Handheld pneumatic cap screwing machine Widely applicable for opening or tightening screw caps on any thread; compatible with bottles of all heights and a capping diameter range of 1050 mm. Adjustable speed and torque: Multiple speed gears and adjustable torque to prevent cap damage and reduce internal wear during operation. Ergonomic design: Compact straight handle for comfortable use and reduced fatigue during longterm work. Easy operation: Onekey start switch for simple on/off control; easy assembly and suitable for semiautomatic assembly lines. Use scenarios Beverage bottling lines that require fast capping across bottles of different heights and cap sizes. Cosmetic and pharmaceutical packaging where controlled torque prevents overtightening while ensuring proper seal. Smallscale production or lab environments that benefit from semiautomatic capping to boost throughput and operator comfort.