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Boart Long Year Hardness Referenceneptune11242018-12-11T09:01:27+00:00

  • Series Bit Selection Table

  • Hardness Selection

  • Series Bit Selection Table

  • Hardness Selection

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  • Mohs’ scale of Hardness
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Matrix Hardness

  • Matrix Height
  • Matrix Hardness Selection
  • Other Brand Hardness Selection
  • Matrix Wear Profile Analysis
  • How To Select Suitable Matrix Profiles？

Influence factors

  • Influence factors of rotary speed
  • Influence factors of flushing water
  • Influence factors of drilling pressure

Contact Us

Changsha Drilling Machinery CO., LTD 
159# Li Xiang East Road, Changsha, Hunan, China. Post Code 410100
Tel: 0086-731-84077805.
Fax: 0086-731-84072772
Cell/whatsapp/wechat: 0086-13808464920
Email: csdrillingtools@vip.126.com

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