Hollow core Rock Bolt R25N

All Thread,High Strength Hollow Bar Anchor Bolt

Installation guide of the Rock Anchor Bolt:

Product Description:

• 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 

• 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




R25N	Outside diameter ( mm)	Average internal diameter ( mm)	Aver.cross sectional area  (mm2)	Ultimate load capacity ( kN )	Yield load capacity ( kN )	Average tensile strength Rm ( N/ mm2 )	Average yield strength  Rp0,2 ( N/ mm2 )	Weight        (kg/m)
	25	15	267	200	150	750	580	2.1
	We can supply products according to your requirements




Why choose us?













• 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.




Company Information:

• 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 




Certifications:



Customize service:







Custom process:






Packaging & Shipping:



Generally: 50 pcs Hollow Rock Bolt / bunndle,outer with woven bags or as requirement.




Application of Self Drilling Rock Bolts:



NATM Tunneling Engineering