A tensioner typically consists of five core components:
Ratchet Mechanism: Cast from high-strength alloy steel, the interior houses precision-machined pawls and gears. As the handle is moved back and forth, a unidirectional locking structure ensures that tension accumulates with every stroke without any recoil.
Webbing System: Constructed from a blended weave of polyester fiber and nylon, the webbing typically measures 50–75 mm in width, with a breaking strength that generally exceeds 5,000 kg.
Hook Assembly: The hooks-made of heat-treated alloy steel-feature a parabolic design. According to laboratory tests published on the "163" website, this structure ensures uniform stress distribution, boosting load-bearing capacity by 40% compared to traditional right-angle hooks.
Tension Regulator: An internal spring-steel leaf works in conjunction with a pressure sensor; certain high-end models are capable of displaying real-time tension readings with an accuracy margin of ±2 kg.
Safety Locking Device: This dual-redundancy structure incorporates both a primary locking tongue and a secondary safety latch. As demonstrated in field tests conducted by users on the platform "Zhihu," this design is capable of withstanding sudden impact loads reaching up to 150% of the device's rated capacity.
