Special Micrometer Blade Micrometer Set

Blade micrometer set is a high-precision measuring tool primarily used to measure small gaps, hole sizes, or the thickness of thin objects. It is a specialized variant of the standard micrometer, with the key difference being that one end of the measuring screw is equipped with a thin, blade-shaped (knife-edge) measuring head. This design is specifically intended for measuring narrow gaps, thin parts, groove widths, and other applications where a standard micrometer cannot be used.

It is a high-precision measuring instrument widely used in mechanical processing and precision inspection, with a graduation value of up to 0.01 mm, while digital versions can achieve an accuracy of up to 0.001 mm. It is widely used in precision manufacturing fields such as mold making, aerospace, automotive, electronics, and blade processing.

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Matching high UPH, realising automatic cleaning of nozzle.

The blade micrometer set optimizes the probe structure of the classic outside micrometer. It features a rigid, integrated design with no detachable probes (some custom models are equipped with replaceable blades). The core components and functions are described below, and all components are made of alloy steel or carbide to ensure wear resistance and rigidity. 

Fixed sleeve: Engraved with the main scale, including millimeter (mm) and half-millimeter markings, serving as the reference for readings. The sleeve also displays the blade specifications (thickness and width).

Fixed sleeve: Engraved with the main scale, including millimeter (mm) and half-millimeter markings, serving as the reference for readings. The sleeve also displays the blade specifications (thickness and width).

Blade-shaped probe (knife-edge probe): A core specialized component featuring a thin, protruding structure. Thickness is a critical parameter (typically 0.2 mm, 0.4 mm, or 0.5 mm, with special versions as thin as 0.1 mm); width is 5–10 mm, and length is 15–30 mm. Both the end face and the sides of the probe are made of polished hard alloy to ensure scratch and wear resistance. The thin design allows easy insertion into narrow gaps or grooves, and the probe and shaft are forged as a single piece to prevent breakage of the thin tip.

Measuring ratchet (force control device): Located at the end of the micrometer, it is used to control the measuring force during measurement (standard measuring force: 3–5 N). Gently turn the ratchet until you hear 2–3 "click" sounds, then stop. This ensures consistent pressure for each measurement and prevents deformation of the measuring head or reading errors caused by excessive force

Locking mechanism: Mostly consists of an eccentric locking nut or locking lever, located at the junction of the fixed sleeve and the measuring rod. It is engaged after measurement to prevent the movable sleeve from rotating and causing reading drift.

Measuring anvil: The fixed measuring surface opposite the blade-shaped probe, made of flat hard alloy material to ensure parallelism with the probe (parallelism error ≤ 0.002 mm)

Base/scale frame: Made of cast iron or alloy steel and integrally forged to provide high rigidity and resistance to deformation, preventing bending of the scale frame during measurement and ensuring accuracy

Leaf height marking ring (available on some models): Slipped onto the measuring rod to mark the effective measurement height of the blade probe, helping to avoid errors caused by probe tilting during measurement.

Instructions for use blade micrometer set: First, select the appropriate blade according to the shape and size of the object to be measured. Then, gently insert the measuring rod into the gap to be measured, ensuring close contact with the object. Next, rotate the movable sleeve to minimize the gap between the blade and the object. Finally, read and record the measurement result using the reading device.

Application areas: Widely used in aerospace, automotive, machinery manufacturing, electronics, and other industries, it is an important tool for blade manufacturing and repair, as well as for the processing and inspection of other precision parts.