The SDA coupler connects hollow bars end-to-end, allowing direct energy transfer from the drill hammer to the drill bit.

It ensures efficient drilling, secure load transfer, and seamless installation in Self-Drilling Anchor systems.

Application Areas

SDA Coupler

Technical Data

Extension Couplings	Diameter	Length	Basic Thread Size	Ultimate Load	Tensile Load	Weight
R25N	36 mm	130 mm	21.8*1.5/12.7 mm	> 200 kN	> 150 kN	0.60 kg/pcs
R25S	36 mm	150 mm	21.8*1.5/12.7 mm	> 250 kN	> 190 kN	0.70 kg/pcs
R32N	42 mm	150 mm	28.4*1.5/12.7 mm	> 280 kN	> 230 kN	0.70 kg/pcs
R32S	42 mm	160 mm	28.4*1.5/12.7 mm	> 360 kN	> 280 kN	0.75 kg/pcs
R38N	51 mm	180 mm	35*1.5/12.7 mm	> 500 kN	> 400 kN	1.30 kg/pcs
R38S	51 mm	200 mm	35*1.5/12.7 mm	> 550 kN	> 450 kN	1.43 kg/pcs
R51L	63 mm	200 mm	47*1.5/12.7 mm	> 550 kN	> 450 kN	2.20 kg/pcs
R51N	63 mm	220 mm	47*1.5/12.7 mm	> 800 kN	> 630 kN	2.40 kg/pcs

Extension Couplings	Diameter	Length	Basic Thread Size	Ultimate Load	Tensile Load	Weight
T30	42 mm	105 mm	26*2.2/13.2 mm	> 320 kN	> 260 kN	0.60 kg/pcs
T40	57 mm	160 mm	37*2.2/13.2 mm	> 660 kN	> 525 kN	1.70 kg/pcs
T52	68 mm	180 mm	49.5*1.5/13.2 mm	> 930 kN	> 730 kN	2.20 kg/pcs

Extension Couplings	Diameter	Length	Basic Thread Size	Ultimate Load	Tensile Load	Weight
T76L	97 mm	160 mm	70*3.1/12.7 mm	> 1200 kN	> 1000 kN	3.80 kg/pcs
T76N	97 mm	180 mm	70*3.1/12.7 mm	> 1600 kN	> 1200 kN	4.25 kg/pcs
T76M	97 mm	200 mm	70*3.1/12.7 mm	> 1700 kN	> 1300 kN	4.70 kg/pcs
T76S	97 mm	220 mm	70*3.1/12.7 mm	> 1900 kN	> 1500 kN	5.20 kg/pcs
T103L	125 mm	220 mm	96*3.1/12.7 mm	> 2300 kN	> 1800 kN	7.75 kg/pcs
T103N	133 mm	260 mm	96*3.1/12.7 mm	> 2500 kN	> 2000 kN	11.55 kg/pcs
T103S	145 mm	260 mm	96*3.1/12.7 mm	> 3700 kN	> 2600 kN	17.50 kg/pcs
T111L	140 mm	250 mm		> 2640 kN	> 2000 kN	11.50 kg/pcs
T111N	140 mm	250 mm		> 3650 kN	> 2750 kN	11.50 kg/pcs

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