TAC Rockford Precision Ceramic Master Cylinders are designed for verifying perpendicularity and straightness of critical machine axes on high-precision machine tools and Coordinate Measuring Machines (CMMs).

Manufactured from premium alumina ceramic, these cylinders provide exceptional dimensional stability and thermal resistance.

Key Benefits:

-Superior Wear Resistance
High-purity alumina ceramic offers significantly greater wear resistance than conventional materials, ensuring long service life and consistent performance.

-Exceptional Rigidity
The material's high modulus of elasticity minimizes deflection, maintaining excellent straightness and geometric accuracy.

Engineered for demanding metrology applications, TAC Precision Ceramic Master Cylinders deliver the accuracy and stability required for advanced calibration and inspection.

Master Rectangular Square, Ceramic

TAC Rockford ceramic squares provide a stable, durable, and highly accurate reference for precise squareness verification. Made from premium ceramic, they are non-magnetic, corrosion-resistant, and boast excellent thermal stability. Upgrade your quality control process with these lightweight and easy-to-handle precision tools.

<b>Additional product information can be found on the Details tab below.</b>

Carrying Cases for Ceramic and Granite Squares

Protect your master squares from the bumps and grit of the manufacturing environment. Built with custom-milled high-density foam and available in Baltic Birch or heavy-duty shells, TAC Rockford cases keep granite and ceramic squares secure and clean. They provide reliable storage for your most sensitive alignment tools. Contact us if you need custom foam pockets to fit your specific setup or extra accessories.

Master Cylindrical Square (Granite)

TAC Rockford Precision Granite Master Cylinders are the standard for verifying the perpendicularity, straightness, and runout of critical machine axes on high-precision machine tools and CMMs. Manufactured from select, high-density black granite, these cylinders offer unmatched dimensional stability and thermal inertness, making them essential for the most demanding metrology applications.


Standard sizes range from 200mm (7.87in) to 800mm (31.5") in height. Custom diameters, heights, and other special versions available upon request
- contact our engineering team for specialized configurations.

Master Cylindrical Square (Steel)

TAC Rockford's Precision Master Cylinders are essential tools designed to serve as a reliable reference for verifying the perpendicularity and straightness on critical machine axes on high-precision machine tools and Coordinate Measuring Machines (CMMs).


Key Features:

-High Precision Standard: Engineered to provide an accurate and repeatable datum for rigorous machine verification and calibration.

-Durable Construction: Built for sustained use in demanding industrial environments.
-Versatile Sizing: Available in a range of standard dimensions to suit various machine envelopes and gauging requirements.

Master Triangular Square, Granite

Improve and verify machine tool accuracy with our high-precision Master Tri Squares. Manufactured to ISO 8512-2 standards, these laboratory-grade squares feature lapped measuring faces for superior flatness and perpendicularity. Available in Grade 000 and custom sizes.

Master Rectangular Square, Granite

Improve and verify machine tool accuracy with our high-precision Granite Squares. Manufactured to ISO 8512-2 standards, these laboratory-grade squares feature lapped measuring faces for superior perpendicularity and parallelism. Available in Grade 00 and custom sizes.

Precision Measuring Cylinders

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<a href="https://tacrockford.com/product/gauges/machine-center-dimensional/master-cylinders/">This product series has been replaced by series 451.CS0. Please follow this link.</a>
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Square Springs

We are your specialists in the manufacturing of square springs for industrial use. Our standard springs are made of 1.4310 material with a wire thickness of 1.0 mm. Other materials and thickness values are available at request.

HSK-A Great Power Collet Chucks

For tools with Plain cylindrical straight shank. Balanced according to ISO 1940-1 up to 10,000 rpm. Available for HSK-A 63, 80, 100.