High Tensile Left Right Thread LR Type Rebar Coupler For Quick Construction Connection

Different from standard single-direction thread coupler, LR type is equipped with left-hand thread at one end and right-hand thread at another end. Rotate the sleeve alone to pull two rebars inward and lock tightly without moving steel bars, solving installation difficulty in pre-fixed embedded steel bar conditions.

Size: from 12mm to 40mm

Meet the requirements of steel bars: HRB500/B500B/SD600/ASTM 75

Standard: BS4449, ISO15835,ACI318

Couplers with right-hand and left-hand threads allow bidirectional tightening without rotating rebars, enabling fast on-site installation. They feature stable force transmission, high connection strength, reliable performance, and are widely used for rebar splicing in construction.

▍Advantage:

• Allows two rebars to be connected without rotation, suitable for confined spaces.

• Fast and easy installation, greatly improves construction efficiency.

• Stable connection strength, meets mechanical performance requirements.

• Wide applicability for various rebar diameters.

• Safe and reliable, no loose connection under stress.

▍ Production & Quality Control

Raw steel undergoes material test before machining. Specialized thread equipment ensures accurate opposite thread pitch. Random tensile testing is implemented batch by batch to guarantee connection strength beyond base rebar requirement.

▍Packing & Delivery

Standard items packed in export cartons, bulk goods on fumigated pallets. In-stock goods ship within 3-5 working days, non-standard sizes accept OEM customization.

▍Application & Installation Position

• For the steel bars fixed at both ends: the longitudinal bars of beams and slabs. The upper and lower longitudinal bars of beams have been extended into the supports and cannot rotate. Therefore, positive and negative thread coupler must be used.

• For the parts where one end of the steel bars is fixed, such as the main bars of columns and the bars of walls, which have been fixed by pouring concrete at one end, only positive and negative thread coupler can be used.

• In areas where steel bars are densely packed and cannot be rotated, such as the core area of beam-column joints, the steel bars in dark columns and coupling beams of shear walls are too dense for hands and wrenches to rotate. Positive and negative thread coupler are the most convenient.

• For steel bars that need to be of a fixed length and position, such as components with precise length requirements that cannot be stretched or contracted, and the steel bars near expansion joints and settlement joints, the coupler can be tightened without changing the length of the steel bars.

▍FAQ

1.Can LR coupler be customized with galvanized or epoxy coating?

Yes, anti-rust surface treatment is available on customer demand.

2.Is every common rebar size in stock?

Regular Φ12-40mm specifications are ready for prompt delivery.

3.Can it pass third-party engineering acceptance test?

All LR couplers meet international construction standards and pass third-party tensile inspection.