Class D – Single-Column Charpy Impact Tester

The Class D Single-Column Charpy Impact Tester is equipped with a high-performance PLC (Programmable Logic Controller) that is specifically configured to support accurate and reliable pendulum operation.

This controller uses advanced logic and control algorithms to manage key functions such as pendulum elevation, release, and return with high precision. It ensures that test parameters like striker velocity and striking angle remain consistent and within required tolerances.

The system features a user-friendly digital interface, allowing operators to monitor test progress in real time, adjust settings as needed, and access recorded data with clarity and ease.

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The Class D Single-Column Charpy Impact Tester features a striking edge with a thickness of 16 mm. This dimension refers to the width of the impact surface that contacts the specimen during testing.

A 16 mm striking edge is specifically engineered to deliver consistent force transfer and simulate real-world impact conditions in accordance with standardized testing procedures. Its thickness ensures the proper distribution of impact energy without compromising the integrity of the component.

This standardized thickness meets common Charpy testing specifications and supports accurate, repeatable evaluations of material toughness and fracture behavior. It allows for valid comparisons across different tests and materials.

The robust design of the striking edge also contributes to the system’s long-term performance and reliability in both routine and high-energy impact testing applications.

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The Class D Single-Column Charpy Impact Tester supports a range of standardized specimen dimensions: 55×10×10 mm, 55×10×7.5 mm, and 55×10×5 mm. This flexibility allows for precise testing across a variety of materials and sample thicknesses.

Each of these specimen sizes maintains a consistent length of 55 mm and width of 10 mm, while the thickness can vary depending on the specific testing requirements or standard being followed.

This range of dimensions enables users to conduct impact tests on materials with different cross-sections, making the system suitable for both basic and advanced research applications. It supports accurate evaluation of fracture characteristics and impact performance.

The ability to work with multiple specimen sizes enhances the Class D tester’s adaptability in testing metals, alloys, and other engineering materials under controlled and repeatable conditions.

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The Class D Single-Column Charpy Impact Tester has overall dimensions of approximately 84.6 × 33.5 × 82.7 inches (length × width × height), or 215 × 85 × 210 cm. These measurements reflect the system’s assembled footprint and the space needed for safe and efficient operation.

Despite its structural strength, the Class D tester features a compact layout that fits well within laboratory or industrial testing areas. Its size is optimized to support pendulum operation, impact force delivery, and specimen handling while remaining space-efficient.

The 84.6-inch length accommodates the full arc of the pendulum, the 33.5-inch width ensures stability, and the 82.7-inch height provides sufficient clearance for vertical movement.

This balanced footprint makes the Class D tester a practical choice for use in academic environments, research labs, and production facilities, where both performance and floor space efficiency are important.

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Yes, the Class D Single-Column Charpy Impact Tester supports semi-automatic operation when paired with computer and software control. In this configuration, the operator manually places each specimen, while the software handles the rest of the testing cycle.

The integrated software enables precise control of critical parameters such as pendulum lift, striking angle, and velocity. This results in consistent and repeatable test conditions, aligned with standardized impact testing procedures.

The computer interface provides a clear and intuitive environment for managing tests, viewing live data, and handling automated data logging and analysis. This helps reduce manual errors and improves overall workflow accuracy.

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The Class D Single-Column Charpy Impact Tester features a striking edge with a radius of 2 mm. This rounded edge is a critical design element that affects how impact energy is delivered to the notched specimen during testing.

A 2 mm radius provides a controlled contact point, concentrating force in a consistent area and enabling accurate measurement of absorbed energy. This geometry helps standardize stress distribution at the moment of impact, which is essential for generating repeatable and meaningful test data.

The selected radius aligns with established Charpy testing standards, ensuring comparability of results across different machines and testing conditions.

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The Class D Single-Column Charpy Impact Tester is built with supports that have a slope angle of 0°. This flat configuration ensures the specimen sits evenly and securely during testing, helping to maintain consistency across all test conditions.

A 0° slope eliminates any tilt that could affect the alignment of the specimen, reducing the risk of measurement errors caused by uneven loading. This contributes to the repeatability and accuracy of test results, particularly in high-precision Charpy impact evaluations.

This design choice is essential for maintaining controlled conditions when analyzing material behaviour under dynamic loading. It ensures uniform energy transfer and reliable comparisons between different specimens.

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The Class D Single-Column Charpy Impact Tester is equipped with a range of interchangeable pendulum energy options, including 150 J, 300 J, 450 J, 600 J, and 750 J. These configurations enable accurate Charpy testing across a wide spectrum of materials and testing standards.

Each pendulum corresponds to a specific impact energy level, allowing operators to match the setup with their material’s expected toughness and the applicable standard requirements. Lower energy pendulums (150 J, 300 J) are ideal for testing less rigid or smaller specimens, while higher capacities (600 J, 750 J) accommodate high-strength metals and components used in industrial and structural applications.

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Yes, the Class D Single-Column Charpy Impact Tester can be equipped with an optional cooling system designed to facilitate low-temperature testing of specimens, with capabilities down to -180 °C.

This feature is particularly useful for evaluating material behavior under extreme cold conditions, which is critical in industries such as aerospace, automotive, and advanced materials research. The system ensures specimens are consistently maintained at the required temperature prior to impact.

The cooling unit delivers precise thermal control, supporting accurate and repeatable test results while complying with standards that require sub-zero specimen conditioning.

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Yes. The Class D uses a tool-free striker replacement system, so the operator can change the striker on the pendulum to suit the ISO or the ASTM requirement without dismantling the pendulum.

Our operation manual lists two Charpy strikers as wear parts: an R2 striker with the 2 mm edge radius used for ISO testing, and an R8 striker with the 8 mm radius used for ASTM testing. The striker is held on the pendulum head by a striker press.

After a change, check that the striker and its press are secure before the next test, as the manual asks before every test. The manual also calls for verification after replacement of critical components, and we can advise which checks apply when you switch between ISO and ASTM work.

Spare strikers are ordered separately as wear parts, so a lab working to both standards can keep each one on hand.

The Class D Single-Column Charpy Impact Tester is equipped with supports that have a curvature radius of 1 mm. This specific radius is designed to ensure accurate, uniform contact with the specimen during impact testing.

A 1 mm radius helps distribute the applied load evenly across the support surface, minimizing stress concentrations that could distort results. This is especially important when testing materials that are thin, brittle, or sensitive to uneven loading.

This curvature value aligns with standardized Charpy testing requirements and supports reliable energy absorption measurements across a variety of sample types.

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The NG752 Class D, with its 750 J (553 ft-lbs) maximum, is built for demanding industrial work in aerospace, steel production and heat treatment operations. These are the settings where tough steels and alloys need more pendulum energy than a lower-capacity frame offers.

In steel production and heat treatment, Charpy results are part of release and process control, and they are often required at low temperature. For that work the Class D can be paired with its optional low-temperature conditioning system, or with a separate impact specimen cooling chamber.

The higher-energy frame also carries stronger braking. Our operation manual lists the NG752 with a pneumatic dual brake or an electromagnetic brake, depending on the build, where the NG452 uses a single pneumatic brake. Tell us your highest expected absorbed energy and your shift volume, and we will recommend the frame.

Yes, the Class D Single-Column Charpy Impact Tester includes a touchscreen display that can optionally be connected to a PC for advanced data analysis. This integration allows users to control the system through dedicated software, providing greater flexibility and improved data processing.

Through PC connectivity, users can perform deeper analysis, visualize impact curves, and generate detailed test reports. The software interface supports efficient parameter adjustments, real-time monitoring, and organized data storage—all from a centralized platform.

The combination of touchscreen control and PC integration offers a well-rounded solution for precise Charpy impact testing. This feature is particularly valuable in quality control, research, and testing laboratories where detailed material performance insights are essential.

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The Class D Single-Column Charpy Impact Tester is built with a rigid, floor-mounted single-column frame designed to withstand high-impact forces up to 750 J. The system’s robust structural design incorporates a precision-machined base and reinforced column that minimize vibrations and deflection during testing.

This added rigidity ensures accurate energy transfer to the specimen and consistent striker motion, which are critical for reliable results in high-energy testing scenarios. The durable construction also improves repeatability and stability, even under intense operational loads, making the Class D model suitable for rigorous testing environments and compliance with ASTM and ISO standards.

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The pendulum shaft of the Class D runs in high-precision bearings. Their job is to keep friction low and steady, because energy taken from the swing by the bearings would otherwise be read as energy absorbed by the specimen.

Bearing friction is also measured. The touchscreen runs a friction and windage routine with blank swings, and the measured loss is applied as a correction to the absorbed energy. Our operation manual asks for this check at the start of each testing day, with a total loss below 0.5% of the nominal energy of the installed pendulum.

If a blank swing ever shows a loss outside tolerance, the bearings should not be lubricated or adjusted on site. Contact our technical support instead, and we will work through the cause with you before testing resumes.

The Class D Single-Column Charpy Impact Tester operates with a striker velocity of 5.24 m/s. This is the speed at which the pendulum impacts the specimen during testing and is a critical factor in determining the energy absorbed upon fracture.

Maintaining a constant velocity of 5.24 m/s ensures repeatable and standardized testing conditions in accordance with Charpy testing protocols. This consistent velocity is essential for obtaining accurate and reliable impact energy readings.

The selected striker speed supports compliance with international testing standards and helps assess a material’s resistance to sudden impact loads. It enables clear comparisons between different materials, making it useful for quality control, design validation, and research.

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The Class D Single-Column Charpy Impact Tester is a precision-engineered system equipped with a wide array of standard features to support reliable and efficient impact testing. Built with a fully enclosed frame, it ensures operator safety and consistent test conditions.

The system includes both analog and digital displays for accurate energy measurement. For users requiring data management capabilities, an optional PC connection is available to enable advanced analysis through dedicated software.

Key features include a rigid single-column design with a cast iron base for vibration control, a PLC touchscreen interface for streamlined operation, and a secure pendulum locking mechanism. A motorized pendulum lift with automatic return simplifies the testing cycle.

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Yes, the Class D Single-Column Charpy Impact Tester is built to minimize vibration effects during impact testing. It features a robust cast iron base that delivers high structural stability and effectively dampens vibrations that could influence the accuracy of results.

This solid base construction helps absorb mechanical shock and external vibrations, ensuring a stable platform throughout the testing process. Such design considerations are critical for achieving consistent, high-precision measurements.

By reducing vibration-related interferences, the Class D tester maintains test integrity, allowing for repeatable and dependable impact energy readings—particularly important when assessing material behaviour under high-energy conditions.

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The NG752 Class D Single-Column Charpy Impact Tester supports optional pendulum energy configurations of 300 J, 450 J, and 600 J. These options allow users to tailor the system to meet specific testing requirements across a variety of materials and applications.

The 300 J pendulum is well-suited for evaluating materials with moderate impact resistance, offering precise and repeatable testing conditions. For more demanding scenarios, the 450 J and 600 J pendulums provide higher energy levels needed to assess the performance of structural metals and other high-strength materials.

This range of optional configurations increases the versatility of the NG752 Class D tester, enabling users to select the appropriate energy level for accurate fracture analysis and impact performance evaluation.

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Every Class D comes with lifetime product support from NextGen, for as long as the machine is in service. That covers help with installation, operator training and calibration, and technical support whenever a question comes up in daily use.

Calibration and verification start the machine's life. Our operation manual calls for them after installation and then at the intervals your test standard and quality system require, plus after relocation, a major repair, replacement of critical components, or whenever results look wrong. We can carry out this work or guide your own team through it.

Wear parts such as anvils and strikers are listed in the manual, and our stocked consumables and spares keep the machine running between visits. For a question on your machine, reach our support team with the model and serial number.

The 450 J model of the Class D Single-Column Charpy Impact Tester is frequently used in academic institutions, certification bodies, and research laboratories for standardized Charpy impact testing.

In universities and technical colleges, this model supports instruction in materials science and mechanical engineering courses, allowing students to explore fracture mechanics and understand material behaviour under impact loading.

Government testing centers and regulatory agencies use the 450 J system to validate material toughness for public works and safety-related applications. Its compliance with ASTM and ISO standards ensures trustworthy testing for certification purposes.

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The Class D Single-Column Charpy Impact Tester is equipped with a striking tip set at a 30° angle. This angle is precisely defined to deliver a standardized and consistent impact during Charpy testing procedures.

The 30° angle helps ensure optimal contact between the striking edge and the notched specimen, supporting accurate energy transfer and repeatable test outcomes. It reflects commonly accepted testing standards and is critical for maintaining measurement reliability.

This fixed-angle configuration contributes to uniform testing conditions across specimens and materials, enabling valid comparisons and dependable assessments of material toughness and fracture behavior.

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The Class D Single-Column Charpy Impact Tester is designed with support anvils that feature a taper angle of 11° ± 1°. This specific range ensures that the specimen is held securely and in precise alignment during impact testing.

The tapered design of the supports plays a vital role in maintaining consistent test conditions by minimizing the risk of misalignment or shifting during the test. The 11° taper provides optimal contact with the specimen and helps distribute the applied force uniformly across the support span.

Allowing for a tolerance of ±1° ensures that slight manufacturing or setup variations do not compromise testing accuracy or repeatability.

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The NG752 Class D is rated at 1.5 kW. For the NG452, we confirm the rated power with your build at quotation, because it depends on the configuration ordered.

The machine runs on a three-phase 220 V supply, with the exact voltage, frequency and rating stated on the machine nameplate and in the purchase contract. It ships with a 5 m (16.4 ft) power cable, must be connected to a reliable protective earth, and the electrical work should be done by a qualified electrician to local codes.

A stable supply matters for the measurement as well as for the motor, since the control and data acquisition system depends on a sound ground connection.

One check after installation: the pendulum must rise counterclockwise on the Raise command. If it turns the other way, the phase sequence is wrong and must be corrected before the machine is used.

The Class D Single-Column Charpy Impact Tester is designed to minimize the effects of wind resistance during testing, supporting consistent and accurate impact energy measurements.

To reduce aerodynamic interference, the tester features a pendulum with a streamlined profile and rounded edges. This design decreases the surface area exposed to airflow, allowing the pendulum to move through the air with reduced drag.

While it is not possible to eliminate wind resistance entirely, the machine’s engineering significantly limits its impact. For optimal accuracy, it is still recommended to perform tests in a controlled environment with minimal ambient air movement.

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The Class D Single-Column Charpy Impact Tester has a support span of 40 mm. This measurement refers to the fixed distance between the two supports where the specimen rests during testing.

A 40 mm span is the standardized value used in Charpy impact testing and ensures consistent placement and alignment of specimens across all tests. This uniform setup supports accurate energy absorption measurements and minimizes errors caused by misalignment or uneven loading.

The fixed support span is suitable for testing a range of specimen geometries, contributing to both testing flexibility and compliance with international standards.

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Most of the work between tests is done by the machine. A pneumatic centering device places each specimen on the anvil quickly and in the same position, which matters most in low-temperature testing, where every second between the cooling bath and the impact changes the result.

The pendulum is raised by motor and, after the impact, returns to the release position on its own, where an automatic pneumatic lock holds it ready. The operator runs the cycle from the touchscreen with Raise, Impact and Release commands, and can set the impact to start once the safety door is closed.

After every swing the test screen shows the absorbed energy, the angle of rise and the current angle, so results are read without manual calculation. Optional software control and automatic feeding take more of the cycle off the operator, and we can quote either as your volume grows.

The NG452 Class D Single-Column Charpy Impact Tester offers optional pendulum energy levels of 150 J, 300 J, 450 J, and 600 J. These configurations provide the flexibility needed to match testing conditions to a wide range of material properties.

The 150 J and 300 J options are best suited for evaluating materials with lower impact strength, offering accurate measurements under lighter loading conditions. For more robust materials or applications requiring higher energy absorption, the 450 J and 600 J pendulums deliver the force necessary to conduct reliable, high-energy impact testing.

This range of pendulum capacities makes the NG452 Class D model adaptable for everything from routine testing to advanced material research, allowing users to select the most appropriate configuration for precise and consistent test results.

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The Class D Single-Column Charpy Impact Tester offers an angle resolution of 0.025°, enabling highly accurate measurement of the pendulum's movement during impact testing.

This fine level of resolution allows the system to detect even minimal variations in the angle of swing, ensuring that every detail of the impact event is precisely captured. Such precision is especially important for analyzing material fracture behavior and verifying the consistency of impact energy readings.

The 0.025° resolution supports advanced material evaluation, helping engineers and researchers identify subtle differences in performance across specimens and improve product design or quality control processes.

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Yes. The Class D is built for Charpy pendulum impact testing of metals to ISO 148. Our operation manual works to all three parts of the series: ISO 148-1 for the test method, ISO 148-2 for verification of the testing machine, and ISO 148-3 for the preparation and characterization of reference test pieces.

ISO 148-1 sets how the notched specimen is supported, broken in a single blow and reported as absorbed energy. ISO 148-2 governs the machine itself, and the Class D is calibrated and verified to it after installation and at the intervals your quality system sets.

If your contract or material specification names a particular part or edition, send us the designation and we will confirm the striker, the specimen size and the reporting that meet it.

Yes, the Class D Single-Column Charpy Impact Tester can be configured with an optional specimen feeding system that automates the handling and positioning of specimens during testing.

This feature streamlines the testing process by reducing the need for manual loading, thereby improving efficiency and minimizing the potential for user error. It ensures consistent specimen alignment and repeatable impact conditions across a large number of tests.

When integrated with PC-based software control, the specimen feeding system enables fully automated operation—managing everything from specimen loading to test execution. This allows the operator to focus on oversight and data review rather than manual tasks.

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Yes. The Class D performs Charpy testing to ASTM E23, the ASTM test methods for notched bar impact testing of metallic materials. E23 covers both Charpy and Izod configurations, and the Class D, as a Charpy machine, covers the Charpy part of the standard.

The ASTM method uses a different striker from the ISO method, so the Class D is fitted with its ASTM striker for this work, a change made without tools. The rest of the test geometry, from the support span to the striking velocity, follows the standard.

E23 also sets requirements for verifying Charpy machines, and our operation manual allows calibration and verification to ASTM E23 as well as to ISO 148-2. Tell us whether your customers ask for E23 results, ISO results or both, and we will supply the strikers and the verification for each.

We confirm the installed weight of your Class D at quotation, together with the foundation and anchoring details for the frame you choose, the NG452 or the NG752.

The mass is there for a reason. The heavy cast iron base and the rigid single-column frame keep the machine still as the pendulum breaks a specimen, which protects the accuracy of the energy reading.

Plan the installation around it. The frame is fixed with the anchor bolts and wedge blocks supplied as standard accessories, lifted only at its designated lifting point with equipment rated for the full machine weight, and needs at least 0.7 m (2.3 ft) of clearance around it for operation. The site should be free of impact and vibration from nearby equipment.

Send us your floor plan and access route, and we will check the delivery and installation with you.

Yes. The Class D performs Charpy impact tests on metallic materials to EN 10045, the European standard series for notched bar Charpy testing with a swinging pendulum.

In purchasing and qualification documents the citation usually points to EN 10045-1, the part that defines the test method. In several national adoptions EN 10045-1 is listed as withdrawn and replaced by EN ISO 148-1. The Class D covers both citations, so the same machine serves an older EN 10045 contract and a current EN ISO 148-1 one.

Work from the exact designation and edition on the drawing, material specification or contract. Send it to us with your specimen size, and we will confirm the striker and reporting that apply.