Introduction: The Role of Coordinate Measuring Machines in Modern Manufacturing

Coordinate Measuring Machines (CMMs) are the backbone of dimensional metrology in today’s precision-driven manufacturing landscape. Whether in aerospace, automotive, medical device fabrication, or electronics assembly, CMMs provide the high-accuracy measurements needed to ensure parts conform to tight tolerances. As production demands increase and component geometries become more complex, selecting the right CMM brand and model can directly impact product quality, inspection throughput, and overall operational efficiency.

With numerous manufacturers offering varied technologies—from traditional bridge and gantry designs to portable arms and optical scanners—the decision process can be overwhelming. This expanded review dives deep into the top CMM brands—Mitutoyo, Zeiss, Hexagon, FARO, and Brown & Sharpe—comparing their core technologies, strengths, weaknesses, and ideal use cases. We also explore key selection criteria, emerging trends, and practical advice for integrating a CMM into your quality assurance workflow.

Understanding CMM Types and Technologies

Before comparing brands, it is essential to grasp the basic types of CMMs and the measurement technologies they employ. This foundation helps contextualize each manufacturer’s specialization.

Bridge CMMs

Bridge-style CMMs are the most common configuration. The measuring probe moves along three orthogonal axes (X, Y, Z) on a rigid bridge structure. They offer excellent accuracy and stability, making them ideal for shop-floor and laboratory environments. Most major brands produce bridge models in various sizes and accuracy grades.

Gantry and Large-Format CMMs

For oversized parts—such as automotive body panels, wind turbine components, or aircraft wings—gantry CMMs provide a massive measurement volume. These systems use a moving gantry and a fixed table, allowing parts to be loaded with cranes or forklifts. Hexagon has a strong presence in this segment.

Portable CMMs and Articulated Arms

Portable CMMs, typically articulated measuring arms, bring the metrology lab to the part. They are ideal for on-site inspection, reverse engineering, and measuring large or cumbersome objects. FARO is synonymous with portable arm CMMs, though other brands offer competitive alternatives.

Optical and Laser Scanning CMMs

Non-contact CMMs use laser scanners, structured light, or vision systems to capture thousands of points per second. Zeiss excels in optical scanning technology, while Mitutoyo and Hexagon also offer hybrid contact/non-contact solutions.

Understanding these categories helps you match a brand’s product lineup to your measurement tasks. Now, let’s examine each leading manufacturer in detail.

Mitutoyo: Precision and Durability for Critical Metrology

Founded in 1934 in Japan, Mitutoyo has grown into one of the world’s largest metrology companies. Its CMMs are renowned for their mechanical stability, long-term accuracy, and comprehensive ecosystem of measurement software and accessories.

Key Product Lines

  • CRYSTA-Apex S Series – A high-accuracy bridge CMM for precision inspection in temperature-controlled labs.
  • CRYSTA-Plus M Series – A mid-range bridge CMM designed for shop-floor use with active vibration control.
  • MACH Series – Large bridge and gantry models for automotive and aerospace components.
  • CRYSTA-Data – Entry-level models suitable for small workshops and education.

Technology Highlights

Mitutoyo’s CMMs use proprietary glass scales and advanced air-bearing technology to achieve micron-level repeatability. Their MCOSMOS software platform integrates CAD-based programming, statistical process control, and automated reporting. The company also offers a wide range of touch-trigger and scanning probes, including the SP25M and TP200 systems.

Advantages

  • Excellent price-to-performance ratio for general-purpose inspection.
  • Robust mechanical build ensures consistent accuracy over years of use.
  • Strong global service network and training resources.

Limitations

  • Optical scanning capabilities are not as advanced as Zeiss or Hexagon’s dedicated scanners.
  • Portability options are limited compared to FARO.

Ideal Applications

Mitutoyo CMMs excel in automotive component manufacturing, mold and die making, and precision machining. They are a top choice for companies that require reliable daily inspection without the premium price tag of some competitors.

For more details, visit the official Mitutoyo CMM product page.

Zeiss: The Gold Standard in High-End Optical Metrology

Carl Zeiss, founded in 1846 in Germany, is synonymous with optical excellence. Its Industrial Metrology division produces CMMs that push the boundaries of accuracy and scanning speed. Zeiss is the go-to brand for industries where sub-micron tolerances are non-negotiable.

Key Product Lines

  • ZEISS PRISMO – A high-accuracy bridge CMM with active vibration damping and temperature compensation.
  • ZEISS CONTURA – A versatile multi-sensor CMM supporting tactile, optical, and laser scanning.
  • ZEISS O-INSPECT – A multi-sensor system that combines CMM accuracy with optical measurement.
  • ZEISS ACCURA II – A large-format bridge CMM with high scanning speeds.

Technology Highlights

Zeiss’s proprietary VAST (Variable Accuracy and Speed Touch) probe technology allows both high-speed scanning and ultra-precise single-point probing. The Zeiss CALYPSO software is widely regarded as one of the most intuitive for metrology programming. Their optical sensors, such as the ViScan and DotScan, enable non-contact measurement of delicate or complex surfaces.

Advantages

  • Unmatched accuracy—often the industry benchmark for calibration labs.
  • Extensive multi-sensor capability (tactile, optical, laser, CT).
  • Robust software ecosystem with strong GD&T evaluation and reporting.

Limitations

  • High initial investment and maintenance costs.
  • Less portable; most models are fixed installation.
  • May be overkill for parts with looser tolerances.

Ideal Applications

Zeiss CMMs dominate in medical device manufacturing (e.g., hip implants, stents), aerospace turbine blades, and semiconductor components. They are also essential in research institutes and national metrology laboratories.

Explore Zeiss metrology solutions at ZEISS Industrial Metrology.

Hexagon: Versatility and Software Integration Across All Scales

Hexagon Manufacturing Intelligence (formerly part of Brown & Sharpe and Leitz) offers the widest range of CMM configurations. Their focus on connected data and Industry 4.0 integration makes them a leading choice for smart factories.

Key Product Lines

  • Leitz Reference Series – Ultra-high-accuracy fixed-bridge CMMs for gauge labs and calibration.
  • Brown & Sharpe Global Series – Workhorse bridge CMMs for general manufacturing inspection.
  • Hexagon Absolute Arm – Portable articulated arm with integrated laser scanner.
  • Hexagon Gantry CMMs – Large-format machines for automotive body and heavy equipment.

Technology Highlights

Hexagon’s PC-DMIS software suite is the most widely used metrology programming language in the world. Their scanning technologies, such as the HP-O and HP-S-X5 sensors, deliver high-speed data collection. The company also offers non-contact laser line scanners (RS6) and white-light systems for complex surfaces.

Advantages

  • Broadest product range—one vendor can cover lab, shop floor, and portable needs.
  • Strong software ecosystem with CAD-to-part integration and reporting.
  • Good support for multisensor integration.

Limitations

  • Brand proliferation can be confusing (Leitz, Brown & Sharpe, Sheffield, etc.).
  • Some older models have inconsistent software compatibility.

Ideal Applications

Hexagon CMMs are used across automotive assembly lines, electronics enclosure inspection, and large-scale fabrication where multiple measurement technologies are needed under one software umbrella.

View Hexagon’s CMM portfolio at Hexagon Manufacturing Intelligence.

FARO: The Pioneer of Portable 3D Measurement

FARO Technologies, founded in 1981, revolutionized metrology with its articulated arm CMMs and laser trackers. Today, FARO remains the leader in portable metrology, known for ease of use, ruggedness, and speed.

Key Product Lines

  • FARO Quantum M Arm – High-accuracy portable arm with integrated thermal compensation.
  • FARO Edge Arm – Mid-range articulated arm with optional laser line probe.
  • FARO Gage – Compact arm for smaller parts and tight spaces.
  • FARO Vantage Laser Tracker – Large-volume metrology for assembly alignment and aerospace.

Technology Highlights

FARO arms feature patented Super 6DoF (six degrees of freedom) probe technology, allowing full rotation without losing measurement accuracy. Their CAM2 software provides intuitive CAD-based inspection and real-time 3D visualization. The integrated Blue Laser Line Probes capture detailed point clouds for reverse engineering.

Advantages

  • Excellent portability—set up in minutes on the shop floor or field.
  • Lowest cost of ownership for mobile inspection.
  • Strong reverse engineering capabilities with scanning.

Limitations

  • Lower absolute accuracy compared to fixed bridge CMMs (typically ±0.025 mm vs. ±0.002 mm).
  • Limited to moderate part sizes (unless paired with laser trackers).
  • Less suited for high-volume automated inspection.

Ideal Applications

FARO CMMs are perfect for prototyping, tooling verification, welding inspection, and on-site repair. They are widely used by field engineers in aerospace, automotive service centers, and even forensic reconstruction.

Learn about FARO’s solutions at FARO 3D Measurement.

Brown & Sharpe: A Legacy Brand Now in Hexagon’s Stable

Brown & Sharpe dates back to 1833 and is one of the oldest names in metrology. Today, Brown & Sharpe CMMs are manufactured by Hexagon but retain their own identity for specific markets. They represent a reliable, mid-range option with broad applicability.

Key Product Lines

  • Global Series – The most widely installed Brown & Sharpe bridge CMM, known for ease of use.
  • Micro-Hite Series – Entry-level CMMs for small shops and education.
  • Sharpe Series – High-performance models with enhanced scanning capabilities.

Technology Highlights

Brown & Sharpe CMMs leverage Hexagon’s PC-DMIS software and sensor technology. They are built with sturdy granite tables and air bearings. Many Global models include automatic temperature compensation (ATC) for shop-floor use.

Advantages

  • Good balance of accuracy and affordability.
  • Simple user interface suitable for operators with basic training.
  • Strong aftermarket support via Hexagon network.

Limitations

  • Less advanced optical scanning options than Zeiss or Hexagon’s Leitz line.
  • Brand identity may be overshadowed by Hexagon’s marketing.

Ideal Applications

Brown & Sharpe CMMs are a solid choice for small-to-medium manufacturers, tool rooms, and quality labs that need a dependable day-to-day measurement solution without the highest precision or scanning speed.

Head-to-Head Comparison: Accuracy, Portability, and Cost

While each brand has its niche, a direct comparison helps clarify trade-offs. The following summary distills key factors for decision-making.

Accuracy Ranking

In a controlled environment, the hierarchy of maximum achievable accuracy (using volumetric length measurement error, E0, in micrometers) roughly follows:

  • Zeiss – Typically 0.5–1.5 µm (PRISMO)
  • Mitutoyo – Typically 1.0–2.5 µm (CRYSTA-Apex)
  • Hexagon/Leitz – 0.8–2.0 µm (Reference)
  • Brown & Sharpe – 2.0–3.5 µm (Global)
  • FARO – 10–30 µm (Quantum Arm, depending on length)

If sub-micron accuracy is required, Zeiss and Hexagon’s Leitz division are the clear leaders. Mitutoyo offers excellent accuracy for most precision manufacturing applications.

Portability Ranking

  • FARO – Articulated arms and laser trackers are designed for mobility.
  • Hexagon – Absolute Arm provides portability; bridge models are fixed.
  • Mitutoyo – Limited portable options; primarily fixed bridge.
  • Brown & Sharpe – No portable arm offering.
  • Zeiss – No portable product line; stationary systems only.

Cost Ranking (from lowest to highest initial investment)

  • FARO – Entry-level Gage arm around $20,000–$30,000.
  • Brown & Sharpe – Micro-Hite and small Global models $30,000–$50,000.
  • Hexagon – Mid-range Global and Absolute Arm $40,000–$100,000.
  • Mitutoyo – CRYSTA-Plus and small Apex from $50,000–$100,000.
  • Zeiss – CONTURA and PRISMO start at $70,000 and can exceed $200,000.

Note: These are rough base prices; options, probes, software, and service contracts can significantly increase total cost.

Factors to Consider When Choosing a CMM Brand

Beyond brand reputation, a systematic evaluation ensures you invest in the right machine. Here are critical criteria:

Measurement Volume and Part Size

Determine the largest part you will measure. Bridge CMMs typically handle small to medium parts (up to 1000 mm in each axis). Gantry models (Hexagon or custom) can manage several meters. For parts over 2 meters, consider portable arms or laser trackers from FARO.

Accuracy Requirements

Define the tightest tolerance on your parts. A good rule: your CMM’s maximum permissible error (MPE) should be at least one-fifth of the part tolerance. For tolerances below 10 µm, Zeiss or Leitz is advisable. For 10–50 µm, Mitutoyo or Brown & Sharpe suffice.

Throughput and Automation

If you need high-speed inspection (e.g., 100+ parts per day), look for scanning CMMs with automatic pallet loading. Zeiss and Hexagon offer robust automation options. Manual CMMs from Mitutoyo or Brown & Sharpe are better suited for low-volume, high-mix environments.

Software and Programming Ease

Consider the learning curve and existing know-how. PC-DMIS (Hexagon/Brown & Sharpe) is widely used, many experienced programmers exist. Zeiss CALYPSO is intuitive but requires specific training. Mitutoyo’s MCOSMOS is user-friendly for basic tasks. FARO’s CAM2 is designed for portability and simplicity.

Service and Support

Evaluate local support: calibration, maintenance, and spare parts. All five brands have global networks, but coverage varies by region. Check warranty terms and hotline availability.

Special Considerations: Scanning vs. Touch-Trigger Probes

Today, scanning probes (analog) are preferred for complex surfaces, as they collect dense point clouds for form analysis. All major brands offer scanning. However, for purely dimensional measurement of prismatic parts, touch-trigger probes remain cost-effective. Zeiss and Hexagon have advanced scanning sensors, while Mitutoyo provides solid analog scanning at a moderate price.

The CMM industry is evolving rapidly. Here are trends shaping future purchases:

  • Multi-Sensor Integration: Combining tactile, optical, and laser in one machine (Zeiss O-INSPECT, Hexagon Global with scanning).
  • In-Line and In-Process Metrology: CMMs integrated into production lines for real-time feedback. Hexagon and Zeiss lead in automation.
  • Non-Contact Scanning Speed: White-light and structured-light sensors now capture entire surfaces in seconds. FARO’s laser line probes are improving rapidly.
  • Cloud-Based Data Management: Integration with MES and QMS systems for traceability. Hexagon’s Smart Factory ecosystem is a prime example.
  • AI and Machine Learning: Predictive maintenance and automated program optimization are emerging in some Zeiss and Hexagon software packages.

Conclusion: Making an Informed Brand Decision

Selecting the right CMM brand is a strategic investment in your quality infrastructure. Zeiss remains the benchmark for highest precision, especially when scanning complex, delicate parts. Mitutoyo offers unbeatable reliability and value for standard precision inspection across many industries. Hexagon provides the most versatile lineup and strongest software ecosystem, ideal for large facilities with diverse metrology needs. FARO is the portable champion for field inspection and reverse engineering. Brown & Sharpe (under Hexagon) fills the mid-range gap for simpler applications.

We recommend starting your selection process with a clear specification of your part dimensions, tolerances, production volume, and measurement environment. Then request quotes and demonstrations from at least two brands. Many manufacturers also offer trade-in programs and financing options.

Ultimately, the best CMM brand is the one that integrates seamlessly into your workflow, delivers consistent results, and is backed by responsive support. By understanding the strengths and trade-offs outlined here, you can confidently choose a CMM that elevates your quality assurance to the next level.

For a deeper dive into metrology best practices, consult the NIST Dimensional Metrology guidelines.