Rock Bolt R38 Self Drilling Anchor Hollow Bar

The main advantages of the DSI Hollow Bar are:

Fast drilling and placing due to drilling, anchor installation and grouting in a single operation.
Neither separate anchor installation nor removal of casing and drill rods.
Similar installation methods for all ground conditions.
Choice of drill bits for different ground conditions.
The hollow core not only serves for flushing with air or water during drilling, but also for grouting the anchor tendon.
Flexibility in length by using couplers.

Description

Rock Bolt R38 Self Drilling Anchor Hollow Bar

Hollow bars are fully threaded, “disposable” drill rods capable of drilling holes utilizing sacrificial bits that will advance the drill string to the required depth and then allow them to be grouted in place. This process creates the steel reinforcing portion of an anchor or pile. Hollow bar products are a valuable and multi-functional addition to the geotechnical contractor’s toolbox. They can be used as tie back or tie down anchors, rock anchors, soil nails and micropiles in a large array of challenging applications.

Product Code Guide

Diameter	Grade	Bar Type	Length
32	S	IBO	3

Technical Data	Unit	R25N	R32L	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Outer Diameter	mm	25	32	32	32	38	51	51	76	76
Average Inner Diameter	mm	14	22	18.5	15	19	36	33	51	45
Average Cross Sectional Area	mm²	290	340	430	520	770	890	1070	1900	2500
*Ultimate Load¹**	kN	200	220	280	360	500	550	800	1600	1900
*Yield Load¹**	kN	150	180	230	280	400	450	630	1200	1500
*Average Tensile Strength¹**	N/mm²	690	650	650	690	650	620	750	840	760
*Average Tensile Strength¹**	N/mm²	520	530	530	540	520	510	590	630	600
Weight	kg/m	2.3	2.7	3.4	4.1	6.1	7.0	8.4	15.0	19.7
Thread Standard	–	ISO 10208					ISO 1720		T76*²
Steel Grade	–	Acc. to EN 10083-1
Delivery Lengths	–	1m, 2m, 3m, 4m, 6m

*¹ The ultimate load and yield load capacity are measured values. The tensile/yield strength are calculated average values. *² Internal standard

Service

The technical support team may provide remote or on-site support to resolve issues encountered by users during use.
Provide original spare parts to ensure timely replacement of worn or damaged parts to maintain the normal operation of DTH bits.
Timely information reply throughout the day, the first time to solve your problems.