Spi 15-138-1 Shore a Hardness Calibration Test Block Kit

Product Description

The SPI 15-138-1 is a seven-piece Shore A hardness calibration test block kit designed to verify and calibrate durometer instruments across the full practical range of the Shore A scale. Each block in the set represents a discrete hardness reference point, spanning from 30 HA through 90 HA, giving technicians a reliable reference standard for incoming inspection, lab calibration routines, and field verification of durometer gauges. The blocks are compact at 2 inches long by 2 inches wide by 0.285 inches high, making them easy to handle and store. This kit is used by quality control technicians, metrology lab personnel, and materials testing professionals who need traceable hardness references for rubber, elastomer, and soft polymer testing.

Shore A hardness calibration blocks are used wherever durometer accuracy must be confirmed before or after testing soft materials. Typical applications include rubber goods manufacturing, gasket and seal production, polymer compounding labs, and incoming material inspection stations. The 30 HA to 90 HA range covers the majority of elastomers and flexible compounds encountered in industrial and manufacturing environments. The seven-piece format allows interval verification across the scale rather than single-point checks, supporting more thorough instrument qualification procedures.

Key Features

• Seven discrete reference blocks covering 30 HA to 90 HA on the Shore A scale
• Compact block dimensions: 2 inches long, 2 inches wide, 0.285 inches high
• Designed for durometer calibration and verification across the Shore A range
• Supports interval calibration checks rather than single-point verification
• Suitable for lab, production floor, and incoming inspection use

Compatibility

Designed for use with Shore A durometers and durometer calibration stands that accept standard flat reference test blocks. No specific instrument model compatibility was stated in the product data.

Installation Notes

Calibration test blocks should be handled and stored per the instrument manufacturer and applicable metrology guidelines to avoid surface damage that could affect readings. Keep block surfaces clean and free of debris before each use. Blocks should be conditioned at the test environment temperature before taking reference readings. Calibration activities should be performed by qualified metrology or quality control personnel following your facility's documented calibration procedure.