NextGen offers a heavy-duty line of specialized grips and fixtures for wood material testing, supporting universal testing machines (UTM) across industrial and academic laboratories. These components are engineered to meet the stringent standards of wood testing such as ASTM D198, ISO 3349, ISO 3340, and GB/T 1936.1, allowing accurate mechanical characterization under tension, shear, bending, and fastener withdrawal modes.
These fixtures are designed for compatibility with NG-EML and NG-SHM series UTMs and cover many sample dimensions and geometries found in engineered wood, structural panels, and fastener assemblies.
Six fixtures cover wood testing, and each answers a different question about the same material. The first is the plain tensile grip: side-action jaws, 10 kN, for pulling wood-based panels and boards apart along the specimen.
The NGB104B Tensile Grip is built for tension testing of wood-based panels and wooden boards. With a symmetrical grip structure, side-action clamping, and Φ10 mm pin compatibility, it offers a secure and reliable setup for low-force testing applications. Its heavy-duty construction supports up to 10 kN of force under ambient conditions.
| Parameter | Specification |
|---|---|
| Application | Tension test for wood-based panels and wooden board |
| Maximum Force Capacity | ≤ 10 kN |
| Upper Grip Weight | 8.4 lbs (3.82 kg) |
| Lower Grip Weight | 8.4 lbs (3.82 kg) |
| Working Temperature | Ambient |
| Connection - Upper Grip | Φ10 mm pin |
| Connection - Lower Grip | Φ10 mm pin |
| Upper Grip Height (A) | 5.1″ (130 mm) |
| Lower Grip Height (B) | 5.1″ (130 mm) |
| Grip Width (C) | 6.3″ (160 mm) |
| Clamping Mode | Side action |
| Jaw Face | 60 mm × 40 mm |
The second does not pull, it shears. It is rated to 2 kN and is meant for glue lines - layered wood with adhesives, and interlaminar shear in fibreboard.
The NGB203A Shearing Fixture is developed for shearing tests on layered wood with adhesives and for interlaminar shear evaluation of fiber-reinforced plastics. This compact fixture provides stable performance at low force ranges, suited to adhesive bond strength studies and material delamination behavior in wood and composites.
| Parameter | Specification |
|---|---|
| Application | Shearing test for layered wood with adhesives and interlaminar shearing for fiber reinforce plastic |
| Maximum Force Capacity | ≤ 2 kN |
| Grip Weight | 0.56 kg |
| Working Temperature | Ambient |
| Grip Height (A) | 48 mm |
| Grip Height (B) | 54 mm |
| Jaw Face | 60 mm × 40 mm |
Dimensions A and B used in Table 2.The next two both measure bond strength at 10 kN, and the difference is where the bond is. This one takes a 50 x 50 mm specimen and pulls the panel apart through its thickness, which is what internal bond means.
The NGH104A Tensile Fixture is developed for evaluating the internal bond strength of wood specimens. With left and right grip assemblies, it accommodates small wood samples with high accuracy. This fixture is suitable for low-force applications and features compact symmetrical grips for 50 mm × 50 mm samples, tested under ambient conditions.
| Parameter | Specification |
|---|---|
| Application | Tension test for determination of internal bond strength of wood specimen |
| Maximum Force Capacity | ≤ 10 kN |
| Left Grips Weight | 4 lbs (1.8 kg) |
| Right Grips Weight | 3.7 lbs (1.7 kg) |
| Working Temperature | Ambient |
| Connection - Upper Grip | Φ10 mm pin |
| Connection - Lower Grip | Φ10 mm pin |
| Left and Right Upper Grips Height (A) | 86 mm, 96 mm |
| Left and Right Lower Grips Height (B) | 66 mm, 80 mm |
| Left and Right Grips Width × Height (B) | 66 mm × 80 mm |
| Specimen Size | 50 mm × 50 mm |
Dimensions A and B used in Table 3.The companion fixture works on the surface instead: it measures how firmly the top layer holds, which is what a laminate or a coating fails at first.
The NGH104B Tensile Fixture is built for determining surface bond strength and surface soundness of wood specimens. With symmetrical left and right grips and precise clamping, this fixture supports small-format sample testing with a maximum capacity of 10 kN. It is optimized for ambient conditions and features standard Φ10 mm pin connections.
| Parameter | Specification |
|---|---|
| Application | Tension test for determination of surface bond strength and surface soundness of wood specimen |
| Maximum Force Capacity | ≤ 10 kN |
| Left Grip Weight | 3.4 lbs (1.56 kg) |
| Right Grip Weight | 3.4 lbs (1.56 kg) |
| Working Temperature | Ambient |
| Connection - Upper Grip | Φ10 mm pin |
| Connection - Lower Grip | Φ10 mm pin |
| Left Grip Height (A) | 7.1″ (180 mm) |
| Right Grip Height (B) | 7.3″ (185 mm) |
| Left Grip Width (C) | 66 mm |
| Right Grip Width (D) | 69 mm |
The fifth is not about the wood at all but about what is driven into it. Rated to 500 N, it withdraws a nail or a screw and reports the force it took.
The NGB502A Tensile Fixture is purpose-built for withdrawing nails and screws from wood specimens. With a low force capacity and precise clamping system, this fixture is suited to testing fastener resistance in wood-based assemblies. Compact and lightweight, it supports accurate testing with a Φ10 mm pin connection in ambient environments.
| Parameter | Specification |
|---|---|
| Application | Used for withdrawing nail/screw from wood |
| Maximum Force Capacity | ≤ 500 N |
| Upper Grip Weight | 0.24 kg |
| Lower Grip Weight | 3.5 lbs (1.6 kg) |
| Working Temperature | Ambient |
| Connection - Upper Grip | Φ10 mm pin |
| Connection - Lower Grip | Φ10 mm pin |
| Upper Grip Height | 95 mm |
| Lower Grip Height | 5.6″ (141 mm) |
| Grip Width (C) | 90 mm |
The last fixture bends rather than pulls: 10 kN across a specimen up to 90 mm wide. Its optional supports and rollers are listed in the two tables that follow its own.
The NGC104C Bending Fixture is engineered for 3-point and 4-point bending tests on wood-based panels and wooden boards. With a heavy-duty construction and high grip width (44.1″ (1120 mm)), it supports long-span testing with adjustable loading positions and spans. Suited to large-format material testing in ambient conditions.
| Parameter | Specification |
|---|---|
| Application | Bending test for wood-based panels and wooden board |
| Maximum Force Capacity | ≤ 10 kN |
| Weight | 96 lbs (43.5 kg) |
| Working Temperature | Ambient |
| Connection - Upper Grip | Φ10 mm pin |
| Connection - Lower Grip | Φ10 mm pin |
| Lower Grip Height (A) | 9.1″ (230 mm) |
| Grip Width (B) | 44.1″ (1120 mm) |
| Upper Span (Adjustable) | ≤ 13.4″ (340 mm) |
| Lower Span (Adjustable) | ≤ 39.4″ (1000 mm) |
| Specimen Width | ≤ 90 mm |
Dimensions A and B used in Table 6.Roller (Optional)
| No. | Diameter (mm) | Width A (mm) |
|---|---|---|
| WZWC104C-07 | 10 | 92 |
| WZWC104C-11 | 15 | 92 |
| WZWC104C-13 | 30 | 92 |
Accessories, NGC104C Bending Fixture
Roller Support (Optional)
| No. | Diameter (mm) | Width A (mm) | Height B (mm) |
|---|---|---|---|
| NGC104C-06 | 10 | 45 | 20 |
| NGC104C-10 | 15 | 45 | 20 |
| NGC104C-16 | 30 | 49 | 20 |
Whether you’re testing wood for structural integrity, assessing fastener performance, or evaluating engineered timber properties, NextGen’s range of fixtures ensures maximum testing precision and compliance. All products are compatible with NG universal testing machines and supported by industry standards. Contact our technical team to configure the right setup for your wood testing application or to request a demonstration.
Need Additional Quality Control Equipment to Build Your Laboratory?
Gripping and fixturing is only one part of a complete quality control laboratory. NextGen can help you equip your entire lab with impact testers, notching and broaching systems, cooling chambers, tensile testers, hardness testers, specimen preparation equipment, and other supporting solutions, all coordinated as one complete project.
These flexure fixtures are designed for precise bending tests on large, brittle, or high-strength specimens, including metals, ceramics, composites, concrete, and construction materials. Compatible with hydraulic universal testing machines, they support single-point, three-point, and four-point bending configurations with adjustable spans and roller supports. Capacities up to 2000 kN help laboratories evaluate flexural strength, deformation behavior, and structural integrity.
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Threaded grips for bolt and nut tensile testing provide secure axial loading for bolts, studs, nuts, and other threaded fasteners. Designed for universal testing machines, they help prevent slippage, thread stripping, and misalignment during high-force tests. Compatibility with ASTM F606, ISO 898, DIN 50125, and multiple metric thread sizes makes them useful for construction, automotive, aerospace, manufacturing, and fastener QC applications.
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Dual-Action Hydraulic Grips are high-capacity wedge-clamping fixtures for tensile testing on universal testing machines. Designed for metals, plastics, and composite specimens, they apply uniform hydraulic pressure to reduce slippage, deformation, and grip-end failures during demanding tests. Interchangeable jaw faces, hydraulic power-unit actuation, UTM compatibility, and support for ASTM, ISO, DIN, JIS, and GB/T workflows help laboratories improve safety and repeatability.
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These specialized grips and fixtures expand UTM testing capabilities for tear, peel, puncture, shear, and unique tensile applications. They are suitable for plastic films, nonwovens, geotextiles, footwear components, waterproof roll materials, safety nets, buckles, eyes, and sandwich structures. ASTM D624, ASTM D1004, ISO 34, ISO 3303, and related standards support reliable force measurement across packaging, textile, construction, and materials testing workflows.
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TestStar® Series grips and fixtures are high-precision accessories for integrating tensile, snubbing, wedge-action, pneumatic, compression, and bending setups with hydraulic and electromechanical universal testing machines. Built for metals, polymers, composites, geotextiles, and demanding industrial specimens, the series emphasizes rigid construction, quick interchangeability, ergonomic handling, and compatibility with ASTM, ISO, DIN, and related standards for repeatable mechanical testing.
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Composite grips and fixtures are engineered for tensile, compression, shear, bending, peel, and delamination testing of fiber-reinforced plastics, carbon composites, laminates, and hybrid materials. Designed for NextGen universal testing machines, they support standards such as ASTM D3039, ISO 527, ASTM D2344, ISO 14125, and DIN EN 2562. These fixtures help labs generate repeatable data for R&D, QA, and compliance testing.
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These 3-point and 4-point bending fixtures support flexural strength, deformation, and modulus testing of natural stone, ceramics, composites, concrete, metals, bricks, and other structural or brittle materials. Adjustable upper and lower spans, roller-supported loading, multiple capacity options, and optional deformation measurement help laboratories perform standardized bending tests with stable support conditions and repeatable force application.
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Wedge tensile grips are built for high-load tensile testing of flat and round specimens made from metals, composites, and plastics. Their wedge-action mechanism increases gripping pressure as tensile force rises, helping minimize slippage and maintain alignment during demanding tests. Available models support force capacities from lower-force laboratory work up to 300 kN, with interchangeable flat and vee jaw inserts for different specimen sizes.
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Pneumatic grips provide fast, repeatable air-actuated clamping for universal testing machines in high-throughput tensile and compression workflows. Designed for wires, composites, polymers, films, fabrics, and other materials, they apply uniform gripping pressure while reducing operator fatigue and sample loading time. Side-action, wedge-action, and snubbing configurations, plus interchangeable jaw faces, support secure holding across varied specimen geometries and standards.
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Shoulder fixtures are specialized tensile grips for specimens and components with shoulder geometries, where alignment and secure seating are essential for reliable pull-off or tensile testing. Compatible with NG-EML and SHM universal testing machines, they help laboratories reduce bending effects, improve repeatability, and support standardized ASTM and ISO workflows in research, production, and quality-control environments.
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Compression fixtures provide aligned axial loading for rigid samples tested on NG-EML and SHM universal testing machines. They are suited for metals, polymers, elastomers, foams, composites, and construction materials where stable force distribution and specimen alignment are critical. High-rigidity construction, secure contact surfaces, and compatibility with ASTM D695, ISO 604, ASTM E9, and GB/T 14485 support repeatable compression testing.
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These bending fixtures support standard 3-point flexural testing of plastics, composites, metals, ceramics, alloys, and construction materials. Designed for use with NG-EML and SHM universal testing machines, they offer adjustable spans, multiple capacity options, and repeatable roller-supported loading. Compatibility with ASTM D790, ISO 178, ISO 14125, ASTM E290, and GB/T 9341 helps laboratories perform consistent standards-based flexural evaluations.
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Eccentric roller grips are built for low-force tensile testing of thin, soft, and flexible specimens such as rubber sheets, plastic film, and deformable materials. Their cam-driven roller mechanism increases clamping pressure as tensile load rises, helping prevent slippage without damaging delicate surfaces. Compatible with NextGen NG-EML and SHM systems, they support repeatable alignment and accurate testing of narrow specimens.
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Self-tightening grips are designed for tensile testing of deformable, elastic, or low-friction materials such as rubber, plastics, foams, textiles, and biomedical specimens. As tensile force increases, the gripping mechanism automatically increases clamping pressure, helping compensate for thinning or elongation during the test. This reduces slippage, limits specimen damage, and improves repeatability without frequent manual adjustment.
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Snubbing grips, also known as capstan grips, are designed for tensile testing of wires, cables, ropes, textile strips, and geogrids that can slip or break in standard clamps. By wrapping the specimen around curved surfaces, they increase friction and reduce grip-end failures. These fixtures help laboratories achieve safer, more repeatable axial loading for high-strength or flexible materials.
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Side action tensile grips provide quick, secure clamping for films, thin sheets, textiles, fine wires, polymer strips, and other flexible specimens on universal testing machines. Available in manual lever and screw-action configurations, they support different force ranges, jaw surfaces, and specimen sizes. Their side-clamping design helps improve alignment, reduce slippage, and speed up routine tensile testing in QC and R&D labs.
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NG-EML Series A is a compact single-column benchtop universal testing machine for low-force tensile, compression, and flexural testing. Covering 50 N to 5 kN capacity options, it is suited for rubber, plastics, adhesives, films, foams, wires, metals, composites, and consumer products. Its electromechanical frame, high-speed servo actuation, GenTest software, and standards support make it practical for R&D and routine QC.
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NG-EML Series B is a dual-column benchtop electromechanical universal testing machine for precision testing from 100 N to 10 kN. Built for research and industrial labs, it supports tension, compression, flexural, and component testing of composites, high-strength metals, polymers, films, foams, and rubber. Its compact rigid frame, advanced control accuracy, and GenTest software help deliver repeatable results in limited lab space.
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NG-EML Series C is a dual-column electromechanical universal testing machine available in bench-top and floor-standing formats from 5 kN to 50 kN. Built for tension, compression, flexural, shear, and peel testing, it combines Class 0.5 accuracy, a servo direct-drive system, high-rigidity frame, touchscreen control, and GenTest software to support precise testing of metals, composites, rubber, plastics, and polymers.
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NG-EML Series D is a heavy-duty floor-standing electromechanical universal testing machine for high-capacity tensile, compression, and flexural testing. Available from 50 kN to 1000 kN, it is built for high-strength steels, advanced composites, alloys, and challenging research materials. Its rigid dual-column frame, servo direct-drive system, closed-loop control, safety protections, and GenTest software support stable, accurate testing.
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GenTest is NextGen’s advanced UTM testing software for electromechanical universal testing machines, managing test setup, live control, data acquisition, calculations, curves, and reporting from one method-driven environment. Preconfigured ASTM, ISO, DIN, EN, and BS templates help operators load the correct control mode, speeds, gauge length, formulas, and result fields for tensile, compression, and flexural tests.
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The GenMark 500 is a full-automatic gauge length marking machine for metal bar, rebar and wire rod, applying the reference marks used to determine elongation after fracture. A servo-driven lead screw sets 5 mm or 10 mm spacing and a pneumatic tungsten steel needle marks specimens up to 500 mm gauge length, supporting ISO 6892-1 and ASTM E8/E8M workflows. Adjustable marking force, quick needle changes, and fixtures for both round and flat samples keep specimen preparation consistent across operators and shifts.
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