Caliper 150 mm, 0.02 mm graduation, No name model 530-122

Precision vernier caliper with a 150 mm measuring range and 0.02 mm graduation for accurate linear measurements of external and internal dimensions and depths. The compact handheld design provides direct readings for workshop use, hobby projects and light industrial quality control. Constructed for straightforward operation, this caliper is suitable where fine resolution and repeatable results are required.

Advantages

The instrument offers a 150 mm range combined with a 0.02 mm graduation, enabling fine measurement resolution without electronic components. Its vernier scale provides reliable direct readings and minimal maintenance. The compact, lightweight construction makes it easy to handle and store, while hardened measuring jaws ensure stable contact and consistent results during repeated use.

Suitable for

• Workshop dimension checks and part inspection
• Hobbyist projects such as model building and precision crafts
• Light industrial measurement tasks and production sampling
• Measuring internal diameters, external dimensions and depths

Key specifications

• Measuring range: 0–150 mm
• Resolution: 0.02 mm (vernier graduation)
• Measurement functions: external, internal and depth measurements
• Scale type: vernier (mechanical)
• Material: stainless or hardened steel jaws with a metal beam (body)
• Design: compact handheld caliper for manual reading

How to use

Before measuring, ensure the jaws are clean and the zero position is correct by closing the jaws gently and verifying the vernier alignment. For external measurements, place the object between the outer jaws and slide the movable jaw until it contacts the part without excessive force; read the main scale and vernier alignment to determine the value. For internal measurements, use the inner jaws and expand them until they contact the internal surfaces. For depth measurements, extend the depth rod into the feature and read the scale. Keep movements steady and avoid twisting the caliper during measurement to maintain accuracy.

Usage recommendations

Store the caliper in a dry, dust-free place and avoid exposure to corrosive chemicals. Clean measuring faces with a soft cloth before and after use and apply a light protective oil film if the tool will be stored for extended periods. Handle with care to prevent impacts that could affect the vernier alignment; periodic verification against gauge blocks or a calibrated standard is recommended for critical applications.