• Self drilling Anchor
• R /T thread
• Customized
• Simultaneous Drill and Grout Installation
• Combines both operations into a single construction cycle, enabling high rates of production
• Fully Threaded Rod Sections
• Continuous thread ensures that rods can be cut and coupled at any point
• No Casing Required
• Can be installed into loose or collapsing soils without the need for a temporary casing to support the borehole
• It's widely used in many projects of the subway, high-speed rail ,railways, Soil Nails, Micropiles ,highways and hydropower stations, with good popularity and quality.

• SDA (IBO) is a kind of safety product.
• Safe products is the most important thing of engineering safety.
• We only produce safe products.
• Security is not just lip service , SGS report ...

• Established in the early 1990s
• The first and best manufacturer of SDA ( Self-drilling Anchor Rock Bolt ) in China
• ONTON Techology Co., Ltd. is the main compiling units of the standard named "Technical Terms of Hollow Anchor Bolts" 
• We participate in the ministry of railways Self-drilling Anchor Rock Bolt standards and almost all of the high-speed railway construction in china.
• OEM accepted >>" href="http://ontonbolt.en.china.cn/company_profile.html" target="_blank"> >>>

                 CE                              ISO9001                      TÜV Rheinland               SGS

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Custom process:

Generally: 50 pcs anchor rock bolt / bunndle,outer with woven bags or as  requirement

• If you have any question of Hollow Thread Rock Bit  , please feel free to contact

• Jone Tel: 86-028-87678353

 FAQ  for  Hollow Thread Rock Bit

1.What is SDA?
Self-Drilling Anchor 
2.The application of the SDA?
Mine,tunnel,slope,foundation pit
3.What is our transportation way?
By sea,by air,by land