Shars 1-2-3 Precision Matched .0002″ Pair Blocks w/23 Hole Set 303-5500 P]

Description

Product Overview

The Shars 1-2-3 Matched .0002″ Pair Blocks are engineered for the most demanding dimensional calibration tasks. Each block is precision‑ground to a tolerance of .0002 inches and features a verified squareness of .0003 inches, ensuring that every setup is true and repeatable. Constructed from hardened steel with a Rockwell hardness of 56‑60 RC, the blocks resist wear and maintain their geometry even after repeated use in grinding, milling, and layout operations. The included 23‑hole set (model 303-5500) provides a versatile array of tapped holes ranging from 5/8″‑11UNC, allowing quick and secure mounting of workpieces, fixtures, and accessories. With a compact package size of 7.05 x 4.8 x 1.65 inches and a weight of just one pound, the blocks are easy to transport yet robust enough for industrial environments.

Usage

These pair blocks excel in a variety of precision applications. In a machine shop, technicians use them to set up workpieces for grinding, ensuring that the part remains perfectly square to the spindle axis. In a metrology lab, the blocks serve as reference standards for calibrating V‑blocks, gauge blocks, and other measurement tools. The 23‑hole configuration accommodates a range of accessories, from clamping plates to magnetic bases, making the blocks suitable for CNC setup, jig building, and prototype assembly. Their hardened surface tolerates repeated tightening of bolts without deformation, providing confidence in long‑term accuracy for aerospace, automotive, and medical device manufacturing.

Why Choose Us

Choosing Shars means selecting a product backed by decades of experience in precision tooling. Each block undergoes a rigorous quality‑control process that includes dimensional inspection, hardness testing, and surface finish verification. The hardened steel construction guarantees resistance to chipping and deformation, while the matched pair design eliminates cumulative error when two blocks are used together. Shars also offers responsive technical support and a straightforward return policy, ensuring that any concerns are addressed promptly. With a proven track record reflected in a 4.6‑star rating from 27 verified customers, the brand delivers reliability that professionals trust.

Key Features

• Ultra‑precise .0002″ tolerance delivers reliable, repeatable setups.
• Hardness of 56‑60 RC ensures long‑term durability under heavy use.
• 23‑hole set provides flexible mounting options for diverse fixtures.
• Matched pair design eliminates cumulative error for high‑accuracy work.
• Responsive customer support and easy returns give peace of mind.

FAQ

What material are the blocks made from?

The blocks are machined from hardened steel with a Rockwell hardness of 56‑60 RC, providing excellent wear resistance and dimensional stability.

Can the blocks be used with magnetic bases?

Yes, the hardened steel surface works well with magnetic bases, and the 23‑hole set includes tapped holes that can accommodate magnetic fixtures for quick setup.

How do I verify the squareness of the blocks?

Each block is supplied with a certificate of calibration confirming a squareness of .0003″. For on‑site verification, you can use a high‑precision dial indicator or a calibrated V‑block.

Are the blocks suitable for high‑temperature environments?

The hardened steel construction tolerates typical shop temperatures, but extreme heat may affect hardness. For high‑temperature applications, consider using heat‑treated accessories.

What is the warranty period?

Shars offers a one‑year limited warranty covering manufacturing defects, along with lifetime technical support for usage questions.