **

** Please allow small errors due to manual measurement. Thank you for your understanding.** 

**Due to shooting, lighting, and environmental factors, the actual product color may differ slightly from the picture. Please refer to the received product. Thank you for your understanding.**

 

 

 Package include: According to your choice. 

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On 04-May-2026 at 16:17:34 BST, seller added the following information:

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