Eccentric Roller Grips for Thin and Flexible Specimens

Metal Testing Equipment

Get Catalogue Get Brochure Request Quote

Eccentric Roller Grips for Thin and Flexible Specimens

Standards

Optimized Clamping System for Tensile Testing of Sheet Materials and Soft Specimens

Eccentric roller grips from NextGen Test meet the demanding needs of tensile testing applications involving thin, flexible, or soft materials. Utilizing a friction-based clamping mechanism activated by an eccentric cam roller, these grips ensure automatic alignment and firm engagement of the specimen without slippage or damage. The gripping force increases with the applied test load, making them suited to materials that are sensitive to pressure or deformation. These grips are particularly suitable for applications in packaging, film, sheet material, textiles, and soft metals. All models are fully compatible with NG-EML and SHM Universal Testing Machines and conform to international standards including ISO 6892, ASTM D882, and DIN 51221.

Eccentric Roller Grip Models

Three grips share the same cam mechanism, the same Ø10 mm pin mount and the same 30 mm specimen width. What separates them is force and body size, so the choice comes down to the break load you expect and the room you have in the frame. The lightest one starts the range at 500 N.

Model NGA502A

Eccentric Roller Tensile Grip

The NGA502A Eccentric Roller Grip is built for precise tensile testing of thin, soft, and low-strength materials such as rubber sheets, plastic films, and soft composites. It utilizes an eccentric roller mechanism to generate increasing clamping force as the tensile load rises, so the specimen remains securely held without damaging its surface. This compact grip is suited to delicate materials that are prone to tearing or slippage in standard fixtures, and it offers smooth operation under low-force testing conditions.

NextGen Tensile grip Eccentric roller NGA502A

Application: Tension tests for rubber, plastic films, and soft sheet materials.
Maximum Capacity: Up to 500 N load.
Connection: Ø10 mm pin mount (upper and lower), compatible with most universal testing machines.
Dimensions: Height 80 mm; Grip body width 30 mm; Overall width 50 mm.
Specimen Range: Suitable for specimens up to 30 mm in width.
Grip Weight: Approximately 0.44 kg each for upper and lower grip.
Working Temperature: Ambient laboratory environment.

**Table 1.** NGA502A Eccentric Roller Grip for Soft Materials
Parameter	Specification
Application	Tension test for rubber, plastic film and soft material
Maximum Force Capacity	≤ 500 N
Connection Type	Upper Grip: Ø10 mm pin Lower Grip: Ø10 mm pin
Overall Height (A)	80 mm
Grip Body Width (B)	30 mm
Overall Width (C)	50 mm
Working Temperature	Ambient
Grip Weight	Upper Grip: 0.44 kg Lower Grip: 0.44 kg
Compatible Specimen Width	≤ 30 mm

The second grip holds the same 500 N rating but spreads it over a much wider body, 4.9″ (125 mm) against 30 mm. It is the one to take when the frame has the room and the specimen needs a broader seat.

Model NGA502B

Eccentric Roller Tensile Grip

The NGA502B Eccentric Roller Grip is tailored for tensile testing of soft sheet materials such as rubber, plastic film, and other deformable specimens. Featuring an eccentric cam mechanism, the grip applies increasing clamping pressure in response to tensile load, effectively securing the specimen without slippage or surface damage. Compared to smaller models, the NGA502B offers a more heavy-duty build and larger grip body, making it suited to medium-sized test setups requiring consistent performance under low-force testing conditions.

NextGen Tensile grip Eccentric roller NGA502B

Application: Tension tests for rubber, plastic films, and soft materials.
Maximum Capacity: Up to 500 N load.
Connection: Ø10 mm pin mount (upper and lower), compatible with standard UTMs.
Dimensions: Height 97 mm; Grip body width 4.9″ (125 mm).
Specimen Range: Supports specimens up to 30 mm wide.
Grip Weight: Approximately 2.5 lbs (1.13 kg) each for upper and lower grip.
Working Temperature: Ambient conditions.

**Table 2.** NGA502B Eccentric Roller Grip for Soft Materials
Parameter	Specification
Application	Tension test for rubber, plastic film and soft material
Maximum Force Capacity	≤ 500 N
Connection Type	Upper Grip: Ø10 mm pin Lower Grip: Ø10 mm pin
Overall Height (A)	97 mm
Grip Body Width (B)	4.9″ (125 mm)
Working Temperature	Ambient
Grip Weight	Upper Grip: 2.5 lbs (1.13 kg) Lower Grip: 2.5 lbs (1.13 kg)
Compatible Specimen Width	≤ 30 mm

The third doubles the force to 1 kN and returns to the narrow 30 mm body, at the cost of height and weight. It closes the range for soft specimens that break past 500 N.

Model NGA103A

Eccentric Roller Tensile Grip

The NGA103A Eccentric Roller Grip is engineered for low-force tensile testing of soft and flexible materials such as rubber sheets, thin films, and other soft specimens. It features an eccentric roller mechanism that progressively increases clamping pressure in response to tensile loading, providing secure gripping without damaging delicate materials. With a compact body and moderate height, the NGA103A offers stable and repeatable performance for specimen widths up to 30 mm and loads up to 1 kN.

NextGen Tensile grip Eccentric roller NGA103A

Application: Tension tests for rubber, plastic film, and soft sheet materials.
Maximum Capacity: Up to 1 kN load.
Connection: Ø10 mm pin mount (upper and lower), suitable for universal testing machines.
Dimensions: Height 4.3″ (110 mm); Grip body width 30 mm; Overall width 60 mm.
Specimen Range: Accommodates specimens up to 30 mm wide.
Grip Weight: Approximately 3 lbs (1.34 kg) each for upper and lower grip.
Working Temperature: Ambient laboratory conditions.

**Table 3.** NGA103A Eccentric Roller Grip for Soft Materials
Parameter	Specification
Application	Tension test for rubber, plastic film and soft material
Maximum Force Capacity	≤ 1 kN
Connection Type	Upper Grip: Ø10 mm pin Lower Grip: Ø10 mm pin
Overall Height (A)	4.3″ (110 mm)
Grip Body Width (B)	30 mm
Overall Width (C)	60 mm
Working Temperature	Ambient
Grip Weight	Upper Grip: 3 lbs (1.34 kg) Lower Grip: 3 lbs (1.34 kg)
Compatible Specimen Width	≤ 30 mm

Eccentric roller grips provide the right choice when testing materials where surface integrity and tension alignment are critical. Their cam-driven actuation and friction-lock design eliminate the need for manual tightening while keeping test repeatability and accuracy. Designed for full integration with NextGen Test’s NG-EML and SHM universal testing machines, these grips support a wide array of international test standards and are relied upon in material testing labs across North America. Contact our technical specialists to receive a quote or to upgrade your testing system with our high-performance eccentric roller grip series.

For Laboratories

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.

One partner to equip your complete laboratory
Installation, training, calibration
Support for the life of the equipment

See How We Equip Labs

Request Quote

FAQs

How Does an Eccentric Roller Grip Clamp Thin and Flexible Specimens?

It holds the specimen by friction against an eccentric cam roller. As the test pulls on the specimen, the roller turns with it and narrows the gap, so the clamping force rises with the test load instead of being set once by hand.

That is what thin, soft and pressure-sensitive materials need. A screw jaw tight enough to hold a film at peak load would crush or tear it at the start, while a lighter setting lets it slip. Because the cam's pressure grows with the load, the specimen stays put without damage to its surface.

The same action seats the specimen in line with the load, and no manual tightening is needed between tests, which removes one source of operator-to-operator scatter and keeps results repeatable.

Which Eccentric Roller Grip Fits a 500 N or 1 kN Break Load?

Two of the three grips are rated to 500 N and one to 1 kN, so the expected break load decides first. Soft specimens that break above 500 N go on the NGA103A, which doubles the force in a narrow 30 mm body, at the cost of more height (110 mm) and weight (1.34 kg per half).

Between the two 500 N grips the choice is body size. The NGA502A is the most compact, 80 mm high with a 30 mm body and 0.44 kg per half. The NGA502B carries the same rating on a 125 mm body, 97 mm high, with a heavier build for medium-sized setups where the frame has the room.

Describe the specimen and the load you expect at break in a quote request, and our technical specialists will recommend the grip that suits it.

Which Films, Sheets and Soft Materials Suit the Eccentric Roller Grips?

The grips are built for thin, flexible or soft materials: plastic film and sheet, rubber sheet, soft composites, packaging materials, textiles and soft metals. These are the specimens most prone to tearing or slipping in standard fixtures.

The range conforms to international standards including ASTM D882, the tensile method for thin plastic sheeting and film that reports tensile strength, elongation and modulus, and ISO 6892 for metallic materials. It also meets DIN 51221, the standard for tensile testing machines.

Labs across North America rely on these grips wherever surface integrity and alignment decide the result. On film in particular, a specimen that breaks at the grip is normally discarded and retested, so a grip that leaves the surface unmarked saves specimens and time.

Which Specimen Width and Pin Do the Three Eccentric Roller Grips Share?

All three grips take specimens up to 30 mm wide, whichever model you choose, so film and sheet can be cut to one strip width for the whole range.

Each grip connects through Ø10 mm pins on the upper and lower halves, which fits most universal testing machines, and the range is fully compatible with our NG-EML and SHM universal testing machines. The grips work in an ambient laboratory environment.

These are low-force grips, so pair them with a load cell whose range suits their ratings. A cell sized for a much larger machine reads a light film test with too little resolution.

Related Products

NG-EML Series A – Single-Column Universal Testing Machine (50 N – 5 kN)

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.

NG-EML Series B – Dual-Column Universal Testing Machine (100 N – 10 kN)

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.

NG-EML Series C – Dual-Column Universal Testing Machine (5–50 kN)

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.

NG-EML Series D – Floor-Standing Universal Testing Machine (50–1000 kN)

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.

NG-SHM Series A – Servo-Hydraulic Universal Testing Machine (300–3000 kN)

NG-SHM Series A is a high-force servo-hydraulic universal testing machine for static mechanical testing of metals and structural components. Available from 300 kN to 3000 kN, it uses a high-stiffness multi-column frame and dual-zone layout for tensile and compression work. Hydraulic wedge grips, extensometer compatibility, and GenTest software support testing of rebar, fasteners, chains, welds, castings, and large metallic specimens.

NG-SHM Class DP – Servo-Hydraulic Universal Testing Machine

NG-SHM Class DP is a high-force servo-hydraulic testing machine with an upper actuator, single-zone test space, and side-action hydraulic wedge grips. Available in 600 kN, 1000 kN, and 2000 kN capacities, it supports tension, compression, bending, and shearing tests on metals and structural specimens. Its automatic clamping adjustment, dual-direction grip alignment, precision transducer, and long-travel cylinder help deliver stable, repeatable results.

NG-SHM Class D – Servo-Hydraulic Universal Testing Machine

NG-SHM Class D is a servo-hydraulic universal testing machine for high-force mechanical testing of metals and structural components. Available in 600 kN, 1000 kN, and 2000 kN capacities, it uses an upper actuator and single-zone test space for tension, compression, bending, and shearing. Its long-travel cylinder, wedge hydraulic grips, and rigid guidance system make it suitable for extra-long, high-elongation specimens.

NG-SHM Class C – Servo-Hydraulic Universal Testing Machine

NG-SHM Class C is a servo-hydraulic universal testing machine for high-force metal testing, with capacity options of 600 kN and 1000 kN. Its longer jaw face is designed for tensile testing of stranded steel wire, while the 6-column frame, dual-zone test space, hydraulic wedge grips, quick-return valve, and precision load cell support accurate, repeatable testing of rebar, fasteners, chains, welds, and castings.

NG-SHM Class B – Servo-Hydraulic Universal Testing Machine

NG-SHM Class B is a high-force servo-hydraulic universal testing machine for tensile, compression, and flexural testing of metals and other high-strength materials. Available from 300 kN to 3000 kN, it uses a rigid multi-column frame, dual-zone test space, hydraulic wedge grips, and precise load-cell measurement to support reliable testing of fasteners, rebar, chains, welds, castings, and structural components.

GenMark 500 – Automatic Gauge Length Marking Machine

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.

Pneumatic Grips for Fast and Repeatable Clamping

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.

Side-Action Tensile Grips

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.