Caliper INSIZE 7110-300 — metal vernier caliper L=300 mm (8")

INSIZE 7110-300 metal vernier caliper is a precision measuring tool with a 300 mm measuring range. Designed for external, internal and depth measurements, this caliper uses a vernier scale for direct, mechanical readout without batteries. The metal construction provides durability for workshop and industrial environments while maintaining measurement accuracy for routine inspection and assembly tasks.

Advantages

The caliper features a robust metal frame and hardened jaws that resist wear and maintain consistent contact surfaces for repeatable measurements. Its vernier scale delivers clear, incremental readings for fine resolution and the fixed main scale allows stable positioning during measurements. The compact slide and thumb screw enable controlled movement and locking of the jaws for secure measurement capture.

Suitable for

• External diameter and length measurements of machined parts
• Internal bore and groove size checks
• Depth measurements of slots and holes
• Routine quality control and visual inspection tasks in workshops
• Mechanical assembly and adjustment where linear accuracy to 300 mm is required

Key specifications

• Measuring range: 0–300 mm
• Scale type: vernier (mechanical) readout
• Measuring functions: external, internal, depth
• Material: metal construction with hardened measuring faces
• Locking mechanism: thumb screw for slide fixation
• Resolution: vernier-scale resolution suitable for standard workshop precision

How to use

Place the caliper's jaws around or inside the object to be measured depending on the required function (external, internal or depth). Slide the movable jaw until it contacts the workpiece and secure the position with the thumb screw if needed. Read the main scale and vernier scale alignment to determine the measurement value. For depth measurements, extend the depth blade into the feature and read the scales in the same manner. Keep contact surfaces clean and free of debris to ensure accurate readings.

Usage recommendations

Store the caliper in a protective case when not in use and avoid exposure to heavy impacts or corrosive environments. Regularly clean and lightly lubricate the sliding surfaces and check jaw faces for wear. Use the thumb screw to lock measurements when transferring values and avoid applying excessive force on the jaws to preserve calibration and extend service life.