Bolt-Self-Drilling Anchor (SDA) is a bolting solution for unstable ground conditions such as sand, gravel, silt, and clays, and in soft to medium fractured rock formations. For projects facing such ground conditions, BOLT-SDA self-drilling anchors should be considered as the main productivity solution.

The basic application of Bolt SDA is for use in soil conditions where there is a risk of the drill hole collapsing due to pulling out of drill bit, as in the classical anchor installation process. The Bolt system is suitable for a variety of different rock conditions and our drill bits are available in various diameters.
The Bolt SDA system can be deployed for various simultaneous drilling and grouting purposes including:
• Slope stabilization
• Strengthening of existing retaining wall
• Foundations with micro piles
• Soil Nailing
• Face stabilization
• Temporary support anchoring

		R25	R32			R38	R51		T76
	Units	R25N	R32N	R32/18	R325	R38N	R51L	R51N	T76N	T765
Hollow Bar
Outer Diameter	Mm	25	32	32	32	38	51	51	76	76
Intermal Diameter	Mm	12	20	18	17	21	36	33	51	45
Cross-Sectional Anka	Mm 2	292	363	408	440	717	776	993	1835	2400
Ultimate Tersile Lond	kN	200	280	280	360	500	550	800	1600	1900
Yield Load	kN	150	230	230	280	400	450	630	1200	1500
Coupler
Diameter	Mm	36	42	42	42	51	63	63	95	95
Length	Mm	150	145	145	190	220	140	190	200	200
Hexagonal Nut
Key Size	Mm	41	46	46	46	50	75	75	100	100
Length	Mm	35	45	45	65	50	70	70	80	80
Bearing Plate
Dimensions	Mm	150*150	150*150	200*200	200*200	200*200	200*200	250*250	250*250	250*250
Thickness	Mm	8	8	10	12	12	30	40	40	60
Hole Diameter	Mm	30	35	35	35	41	60	60	80	80

Grade of steel - EN10083-1
Corrosion Protection Options - Epoxy coating/Hot Dip Galvanization