Calipers Centrum 80977 — precision measuring tool

Centrum 80977 calipers are a handheld precision measuring tool designed for internal, external and depth measurements. The model provides straightforward manual measurement functionality for basic inspection, part fitting and simple machining tasks. Compact and portable, these calipers are intended to deliver reliable linear readings where analogue measurement accuracy and ease of use are required in workshops, classrooms and hobby environments.

Advantages

The design emphasises a clear vernier scale and a smooth sliding action to support repeatable measurements. Rugged yet lightweight construction allows comfortable handheld operation and easy transport. The instrument offers multi-function capability: measuring internal diameters, external dimensions and depths with a single tool. Its analogue mechanism requires no power source, making it ready to use at any time and suitable for locations without electrical access.

Suitable for

• General workshop inspection and quick part checks
• Hobbyist projects such as model building and woodworking
• Educational demonstrations and metrology practice
• Simple machining setups and bench fitting tasks

Key specifications

• Measurement functions: external, internal and depth
• Handheld analogue vernier operation
• Compact, portable form factor suitable for bench use
• Material: lightweight metal construction for durability
• Scale type: vernier scale for manual reading of linear dimensions

How to use

Place the fixed jaw against the object and slide the movable jaw until it contacts the measured surface for external measurements. For internal measurements, open the jaws inside the cavity and align until both inner faces contact the sides. For depth measurement, extend the depth rod into the hole or recess and read the scale at the end of the caliper body. Read the vernier scale to determine the measurement value, taking care to view the scale straight-on to minimise parallax error. Keep the jaws clean and free from debris to ensure accurate contact and consistent readings.

Usage recommendations

Store the calipers in a dry, dust-free place and avoid exposure to strong impacts or corrosive environments. Calibrate periodically against a gauge block or reference standard if precise accuracy is required. Use gentle, even pressure when closing the jaws to prevent bending or misalignment and clean measuring surfaces with a soft cloth before and after use.