Description
Product Overview
The 1×2×3 inch Parallel Metal Block Set from marddpair is a precision‑engineered collection of hardened steel gage blocks designed to meet the exacting standards of modern dimensional calibration. Each block is fabricated from high‑grade steel that has been heat‑treated and case‑hardened to achieve a Rockwell hardness range of 57 to 62 HRC, guaranteeing exceptional wear resistance and long‑term stability. The surface finish, measured between 6 and 16 microinches, ensures that every face of the block is flat, true, and free from microscopic irregularities that could compromise measurement accuracy. With a tolerance of .0001 inch on all sides, the set provides unparalleled precision for critical applications such as CNC machining, toolmaking, and quality‑control inspections. The blocks are packaged in a compact, sturdy box measuring 4.25 x 3.23 x 1.22 inches and weighing 3.42 pounds, making them easy to store, transport, and integrate into any calibration workflow. Designed for both professional engineers and dedicated hobbyists, this set offers a reliable foundation for establishing reference standards, verifying equipment performance, and maintaining the highest levels of dimensional fidelity across a wide range of industrial processes.
![[Product front view showing all components]](https://www.fabledmart.store/wp-content/uploads/2026/07/cb71b803723047faa429ab05e9576524.jpg)
Usage
In the demanding environment of a machine shop, the Parallel Metal Block Set serves as an essential tool for establishing reference dimensions and verifying the accuracy of measuring instruments. Machinists can use the blocks to set up workpiece zero points, calibrate micrometers, dial indicators, and coordinate‑measuring machines (CMMs) with confidence, knowing that the blocks themselves are within .0001 inch of true size. Quality‑control technicians rely on these blocks to perform routine checks on production tolerances, ensuring that every part leaving the line meets strict specifications. The hardened steel construction also makes the set suitable for high‑temperature environments, such as heat‑treatment facilities, where dimensional stability is critical despite thermal fluctuations. Additionally, the compact size and lightweight design allow the blocks to be easily incorporated into portable calibration kits for field service engineers who need to perform on‑site verification of equipment in automotive, aerospace, and medical device manufacturing settings. Whether used in a cleanroom laboratory, a noisy factory floor, or a remote maintenance depot, the set provides a consistent, repeatable reference that helps maintain product quality and reduce scrap rates.
Why Choose Us
Choosing the marddpair Parallel Metal Block Set means selecting a product that combines rigorous manufacturing processes with a deep understanding of the needs of precision engineers. Each block undergoes a multi‑stage heat‑treatment cycle that not only achieves the desired hardness but also minimizes internal stresses, resulting in a stable, distortion‑free component that retains its dimensions over time. The company employs state‑of‑the‑art grinding and lapping techniques to achieve the ultra‑fine surface finish of 6‑16 microinches, a level of flatness typically reserved for high‑end metrology equipment. Quality assurance is reinforced by a comprehensive inspection protocol that includes laser interferometry and coordinate measurement verification, ensuring that every block meets the .0001 inch tolerance before it leaves the factory. marddpair also provides responsive technical support, offering guidance on proper block handling, storage, and calibration procedures to help customers maximize the lifespan and performance of their tools. With a proven track record reflected in a 4‑star rating from 26 verified purchasers and a best‑seller rank within the Gage Blocks category, the set has earned the trust of professionals who demand reliability, accuracy, and durability in their measurement solutions.
Key Features
- Ultra‑precise tolerance of .0001 inch ensures reliable reference dimensions for critical calibration tasks.
- Hardened steel construction (HRC 57‑62) provides exceptional wear resistance and long‑term dimensional stability.
- Surface finish of 6‑16 microinches delivers flat, true faces that reduce measurement error and improve repeatability.
- Compact packaging and lightweight design make the set easy to store, transport, and integrate into portable calibration kits.
- Dedicated technical support and comprehensive documentation help users achieve optimal performance and maintain accuracy over the product’s lifespan.
FAQ
What is the recommended storage condition for the block set?
To maintain the dimensional accuracy of the blocks, store them in a clean, dry environment away from direct sunlight and extreme temperature fluctuations. Ideally, keep the set in its original packaging or a dedicated calibration case with a desiccant pack to prevent moisture absorption, which could lead to corrosion or surface contamination.
Can the blocks be used for temperature‑controlled calibration?
Yes, the hardened steel material is suitable for use in temperature‑controlled environments. When performing calibrations at elevated temperatures, allow the blocks to equilibrate to the ambient temperature of the measurement area before use. This practice ensures that thermal expansion does not affect the accuracy of the reference dimensions.
How often should the blocks be re‑checked for accuracy?
It is advisable to verify the blocks against a higher‑grade reference standard at least once a year, or more frequently if they are subjected to heavy use, harsh conditions, or frequent handling. Regular verification helps detect any potential wear or deformation early, allowing you to replace or re‑calibrate the blocks as needed.
Do you offer replacement parts or additional block sizes?
marddpair provides a range of additional gage block sizes and replacement components to expand your calibration toolkit. Contact our customer service team for information on compatible accessories, custom sizes, or bulk purchasing options tailored to your specific industry requirements.
Is there a warranty included with the block set?
Yes, the set comes with a limited one‑year warranty covering manufacturing defects and material failures. Should any issue arise within the warranty period, simply reach out to our support team with the purchase details, and we will arrange a repair, replacement, or refund in accordance with our warranty policy.







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