Coupling

: http://sinodrills.org/4-2-coupling.html

The couplings are used to link anchor bars to make the anchor longer, thus promote its installation depth.

Features

Stable quality;
Thread is compatible with ISO and other international standards;
Precision-manufactured anchors with ≤ 0.25 mm tolerance;
Good mechanical performance.

Applications

Pre-supporting, micropiling for foundation underpinning, slope anchorage, etc.

Parameters

Thread size	Length(mm)	Outside diameter(mm)	Unit weight (kg)
R25	150	36	0.6
R32	145	42	0.7
	160	42	0.8
	190	42	0.9
R38	180	51	1.4
R38	220	51	1.7
R51	140	63	1.4
R51	200	63	2
T76	220	95	4.7
T30	105	38	0.42
T40	140	54	1.1
T40	140	57	1.3
T52	160	70	2.4
T73	235	89	3.7
T73	245	95	5.7
T103	255	123	7.5
T103	290	132	12.5
T127	255	139	7.5
Steel grade	As per request
Thread direction	Left hand / Right hand
Thread standard	ISO 10208 / ISO 1720/ Other international standards
Hardness (HRC)	HRC25~HRC30
Features	All are designed with middle stop , O rings are available as per request.

Industries We Serve

Our rock drilling equipment can be applied in various industries, doing rock drilling and crushing duties for digging, blasting, etc.
We mainly offer 4 series of rock drilling tools: top hammer drilling tools, down-the-hole (DTH) drilling tools, self-drilling anchor system and drag bits.

Tunnelling

Water Well，Geothermal well drilling

Quarry/Aggregate

Mining

Construction