A rebar tier machine is a handheld, battery-operated power tool that automatically wraps and twists wire around intersecting steel reinforcement bars (rebars), significantly speeding up the construction process and reducing manual labor. Key Details and Mechanism Automation: When the user places the machine's jaw over the intersection of rebars and pulls the trigger, the device automatically feeds a specific length of tie wire, wraps it around the bars, twists the ends to secure the tie, and cuts the excess wire, all in about half a second. Power Source: Most modern rebar tiers are powered by rechargeable lithium-ion batteries, which offer portability and allow for thousands of ties per single charge. Wire Usage: The machines use specialized spools of annealed steel wire, typically 0.8mm (21 gauge) in diameter, in various finishes like black annealed or galvanized. Ergonomics: The design of the tool allows for one-handed operation and reduces the repetitive wrist and hand motions associated with manual tying using pliers, which helps prevent musculoskeletal injuries and back strain from prolonged stooping. Efficiency: Using a rebar tier machine is typically 3 to 5 times faster than manual tying, leading to increased productivity and shorter project timelines. Applications Rebar tying machines are widely used across the construction industry for various applications where steel reinforcement is needed, including: Foundations and pile foundations Concrete slabs and floor heating mesh Beams, columns, and ladders in civil building Bridges and subways