York / PK Technology FK11 Cleaver CALIBRATED

The York / PK Technology FK11 Cleaver CALIBRATED is an ultrasonic fiber cleaving tool that delivers consistently clean, flat cleaves with minimal end-angle deviation. It employs a patented anvil-less ultrasonic cleaving action using an ultrasonically vibrating diamond blade to sever fiber without compressive stress, producing mirror-quality end faces free of hackle and contamination. The instrument is calibrated for high-precision fusion splicing, termination, and fiber testing applications across telecommunications, data networking, and research environments.

Technical Specifications

• Applicable Fiber Types: Multi-mode and single-mode


• Fiber Diameter Range: 80 µm to 200 µm


• Maximum Buffer Diameter: 900 µm


• Minimum Cleave Length: 6 mm (0.23 inches)


• Cleave Angle Repeatability: Typically less than 0.6° (95% of cleaves)


• End Angle Consistency: Less than 1°


• Blade Type: Diamond, adjustable to new positions as wear occurs


• Estimated Blade Life: Over 20,000 cleaves


• Blade Life (Battery-Limited): Over 10,000 cleaves per 9V alkaline battery


• Power Source: 9V alkaline battery (MN 1604)


• Weight: 1.2 kg (2.6 lb)


• Dimensions: 150 mm × 150 mm × 68 mm (6" × 6" × 2⅔")


• Operating Temperature: 0°C to 45°C (32°F to 113°F)


• Storage Temperature: -20°C to 60°C (-4°F to 140°F)

Key Features

• Ultrasonically vibrating diamond blade mounted on resonant acoustic-stepped horn


• Integrated tensioner applies axial fiber tension prior to cleaving


• Specially designed low-torsion clamps minimize fiber distortion


• Stictionless damped bearings for reliable, repeatable operation


• Blade release lever for simple manual actuation


• Replaceable, adjustable diamond blade accommodates progressive wear


• Integrated instruction panel for field operation


• Portable compact housing; often supplied with protective case

Typical Applications

• Fiber preparation for fusion splicing


• Termination and connector installation


• Precision fiber testing and measurement


• Laboratory and field deployment in telecom and data center environments

Compatibility & Integration Supports multi-mode and single-mode fibers from 80 µm to 200 µm core diameter with buffered jackets up to 900 µm.