Vernier Caliper KS Tools 300.0510 0-150 mm, overall length 235 mm

The Vernier Caliper KS Tools 300.0510 0-150 mm, overall length 235 mm is a manual analogue measuring tool designed for precise linear measurements up to 150 mm. It features a vernier scale for direct reading, fixed and sliding jaws for external and internal measurements, and a depth probe to measure recesses and steps. The instrument has a metal construction intended for workshop, maintenance and hobby tasks where a reliable, mechanical caliper is preferred over electronic alternatives.

Advantages

The tool provides accurate analogue readings without batteries, offering straightforward operation and long-term reliability. Its compact overall length of 235 mm makes it convenient to handle and store while still providing a 0–150 mm measuring range. The fixed and sliding jaws are designed for secure contact with workpieces, and the depth probe extends the tool’s versatility by enabling depth and step measurements. A metal body ensures durability under regular workshop use.

Suitable for

• Measuring external dimensions of shafts, rods and components
• Measuring internal diameters of bores and openings
• Checking depths of recesses, steps and grooves
• Workshop maintenance and repair tasks
• Hobbyist and model-making measurement tasks

Key specifications

• Measuring range: 0–150 mm
• Overall length: 235 mm
• Scale type: vernier (analogue) for direct reading
• Measurement functions: external, internal and depth
• Construction: metal frame and jaws

How to use

Place the caliper jaws around or inside the object to be measured, close the sliding jaw until it contacts the workpiece without forcing, and read the value from the vernier scale aligned with the main scale. For depth measurements, extend the depth probe into the recess and read the scales in the same manner. Ensure the jaws are clean and free of debris before measuring to maintain accuracy. When not in use, return the sliding jaw to the closed position to protect the measuring faces.

Usage recommendations

Use gentle, consistent pressure when closing the sliding jaw to avoid deforming soft workpieces and to obtain repeatable readings. Periodically check calibration against a gauge block or reference standard and keep the caliper clean and lightly oiled to prevent corrosion. Handle the instrument on a stable surface and avoid impacts to preserve measurement accuracy.