Standards
Precision Wedge Grips for High-Strength Tensile Testing
NextGen’s wedge tensile grips are engineered to deliver superior performance in tensile strength testing using Universal Testing Machines (UTMs). These grips use a mechanical wedge action that enhances gripping pressure proportionally with the applied tensile force, for firm specimen clamping and minimizing slippage during testing. Built for rigorous tensile tests, these fixtures support compliance with global standards such as ASTM E8, ISO 6892, ISO 527, DIN 50125, and are suitable for metallic and composite materials.
These grips are compatible with NG-EML and NG-SHM series universal testing machines, providing a reliable solution for laboratories and industrial applications in automotive, aerospace, civil engineering, and materials R&D.
Wedge Grip Models
Nine grips work the same way - the jaws ride on a wedge, so the pull itself drives them in and the hold tightens as the load rises. What separates them is capacity and body, and each carries two jaw-face tables: one for flat specimens by thickness, one for round ones by diameter. The range opens at 20 kN.
Model NGA204G
Wedge Action Tensile Grip
The NGA204G Wedge Action Tensile Grip is engineered for tension testing of flat and round specimens made from metal, plastic, and composite materials. With a rated capacity of 20 kN and a wide thermal working range from - 73 °C to +315 °C, it offers stable clamping and self-tightening grip performance during test loading. Designed for specimens with hardness under 30 HRC and tensile strength below 600 MPa, the NGA204G is suited to a range of moderate-force testing environments requiring precision and versatility.
Table 1. NGA204G Wedge Action Grip for Flat and Round Specimens
| Parameter |
Specification |
| Application |
Tension test for flat and round specimen of metal, composite, plastic |
| Maximum Force Capacity |
20 kN |
| Upper Grip Weight |
11 lbs (5.0 kg) |
| Lower Grip Weight |
11 lbs (5.0 kg) |
| Working Temperature |
- 73 °C to +315 °C |
| Connection Type |
Ø10 mm pin (upper and lower) |
| Height (A) |
7.6″ (192 mm) |
| Grip Body Width (B) |
5″ (128 mm) |
| Overall Width (C) |
12.4″ (316 mm) |
| Note |
Specimen hardness <30 HRC; Tensile strength <600 MPa |
Dimensions A, B and C used in Table 1. The NGA204G grip supports a modular set of jaw faces tailored for various specimen dimensions and forms. Both flat and Vee-type jaws are available for tension testing of rectangular and cylindrical specimens. Each jaw face is precision-machined with a 1.5 mm pitch serration to optimize grip force distribution and minimize slippage.
Flat Jaw Faces (Optional)
Table 2. Optional Jaw Faces for NGA204G Wedge Action Grip
| No. |
Specimen Thickness (mm) |
Height A (mm) |
Width B (mm) |
| NGA204G-13 |
0 - 6 |
40 |
40 |
| NGA204G-14 |
6 - 12 |
40 |
40 |
Jaw Faces for NGA204G Wedge Action Grip
Note: All flat jaw faces have a pitch of 1.5 mm.
Vee Jaw Faces (Optional)
Table 3. Optional Jaw Faces for NGA204G Wedge Action Grip
| No. |
Specimen Diameter (mm) |
Height A (mm) |
Width B (mm) |
| WXSA204G-15 |
Φ4 - Φ9 |
40 |
40 |
| WXSA204G-16 |
Φ9 - Φ14 |
40 |
40 |
Note: All vee jaw faces have a pitch of 1.5 mm.
The same grip at 30 kN.
Model NGA304A
Wedge Action Tensile Grip
The NGA304A Wedge Action Grip is built for reliable tensile testing of flat and round specimens made from metal, composite, and rigid plastic. With a force capacity of up to 30 kN, this system offers balanced grip performance for mid-range test applications. The wedge-action design provides automatic tightening as tensile force is applied, for consistent holding force throughout the test. This model is suitable for materials with a hardness below 30 HRC and tensile strength below 600 MPa, making it suited to quality control and research labs.
Table 4. NGA304A Wedge Action Grip for Mid-Range Specimens
| Parameter |
Specification |
| Application |
Tension test for flat and round specimen of metal, composite, rigid plastic |
| Maximum Force Capacity |
30 kN |
| Upper Grip Weight |
17 lbs (7.6 kg) |
| Lower Grip Weight |
17 lbs (7.6 kg) |
| Working Temperature |
Ambient |
| Connection Type |
Ø10 mm pin (upper and lower) |
| Height (A) |
9.4″ (240 mm) |
| Grip Body Width (B) |
6.9″ (174 mm) |
| Overall Width (C) |
13.6″ (346 mm) |
| Note |
Specimen hardness <30 HRC; Tensile strength <600 MPa |
To accommodate many specimen sizes and profiles, the NGA304A grip supports both flat and vee jaw faces. Each jaw face is precision-machined with a 1.5 mm pitch serration to provide enhanced gripping and alignment during tensile testing.
Flat Jaw Faces (Optional)
Table 5. Optional Jaw Faces for NGA304A Wedge Action Grip
| No. |
Specimen Thickness (mm) |
Height A (mm) |
Width B (mm) |
| NGA105A-13 |
0 - 7 |
55 |
40 |
| NGA105A-14 |
7 - 14 |
55 |
40 |
| NGA105A-15 |
14 - 21 |
55 |
40 |
Jaw Faces for NGA304A Wedge Action Grip
Note: All flat jaw faces have a pitch of 1.5 mm.
Vee Jaw Faces (Optional)
Table 6. Optional Jaw Faces for NGA304A Wedge Action Grip
| No. |
Specimen Diameter (mm) |
Height A (mm) |
Width B (mm) |
| WXSA105A-09 |
Φ4 - Φ9 |
55 |
40 |
| WXSA105A-10 |
Φ9 - Φ14 |
55 |
40 |
| WXSA105A-11 |
Φ14 - Φ19 |
55 |
40 |
Note: All vee jaw faces have a pitch of 1.5 mm.
At 50 kN, where sheet metal and bar start rather than plastics.
Model NGA504A
Wedge Action Tensile Grip
The NGA504A Wedge Tensile Grip is built for high-capacity tensile testing of both flat and round specimens made from rigid plastic, composite, and metal materials. Supporting a force capacity of up to 50 kN and featuring a wedge-action mechanism, it ensures self-tightening engagement under load for stable and repeatable test conditions. This model is suited to labs testing medium- to high-strength specimens with hardness under 30 HRC and tensile strength below 600 MPa.
Table 7. NGA504A Wedge Action Grip
| Parameter |
Specification |
| Application |
Tension test for flat and round specimen of metal, composite, rigid plastic |
| Maximum Force Capacity |
50 kN |
| Upper Grip Weight |
23 lbs (10.6 kg) |
| Lower Grip Weight |
23 lbs (10.6 kg) |
| Working Temperature |
Ambient |
| Connection Type |
Ø18 mm pin (upper and lower) |
| Height (A) |
9.3″ (236 mm) |
| Grip Body Width (B) |
7″ (178 mm) |
| Overall Width (C) |
13.3″ (337 mm) |
| Note |
Specimen hardness <30 HRC; Tensile strength <600 MPa |
The NGA504A grip system supports an interchangeable range of serrated jaw faces to accommodate a variety of specimen shapes and sizes. Optional flat and vee-type jaw faces are available for tension testing of rectangular and cylindrical samples. Each jaw is machined with a 1.5 mm serration pitch to ensure precise alignment and secure clamping throughout the test cycle.
Flat Jaw Faces (Optional)
Table 8. Optional Jaw Faces for NGA504A Wedge Action Grip
| No. |
Specimen Thickness (mm) |
Height A (mm) |
Width B (mm) |
| NGA105A-13 |
0 - 7 |
55 |
40 |
| NGA105A-14 |
7 - 14 |
55 |
40 |
| NGA105A-15 |
14 - 21 |
55 |
40 |
Jaw Faces for NGA504A Wedge Action Grip
Note: All flat jaw faces have a pitch of 1.5 mm.
Vee Jaw Faces (Optional)
Table 9. Optional Jaw Faces for NGA504A Wedge Action Grip
| No. |
Specimen Diameter (mm) |
Height A (mm) |
Width B (mm) |
| NGA105A-16 |
Φ4 - Φ9 |
55 |
40 |
| NGA105A-17 |
Φ9 - Φ14 |
55 |
40 |
| NGA105A-18 |
Φ14 - Φ19 |
55 |
40 |
Note: All vee jaw faces have a pitch of 1.5 mm.
At 100 kN.
Model NGA105A
Wedge Action Tensile Grip
The NGA105A Wedge Tensile Grip is a high-capacity solution engineered for tensile testing of both flat and round metal and composite specimens. With a maximum force rating of 100 kN, this grip utilizes a self-tightening wedge mechanism to maintain a firm and consistent hold throughout the loading cycle. Its heavy-duty construction and Ø18 mm pin connection make it a reliable component for demanding test applications. Suitable for specimens with hardness below 30 HRC and tensile strength under 600 MPa, this system ensures accuracy and repeatability across a broad range of materials.
Table 10. NGA105A Wedge Action Grip
| Parameter |
Specification |
| Application |
Tension test for flat and round specimen of metal, composite |
| Maximum Force Capacity |
100 kN |
| Upper Grip Weight |
32 lbs (14.7 kg) |
| Lower Grip Weight |
32 lbs (14.7 kg) |
| Working Temperature |
Ambient |
| Connection Type |
Ø18 mm pin (upper and lower) |
| Height (A) |
10.9″ (276 mm) |
| Grip Body Width (B) |
6.5″ (164 mm) |
| Overall Width (C) |
13.8″ (350 mm) |
| Note |
Specimen hardness <30 HRC; Tensile strength <600 MPa |
To accommodate many specimen geometries, the NGA105A grip offers multiple interchangeable jaw face options. Each set is engineered with a 1.5 mm pitch for consistent and secure clamping. The available types include both flat and vee jaw faces, making this grip system suited to flat and round specimens of varying sizes.
Flat Jaw Faces (Optional)
Table 11. Optional Jaw Faces - NGA105A Grip
| No. |
Specimen Thickness |
Height A (mm) |
Width B (mm) |
| NGA105A-13 |
0 - 7 mm |
55 |
40 |
| NGA105A-14 |
7 - 14 mm |
55 |
40 |
| NGA105A-15 |
14 - 21 mm |
55 |
40 |
Jaw Faces, NGA105A Grip
Note: All flat jaw faces have a pitch of 1.5 mm.
Vee Jaw Faces (Optional)
Table 12. Optional Jaw Faces - NGA105A Grip
| No. |
Specimen Diameter |
Height A (mm) |
Width B (mm) |
| NGA105A-16 |
Φ4 - 9 mm |
55 |
40 |
| NGA105A-17 |
Φ9 - 14 mm |
55 |
40 |
| NGA105A-18 |
Φ14 - 19 mm |
55 |
40 |
Note: All vee jaw faces have a pitch of 1.5 mm.
The heaviest of the series, 300 kN. Past this the frame is the limit, not the grip.
Model NGA305A
Wedge Tensile Grip
The NGA305A Wedge Tensile Grip is engineered for high-capacity tensile testing of flat and round specimens made from metal and composite materials. Its heavy-duty wedge-action clamping mechanism ensures secure and repeatable specimen alignment during demanding test conditions. Designed for universal testing machines, this grip accommodates heavy-duty applications requiring force levels up to 300 kN.
Table 13. NGA305A Wedge Tensile Grip
| Parameter |
Specification |
| Application |
Tension testing for flat and round specimens of metal, composite |
| Maximum Force Capacity |
≤ 300 kN |
| Connection Type |
Upper Grip: Φ28 mm pin
Lower Grip: Φ28 mm pin |
| Overall Height (A) |
14.4″ (367 mm) |
| Grip Body Width (B) |
9.6″ (244 mm) |
| Overall Width (C) |
15.4″ (392 mm) |
| Working Temperature |
Ambient |
| Grip Weight |
Upper Grip: 80 lbs (36.5 kg)
Lower Grip: 80 lbs (36.5 kg) |
| Note |
Specimen hardness below 30 HRC and tensile strength below 600 MPa |
To support a broader range of specimen dimensions, the NGA305A grip is available with interchangeable flat and vee jaw face options. Each jaw face is precisely engineered with a 2.5 mm pitch to guarantee secure and uniform specimen clamping. These options make the grip system well-suited for both flat and round tensile specimens across various sizes.
Flat Jaw Faces (Optional)
Table 14. Optional Jaw Faces - NGA305A Grip
| No. |
Specimen Thickness |
Height A (mm) |
Width B (mm) |
| NGA305A-14 |
0 - 8 mm |
62 |
50 |
| NGA305A-15 |
8 - 16 mm |
62 |
50 |
| NGA305A-16 |
16 - 24 mm |
62 |
50 |
| NGA305A-17 |
24 - 32 mm |
62 |
50 |
Jaw Faces, NGA305A Grip Note: All flat jaw faces have a pitch of 2.5 mm.
Vee Jaw Faces (Optional)
Table 15. Optional Jaw Faces - NGA305A Grip
| No. |
Specimen Diameter |
Height A (mm) |
Width B (mm) |
| NGA305A-18 |
Φ4 - 9 mm |
62 |
50 |
| NGA305A-19 |
Φ9 - 16 mm |
62 |
50 |
| NGA305A-20 |
Φ16 - 23 mm |
62 |
50 |
| NGA305A-21 |
Φ23 - 30 mm |
62 |
50 |
Note: All vee jaw faces have a pitch of 2.5 mm.
The last four are a second body style at the lower end of the range. This one holds 20 kN.
Model NGB204A
Wedge Tensile Grip
The NGB204A Wedge Tensile Grip is a high-strength clamping solution designed for flat and round specimens made from metals, composites, and plastics. This wedge-action grip securely tightens under load, delivering consistent tension without slippage. With a heavy-duty design and compatibility with standard UTM systems, the NGB204A is well-suited for demanding tensile applications in controlled environments.
Table 16. NGB204A Wedge Tensile Grip
| Parameter |
Specification |
| Application |
Tension test for flat and round specimen of metal, composite, plastic |
| Maximum Force Capacity |
≤ 20 kN |
| Connection Type |
Upper Grip: Φ10 mm pin
Lower Grip: Φ10 mm pin |
| Overall Height (A) |
6.4″ (162 mm) |
| Grip Body Width (B) |
4.4″ (111 mm) |
| Overall Width (C) |
4.4″ (111 mm) |
| Working Temperature |
Ambient |
| Grip Weight |
Upper Grip: 9.5 lbs (4.3 kg)
Lower Grip: 17 lbs (7.8 kg) |
| Note |
Specimen hardness below 30 HRC and tensile strength below 600 MPa |
To accommodate various specimen geometries, the NGB204A grip is available with interchangeable flat and vee jaw faces. These optional inserts are engineered for reliable clamping of both flat and round specimens across different size ranges. Each jaw face is designed with consistent pitch for optimal grip performance.
Flat Jaw Faces (Optional)
Table 17. Optional Jaw Faces - NGB204A Grip
| No. |
Specimen Thickness (mm) |
Height A (mm) |
Width B (mm) |
| NGB204A-09 |
0 - 6 |
40 |
40 |
| NGB204A-10 |
6 - 12 |
40 |
40 |
Jaw Faces, NGB204A Grip
Note: All flat jaw faces have a pitch of 1.5 mm.
Vee Jaw Faces (Optional)
Table 18. Optional Jaw Faces - NGB204A Grip
| No. |
Specimen Diameter (mm) |
Height A (mm) |
Width B (mm) |
| WXSB204A-11 |
Φ4 - 9 |
40 |
40 |
| WXSB204A-12 |
Φ9 - 14 |
40 |
40 |
Note: All vee jaw faces have a pitch of 2.0 mm.
The same 20 kN in the G variant, with its own jaw faces.
Model NGB204G
Wedge Tensile Grip
The NGB204G Wedge Tensile Grip is a precision wedge-action grip designed for flat and round specimens made of metal, composite, and plastic. Built to withstand extreme temperatures, it is suited to testing under both cryogenic and high-heat conditions. The symmetrical design of the upper and lower grips allows for uniform clamping, for consistent and reliable tensile results.
- Application: Tension tests for flat and round specimens of metal, composite, and plastic materials.
- Maximum Capacity: Up to 20 kN load.
- Grip Weight: 8.3 lbs (3.76 kg) each (upper and lower grip).
- Connection: Φ10 mm pin (upper and lower), fully compatible with standard UTM systems.
- Dimensions:
- Height (A): 4.9″ (123.5 mm)
- Grip Body Width (B): 4.3″ (108 mm)
- Overall Width (C): 5.5″ (140 mm)
- Working Temperature: - 73 °C to +315 °C.
- Material Compatibility: For specimens with hardness below 30 HRC and tensile strength below 600 MPa.
Table 19. NGB204G Wedge Tensile Grip
| Parameter |
Specification |
| Application |
Tension test for flat and round specimen of metal, composite, plastic |
| Maximum Force Capacity |
≤ 20 kN |
| Connection Type |
Upper Grip: Φ10 mm pin
Lower Grip: Φ10 mm pin |
| Overall Height (A) |
4.9″ (123.5 mm) |
| Grip Body Width (B) |
4.3″ (108 mm) |
| Overall Width (C) |
5.5″ (140 mm) |
| Working Temperature |
- 73 °C to +315 °C |
| Grip Weight |
Upper Grip: 8.3 lbs (3.76 kg)
Lower Grip: 8.3 lbs (3.76 kg) |
| Note |
Specimen hardness below 30 HRC and tensile strength below 600 MPa |
The NGB204G grip supports interchangeable flat and vee jaw faces to provide reliable clamping across different specimen shapes and sizes. Designed for compatibility and precise alignment, these optional jaw inserts enable optimal grip for various testing scenarios, especially under extreme temperature conditions.
Flat Jaw Faces (Optional)
Table 20. Optional Jaw Faces - NGB204G Grip
| No. |
Specimen Thickness (mm) |
Height A (mm) |
Width B (mm) |
| NGB204G-09 |
0 - 6 |
40 |
40 |
| NGB204G-10 |
6 - 12 |
40 |
40 |
Jaw Faces, NGB204G Grip
Note: All flat jaw faces have a pitch of 1.5 mm.
Vee Jaw Faces (Optional)
Table 21. Optional Jaw Faces - NGB204G Grip
| No. |
Specimen Diameter (mm) |
Height A (mm) |
Width B (mm) |
| NGA204G-11 |
Φ4 - 9 |
42 |
4 |
| NGA204G-12 |
Φ9 - 14 |
42 |
4 |
Note: All vee jaw faces have a pitch of 2.0 mm.
The lightest of them all at 10 kN.
Model NGD104A
Wedge Tensile Grip
The NGD104A Wedge Tensile Grip features a self-tightening wedge mechanism designed for secure clamping of flat and round specimens made from metals, composites, and plastics. With equal upper and lower grip weights, this grip ensures stable and balanced tension application, making it suitable for routine tensile testing under ambient conditions.
Table 22. NGD104A Wedge Tensile Grip
| Parameter |
Specification |
| Application |
Tension test for flat and round specimen of metal, composite, plastic |
| Maximum Force Capacity |
≤ 10 kN |
| Connection Type |
Upper Grip: Φ10 mm pin
Lower Grip: Φ10 mm pin |
| Grip Body Width (A) |
9.4″ (240 mm) |
| Height (B) |
5.8″ (148 mm) |
| Depth (C) |
72 mm |
| Working Temperature |
Ambient |
| Grip Weight |
Upper Grip: 21 lbs (9.67 kg)
Lower Grip: 21 lbs (9.67 kg) |
| Note |
Specimen hardness below 30 HRC and tensile strength below 600 MPa |
Dimensions A, B and C used in Table 22. The NGD104A grip includes a selection of optional flat and vee jaw faces to accommodate different specimen types and sizes. These jaw faces ensure a secure and stable grip for both flat and round specimens in standard tensile testing applications.
Flat Jaw Faces (Optional)
Table 23. Optional Jaw Faces - NGD104A Grip
| No. |
Specimen Thickness (mm) |
Height A (mm) |
Width B (mm) |
| NGD104A.01-19 |
0 - 10 |
54 |
40 |
Jaw Faces, NGD104A Grip
Vee Jaw Faces (Optional)
Table 24. Optional Jaw Faces - NGD104A Grip
| No. |
Specimen Diameter (mm) |
Height A (mm) |
Width B (mm) |
| NGD104A.01-20 |
Φ4 - 9 |
54 |
40 |
| NGD104A.01-21 |
Φ9 - 16 |
54 |
40 |
And a 100 kN grip in this body for medium-to-heavy duty work, closing the page.
Model NGA105A
Wedge Tensile Grip
The NGA105A Wedge Tensile Grip features a high-capacity self-tightening wedge design suitable for demanding tensile testing applications. With equal upper and lower grip weights and heavy-duty geometry, this grip is suited to specimens requiring force up to 100 kN. It supports flat and round specimens with moderate hardness and tensile strength, making it reliable for various material testing needs.
Table 25. NGA105A Wedge Tensile Grip
| Parameter |
Specification |
| Application |
Medium-to-heavy duty use |
| Maximum Force Capacity |
≤ 100 kN |
| Connection Type |
Upper Grip: Φ10 mm pin
Lower Grip: Φ10 mm pin |
| Width (A) |
7.8″ (198 mm) |
| Grip Body Height (B) |
11.8″ (300 mm) |
| Working Temperature |
Ambient |
| Grip Weight |
Upper Grip: 30 lbs (13.7 kg)
Lower Grip: 30 lbs (13.7 kg) |
| Note |
Specimen hardness below 30 HRC and tensile strength below 600 MPa |
The NGA105A grip offers a broad selection of flat and vee jaw faces designed to accommodate many specimen sizes. With consistent dimensions and reliable grip integrity, these jaw inserts are suited to high-capacity tensile testing across varied material shapes and diameters.
Flat Jaw Faces (Optional)
Table 26. Optional Jaw Faces - NGA105A Grip
| No. |
Specimen Thickness (mm) |
Height A (mm) |
Width B (mm) |
| NGA105A-12 |
0 - 10 |
70 |
64 |
| NGA105A-13 |
10 - 20 |
70 |
64 |
| NGA105A-14 |
20 - 30 |
70 |
64 |
| NGA105A-15 |
30 - 40 |
70 |
64 |
| NGA105A-20 |
40 - 50 |
70 |
64 |
Jaw Faces, NGA105A Grip Vee Jaw Faces (Optional)
Table 27. Optional Jaw Faces - NGA105A Grip
| No. |
Specimen Diameter (mm) |
Height A (mm) |
Width B (mm) |
| NGA105A-16 |
Φ4 - Φ10 |
70 |
64 |
| NGA105A-17 |
Φ10 - Φ20 |
70 |
64 |
| NGA105A-18 |
Φ20 - Φ30 |
70 |
64 |
| NGA105A-19 |
Φ30 - Φ40 |
70 |
64 |
| NGA105A-09 |
Φ48 |
70 |
64 |
| NGA105A-10 |
Φ60 |
70 |
64 |
For Laboratories
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