Shoulder Fixtures for Pull-Off Testing

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Shoulder Fixtures for Pull-Off Testing

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Precision Shoulder Grips for Tensile Testing on NG-EML and SHM Series UTMs

Shoulder Fixtures for Pull-Off and Component Testing

NextGen’s shoulder fixtures are specialized tensile grips designed to accommodate specimens with shoulder geometries. These fixtures are critical for standardized testing in accordance with ISO and ASTM protocols where alignment, clamping precision, and repeatability are essential. Compatible with NG-EML and SHM UTMs, these fixtures ensure high-reliability results in both R&D and production environments. 

Typical standards supported include: 

  • ASTM D638 (Tensile Properties of Plastics) 
  • ISO 527 (Tensile Testing of Plastics) 
  • GB/T 1040 (Plastic Tensile Test Methods) 

Applications range across polymer composites, machined plastic components, and metals formed to shoulder profiles. All models support safe and rigid clamping under increasing loads. 


Shoulder Fixture Models

Five fixtures share the shoulder clamping principle and split by what they hold. The first stands apart from the rest: it is the only one for cement mortar, and it is rated to 2 kN.

Model NGB203A

Tension Grip

The NGB203A Tension Grip is built for low-force tensile testing of cement mortar specimens. With a load capacity of up to 2 kN, this fixture is suited to evaluating the tensile strength of brittle, cement-based materials. It features a compact yet durable design, Ø10 mm pin connections, and is suitable for use with universal testing machines in ambient environments. The precision alignment and reliable clamping surface ensure accurate and repeatable results in material strength verification.

Shoulder fixture for pull-off testingNextGen Tension grip NGB203A
Table 1. NGB203A Tension Grip for Cement Mortar
Parameter Specification
Application Tension test for cement mortar
Maximum Force Capacity ≤ 2 kN
Upper Grip Weight 2.6 lbs (1.18 kg)
Lower Grip Weight 2.2 lbs (1.0 kg)
Working Temperature Ambient
Connection Type Ø10 mm pin (upper and lower)
Upper Grip Height (A) 4.7″ (120 mm)
Lower Grip Height (B) 88 mm
Width (C) 88 mm

The four that follow are for adhesive bonds, and the substrate decides which one you need. This is the base fixture: 1 kN, square 50 x 50 mm substrates.

Model NGC103A

Tension Grip

The NGC103A Tension Grip is purpose-built for low-force adhesive tensile testing. With a force capacity of up to 1 kN, it is suited to evaluating adhesive bond strength between substrates under controlled laboratory conditions. This compact fixture features a shoulder clamping mode and is built for substrates measuring 50 × 50 mm and adhesives up to 12 mm thick. Standard Ø10 mm pin connections and stable construction make NGC103A a reliable choice for quality control and material development labs.

NextGen Tension grip - sizeNextGen Tension grip - NGC103A
Table 2. NGC103A Tension Grip for Adhesive Testing
Parameter Specification
Application Tension test for adhesives
Maximum Force Capacity ≤ 1 kN
Upper Grip Weight 0.75 kg
Lower Grip Weight 0.8 kg
Working Temperature Ambient
Connection Type Ø10 mm pin (upper and lower)
Upper Grip Height (A) 3.9″ (100 mm)
Lower Grip Height (B) 80 mm
Width (C) 70 mm
Clamping Mode Shoulder
Specimen Size Substrate: 50 × 50 mm
Adhesive: 50 × 12 mm

The same 1 kN rating, but a longer and narrower substrate - 75 x 12 mm instead of square. It is the one to take when the bonded joint runs along the specimen rather than across it.

Model NGC103B

Tension Grip

The NGC103B Tension Grip is optimized for adhesive tensile testing where larger substrates or longer bonded joints are involved. With a 1 kN maximum load capacity and a shoulder clamping mechanism, it ensures stable and precise specimen alignment during testing. Designed for substrates up to 75 mm long and adhesives 12 mm thick, this fixture is well-suited for laboratories performing repeatable adhesive strength evaluations. Standard Ø10 mm pin compatibility makes it suited to use with most tabletop universal testing systems.

NextGen Tension grip - NGC103B - size 2NextGen Tension grip -  NGC103B - sizeNextGen Tension grip - NGC103B
Table 3. NGC103B Tension Grip for Adhesive Testing
Parameter Specification
Application Tension test for adhesives
Maximum Force Capacity ≤ 1 kN
Upper Grip Weight 0.5 kg
Lower Grip Weight 0.6 kg
Working Temperature Ambient
Connection Type Ø10 mm pin (upper and lower)
Upper Grip Height (A) 4.3″ (110 mm)
Lower Grip Height (B) 80 mm
Width (C) 95 mm
Clamping Mode Shoulder
Specimen Size Substrate: 75 × 12 mm
Adhesive: 50 × 12 mm
NextGen Tension grip - NGC103B - size 3Dimensions A, B and C used in Table 3.

Where the bonded area itself is large, the NGC203 comes as a series. All three sizes hold 2 kN; what changes is the seat, from 50 mm square up to 7.9″ (200 mm) square.

Model NGC203

Tension Grip Series

The NGC203 Tension Grip Series is developed for adhesive strength testing across many specimen sizes. Available in three models - NGC203B, NGC203C, and NGC203E - this series supports test blocks from 50 × 50 mm to 7.9 × 7.9″ (200 × 200 mm), all within a 2 kN maximum force range. These grips feature a modular design that allows the number of bonding blocks to be tailored to specific testing requirements. Constructed for reliability and repeatability in ambient conditions, all models are equipped with Ø10 mm pin connections and standardized dimensions for integration with universal testing systems.

NextGen Tension grip -  NGC203 - sizeNextGen Tension grip -  NGC203
  • Application: Tension tests for adhesive strength.
  • Models: NGC203B, NGC203C, NGC203E.
  • Maximum Capacity: Up to 2 kN load.
  • Specimen Sizes: 50 × 50 mm (B), 3.9 × 3.9″ (100 × 100 mm) (C), 7.9 × 7.9″ (200 × 200 mm) (E).
  • Connection: Ø10 mm pin (upper and lower), compatible with standard UTMs.
  • Height: 60 mm (both upper and lower grips).
  • Widths: 50 mm (B), 3.9″ (100 mm) (C), 7.9″ (200 mm) (E).
  • Grip Weight: See model-specific table below.
  • Working Temperature: Ambient.
  • Note: The number of bonding blocks can be customized based on client requirements.
Table 4. NGC203 Tension Grip Series for Adhesive Strength Testing
Model NGC203B NGC203C NGC203E
Specimen Size 50 mm × 50 mm 3.9″ (100 mm) × 3.9″ (100 mm) 7.9″ (200 mm) × 7.9″ (200 mm)
Maximum Force ≤ 2 kN ≤ 2 kN ≤ 2 kN
Upper Grip Weight 0.36 kg 0.95 kg 7.3 lbs (3.32 kg)
Lower Grip Weight 0.36 kg 0.95 kg 7.3 lbs (3.32 kg)
Working Temp. Ambient
Connection Ø10 mm pin (upper and lower)
Upper Grip Height (A) 60 mm 60 mm 60 mm
Lower Grip Height (B) 60 mm 60 mm 60 mm
Width (C) 50 mm 3.9″ (100 mm) 7.9″ (200 mm)
Bonding Block Count Customizable per client request

The last fixture takes the highest load of the group, 5 kN, on a 70 x 70 mm substrate with a 40 x 40 mm bonded area. It closes the range where an adhesive is strong enough to pull past the 2 kN fixtures.

Model NGC503A

Tension Grip

The NGC503A Tension Grip is a compact fixture designed for precise adhesive strength testing under moderate tensile loads. Supporting forces up to 5 kN, this grip is suited to small-scale bonded specimens, such as those with substrate dimensions of 70 × 70 mm and adhesive layers of 40 × 40 mm. The grip features a shoulder-type clamping mechanism for secure and repeatable alignment during testing. Its lightweight construction and Ø10 mm pin compatibility make it suitable for most tabletop universal testing machines operating in ambient environments.

Tension grip for pull-off testingComponent pull-off fixture
Table 5. NGC503A Tension Grip for Adhesive Testing
Parameter Specification
Application Tension test for adhesives
Maximum Force Capacity ≤ 5 kN
Upper Grip Weight 0.03 kg
Lower Grip Weight 0.16 kg
Working Temperature Ambient
Connection Type Ø10 mm pin (upper and lower)
Upper Grip Height (A) 45 mm
Lower Grip Height (B) 60 mm
Width (C) 90 mm
Clamping Mode Shoulder
Specimen Size Substrate: 70 × 70 mm
Adhesive: 40 × 40 mm

NextGen’s shoulder grip solutions are crafted for high-performance tensile testing where shoulder-type samples are standard. Their modular compatibility with NG-EML and SHM UTM machines ensures maximum utility across labs and testing departments. Contact us today to discuss your testing needs or to request a formal quotation for these fixtures. 

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

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