The equipment of Sinorock's anchor bolt

25/gen/2016 07.44.49 sinorockzqq Contatta l'autore

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The equipment of Sinorock's anchor bolt

The sacrificial drill bit is the most crucial part of the anchoring system and is responsible for the productivity of the installation.Sinorock offers a large range of drill bits to suit the changing geology encountered during projects. In order to improve on performance and cost efficiency, data is collected from projects around the world and incorporated into the design with the goal to improve penetration rate and bit quality and to reduce manufacturing and application costs.

The selection of drill bits 

A successful installation of the self drilling anchor system depends on the selection of the most suitable drill bit. Compared to conventional drill bit types offered globally for maximum standing performance for rock or soil, the criteria for SDA drill bits are defined by consideration of the following factors:

1High quality for a limited service life 2Installed Sinorock SDA length 3Geology4 Geometry 

Hollow anchor rods 

The anchor rod features a hollow bore for flushing, or simultaneous drilling and grouting, and has a left-hand thread for connection to standard drill tooling. It is manufactured from API standard thick wall steel tubing, cold rolled to a standard ISO rope thread profile. The rolling process refines the crystaline structure of the steel, increasing the yield strength, and producing a durable drill rod suitable for a wide range of applications. The standard rope thread of the anchor rod produces an excellent bond between the rod and grout, as well as enabling connection to all Sinorock drilling rigs and a wide range of drill steel accessories. 

Extension couplings 

The coupling features a patented design that enables direct endto-end energy transmission between each bar, reducing losses and ensuring maximum percussive energy at the drill bit. To enable the correct seating of each bar within the coupler, all bars are chamfered with precision to enable the bar ends to have face-to-face contact.

Bearing plates 

The bearing plates are forged steel plates with a center hole, allowing articulation of seven degrees in all directions. All functional parts are constantly tested, in line with Sinorock’s rigorous quality assurance policy. 

drill bit
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