Measuring Gauge Block 20 mm INSIZE 4101-B20 Class 1

INSIZE measuring gauge block 20 mm model 4101-B20 Class 1 is a precision rectangular reference block designed to provide a stable 20 mm length standard for dimensional calibration and inspection tasks. Manufactured to a Class 1 tolerance, this gauge block is intended for use in workshops and laboratories where accurate length transfer and verification of measuring instruments are required. The block is suitable for setting and checking calipers, micrometers, height gauges and inspection fixtures, and can be combined with other gauge blocks for stepwise length assembly.

Advantages

The 20 mm INSIZE gauge block offers a reliable reference length with consistent surface flatness and hardness appropriate for repeated calibration work. Its Class 1 accuracy ensures predictable measurement performance when comparing and adjusting portable and bench measuring equipment. The block’s compact form factor and stable material properties provide ease of handling, storage and combination with other precision blocks without adding extraneous error to measurements.

Suitable for

• Setting and checking calipers and micrometers
• Verifying height gauges and inspection fixtures
• Length transfer and assembly of gauge block stacks
• Workshop and laboratory calibration tasks

Key specifications

• Nominal length: 20 mm
• Accuracy class: Class 1 tolerance (precision grade)
• Shape: rectangular gauge block
• Typical use environment: workshop and laboratory measurement

How to use

Handle the gauge block with clean, dry hands or gloves to avoid transferring oils and contaminants to the measuring surfaces. Before use, clean contact faces with a lint-free cloth or approved cleaning solvent. For single-block checks, place the block between the measuring faces of the instrument and apply consistent measuring force as recommended by the instrument manufacturer. For building a stack, wring the block faces together using light rotational motion to ensure consistent contact and minimal air gaps. After measurement, remove the block, clean surfaces if necessary and store it in its protective case to preserve accuracy.

Usage recommendations

Use the gauge block within the ambient temperature range of the measuring environment and allow it to acclimate to local temperature before precision checks. Avoid exposing the block to corrosive environments, impacts or prolonged contact with moisture. Regularly inspect and maintain clean contact surfaces and follow laboratory or workshop calibration intervals to ensure continued measurement reliability.