Hydraulic Wedge Tensile Grips

Overview

• Hydraulic Wedge Grips are designed for secure specimen clamping on universal testing machines and similar tensile-testing systems operating at ambient temperature or in low- and high-temperature environments. Available configurations support ambient-temperature testing, –100 °C to 260 °C, or –100 °C to 500 °C operation. They are particularly suitable for tensile testing of high-strength materials and applications involving high test forces.

• During a test, the hydraulic wedge mechanism delivers sufficient and adjustable clamping force to prevent specimen slippage. The grips combine reliable load transfer with labor-saving operation and high testing efficiency, helping users conduct tensile tests with consistent and repeatable clamping conditions.

Design Features and Benefits

Wide temperature capability:
Suitable for ambient-temperature applications and available for temperature ranges of –100 °C to 260 °C or –100 °C to 500 °C.
High gripping capability:
The jaw hardness can reach HRC 62, supporting reliable clamping for high-strength materials and high-force tensile tests.
Symmetrical load distribution:
The symmetrical design distributes load evenly over the wedge-contact surface, helping to avoid premature specimen failure and inaccurate test results.
Adjustable clamping force:
Hydraulic gripping pressure can be adjusted according to the specimen surface hardness and required tensile load, allowing testing of a broad range of materials.
Impact-resistant and easy to service:
The grips offer good impact resistance, while wedge-jaw replacement is quick and convenient.
Simple, repeatable operation:
Specimen clamping is straightforward and operator-friendly, with low requirements for operating skill and good repeatability.

Jaw Selection Guidance

Below HRC 38:
Standard wedge jaws are recommended.
Above HRC 38:
Please specify the specimen geometry and hardness so that a suitable jaw configuration can be selected.

Application

• These grips are used for tensile-property testing of metallic and other high-strength materials under ambient, low-temperature, or elevated-temperature conditions. They are well suited to testing scenarios where high gripping force, specimen alignment, and resistance to slippage are required.(Note:The applicable temperature range and jaw configuration should be selected according to the specific testing system, specimen geometry, material properties, and test requirements.)

Key Specifications  

Product Name 25 kN Hydraulic Wedge Tensile Grips 25 kN All-Temperature Hydraulic Wedge Tensile Grips
Model FJ-401-2504-000 FJ-404-2504-000
Rated Capacity (kN) kN 25 kN 25 kN
Gripping Range Select suitable wedges according to the specimen Select suitable wedges according to the specimen
Connection Thread M16 M16
Maximum Hydraulic Pressure MPa 21 MPa 21 MPa
Minimum Installed Height of Upper Grip (mm) mm 160 mm 595 mm
Minimum Installed Height of Lower Grip (mm) mm 160 mm 345 mm
Weight per Upper Grip (kg) kg 12 kg 28 kg
Weight per Lower Grip (kg) kg 12 kg 23 kg
Operating Temperature °C Ambient Temperature –100 °C to 260 °C; –100 °C to 500 °C
Wedge Options Drawing No. Gripping Range Jaw Height Jaw Width Drawing No. Gripping Range Jaw Height Jaw Width
V-Notched Wedge mm FJ-401-2504-006A 4-9 42 26 FJ-401-2504-006A 4-9 42 26
FJ-401-2504-006B 9-14 FJ-401-2504-006B 9-14
FJ-401-2504-006C 14-19 FJ-401-2504-006C 14-19
Flat Wedge mm FJ-401-2504-007A 0-7 42 26 FJ-401-2504-007A 0-7 42 26
FJ-401-2504-007B 7-13 FJ-401-2504-007B 7-13
FJ-401-2504-007C 13-19 FJ-401-2504-007C 13-19
Optional Equipment Hydraulic Power Unit Environmental Chamber;    
Hydraulic Power Unit
Product Name 100 kN Hydraulic Wedge Tensile Grips 100 kN All-Temperature Hydraulic Wedge Tensile Grips
Model FJ-401-1005-000 FJ-404-1005-7HJX760-000
Rated Capacity (kN) kN 100 kN 100 kN
Gripping Range Select suitable wedges according to the specimen Select suitable wedges according to the specimen
Connection Thread M33x2.0 M33x2.0
Maximum Hydraulic Pressure MPa 21 MPa 21 MPa
Minimum Installed Height of Upper Grip (mm) mm 193.5 864.5
Minimum Installed Height of Lower Grip (mm) mm 193.5 414.5
Weight per Upper Grip (kg) kg 38 kg 86 kg
Weight per Lower Grip (kg) kg 38 kg 67 kg
Operating Temperature °C Ambient Temperature –100 °C to 260 °C; –100 °C to 500 °C
Wedge Options Drawing No. Gripping Range Jaw Height Jaw Width Drawing No. Gripping Range Jaw Height Jaw Width
V-Notched Wedge mm FJ-401-1005-006A 6-11 63.5 44.5 FJ-401-1005-006A 6-11 63.5 44.5
FJ-401-1005-006B 11-16 FJ-401-1005-006B 11-16
FJ-401-1005-006C 16-21 FJ-401-1005-006C 16-21
FJ-401-1005-006D 21-26 FJ-401-1005-006D 21-26
Flat Wedge mm FJ-401-1005-007A 0-8 63.5 44.5 FJ-401-1005-007A 0-8 63.5 44.5
FJ-401-1005-007B 8-14 FJ-401-1005-007B 8-14
FJ-401-1005-007C 14-20 FJ-401-1005-007C 14-20
FJ-401-1005-007D 20-26 FJ-401-1005-007D 20-26
Composite Flat Wedge    
(Fine Serrations) 		mm FJ-401-1005F-007A 0-8 72 44.5 FJ-401-1005F-007A 0-8 72 44.5
FJ-401-1005F-007B 8-14 FJ-401-1005F-007B 8-14
FJ-401-1005F-007C 14-20 FJ-401-1005F-007C 14-20
Composite Flat Wedge    
(Smooth Face) 		mm FJ-401-1005P-007A 0-7 FJ-401-1005P-007A 0-7
FJ-401-1005P-007B 7-14 FJ-401-1005P-007B 7-14
Water-Cooled Flat Wedge mm FJ-401-1005S-007A 0-8 63.5 44.5 FJ-401-1005S-007A 0-8 63.5 44.5
FJ-401-1005S-007B 8-14 FJ-401-1005S-007B 8-14
FJ-401-1005S-007C 14-20 FJ-401-1005S-007C 14-20
Water-Cooled V-Notched Wedge mm FJ-401-1005S-006A 6-11 63.5 44.5 FJ-401-1005S-006A 6-11 63.5 44.5
FJ-401-1005S-006B 11-16 FJ-401-1005S-006B 11-16
FJ-401-1005S-006C 16-21 FJ-401-1005S-006C 16-21
Wide Flat Wedge mm FJ-401-1005-70W-007A 0-8 63.5 70 FJ-401-1005-70W-007A 0-8 63.5 70
FJ-401-1005-70W-007B 8-14 FJ-401-1005-70W-007B 8-14
FJ-401-1005-70W-007C 14-20 FJ-401-1005-70W-007C 14-20
Wide Composite Flat Wedge    
(Fine Serrations) 		mm FJ-401-1005F-70W-007A 0-8 72 70 FJ-401-1005F-70W-007A 0-8 72 70
FJ-401-1005F-70W-007B 8-14 FJ-401-1005F-70W-007B 8-14
FJ-401-1005F-70W-007C 13-20 FJ-401-1005F-70W-007C 13-20
Wide Composite Flat Wedge    
(Smooth Face) 		mm FJ-401-1005P-70W-007A 0-8 FJ-401-1005P-70W-007A 0-8
FJ-401-1005P-70W-007B 8-14 FJ-401-1005P-70W-007B 8-14
Wide Flat Wedge mm FJ-401-1005-100W-007A 0-8 63.5 100 FJ-401-1005-100W-007A 0-8 63.5 100
FJ-401-1005-100W-007B 8-14 FJ-401-1005-100W-007B 8-14
FJ-401-1005-100W-007C 14-20 FJ-401-1005-100W-007C 14-20
Optional Equipment mm Hydraulic Power Unit Environmental Chamber;    
Hydraulic Power Unit
Product Name 250 kN Hydraulic Wedge Tensile Grips 250 kN All-Temperature Hydraulic Wedge Tensile Grips
Model FJ-401-2505-000 FJ-404-2505-7HJX880-000
Rated Capacity (kN) kN 250 kN 250 kN
Gripping Range Select suitable wedges according to the specimen Select suitable wedges according to the specimen
Connection Thread M42x2.0 M42x2.0
Maximum Hydraulic Pressure MPa 21 MPa 21 MPa
Minimum Installed Height of Upper Grip (mm) mm 250 957
Minimum Installed Height of Lower Grip mm 250 514
Weight per Upper Grip kg 80 kg 180 kg
Weight per Lower Grip (kg) kg 80 kg 147 kg
Operating Temperature °C Ambient Temperature –100 °C to 260 °C; –100 °C to 500 °C
Wedge Options Drawing No. Gripping Range Jaw Height Jaw Width Drawing No. Gripping Range Jaw Height Jaw Width
V-Notched Wedge mm FJ-401-2505-006A 06-14 90 50.8 FJ-401-2505-006A 06-14 90 50.8
FJ-401-2505-006B 12-20 FJ-401-2505-006B 12-20
FJ-401-2505-006C 18-26 FJ-401-2505-006C 18-26
FJ-401-2505-006D 26-34 FJ-401-2505-006D 26-34
Flat Wedge mm FJ-401-2505-007A 0-12 90 50.8 FJ-401-2505-007A 0-12 90 50.8
FJ-401-2505-007B 10-20 FJ-401-2505-007B 10-20
FJ-401-2505-007C 20-30 FJ-401-2505-007C 20-30
Composite Flat Wedge    
(Fine Serrations) 		mm FJ-401-2505F-007A 0-12 90 50.8 FJ-401-2505F-007A 0-12 90 50.8
FJ-401-2505F-007B 10-20 FJ-401-2505F-007B 10-20
Composite Flat Wedge    
(Smooth Face) 		mm FJ-401-2505P-007A 0-12 90 50.8 FJ-401-2505P-007A 0-12 90 50.8
FJ-401-2505P-007B 10-20 FJ-401-2505P-007B 10-20
Water-Cooled Flat Wedge mm FJ-401-2505S-007A 0-12 90 50.8 FJ-401-2505S-007A 0-12 90 50.8
FJ-401-2505S-007B 10-20 FJ-401-2505S-007B 10-20
FJ-401-2505S-007C 20-30 FJ-401-2505S-007C 20-30
Water-Cooled V-Notched Wedge mm FJ-401-2505S-006A 6-14 FJ-401-2505S-006A 6-14
FJ-401-2505S-006B 12-20 FJ-401-2505S-006B 12-20
FJ-401-2505S-006C 18-26 FJ-401-2505S-006C 18-26
FJ-401-2505S-006D 26-34 FJ-401-2505S-006D 26-34
Wide Flat Wedge mm FJ-401-2505-70W-007A 0-12 90 70 FJ-401-2505-70W-007A 0-12 90 70
FJ-401-2505-70W-007B 10-20 FJ-401-2505-70W-007B 10-20
FJ-401-2505-70W-007C 20-30 FJ-401-2505-70W-007C 20-30
Wide Composite Flat Wedge    
(Fine Serrations) 		mm FJ-401-2505F-70W-007A 0-12 FJ-401-2505F-70W-007A 0-12
FJ-401-2505F-70W-007B 10-20 FJ-401-2505F-70W-007B 10-20
Wide Composite Flat Wedge    
(Smooth Face) 		mm FJ-401-2505P-70W-007A 0-12 FJ-401-2505P-70W-007A 0-12
FJ-401-2505P-70W-007B 10-20 FJ-401-2505P-70W-007B 10-20
Wide Flat Wedge mm FJ-401-2505-100W-007A 0-12 90 100 FJ-401-2505-100W-007A 0-12 90 100
FJ-401-2505-100W-007B 10-20 FJ-401-2505-100W-007B 10-20
FJ-401-2505-100W-007C 20-30 FJ-401-2505-100W-007C 20-30
FJ-401-2505-100W-007D 30-40 FJ-401-2505-100W-007D 30-40
Optional Equipment mm Hydraulic Power Unit Environmental Chamber;    
Hydraulic Power Unit
Product Name 500 kN Hydraulic Wedge Tensile Grips
Model FJ-401-5505-0000
Rated Capacity (kN) kN 500 kN
Gripping Range Select suitable wedges according to the specimen
Connection Thread M72x2.0
Maximum Hydraulic Pressure MPa 63 MPa
Minimum Installed Height of Upper Grip (mm) mm 284 mm
Minimum Installed Height of Lower Grip (mm) mm 284 mm
Weight per Upper Grip (kg) kg 140 kg
Weight per Lower Grip (kg) kg 140 kg
Operating Temperature °C Ambient Temperature
Wedge Options Drawing No. Gripping Range Jaw Height Jaw Width
V-Notched Wedge mm FJ-401-5005-006A 6.5-15.5 95.5 101.6
FJ-401-5005-006B 15-24.5
FJ-401-5005-006C 24-33.5
FJ-401-5005-006D 33-42.5
FJ-401-5005-006E 42-51.5
Flat Wedge mm FJ-401-5005-007A 0-11 95.5 101.6
FJ-401-5005-007B 10-21
FJ-401-5005-007C 20-31
FJ-401-5005-007D 30-41
FJ-401-5005-007E 40-51
Optional Equipment Hydraulic Power Unit
Product Name 1000 kN Hydraulic Wedge Tensile Grips
Model FJ-401-1006-0000
Rated Capacity (kN) kN 1200 kN
Gripping Range Select suitable wedges according to the specimen
Connection Thread M100x3.0
Maximum Hydraulic Pressure MPa 63 MPa
Minimum Installed Height of Upper Grip (mm) mm 500
Minimum Installed Height of Lower Grip (mm) mm 487
Weight per Upper Grip (kg) kg 335 kg
Weight per Lower Grip (kg) kg 335 kg
Operating Temperature °C –100 °C to 260 °C; –100 °C to 500 °C
Wedge Options Drawing No. Gripping Range Jaw Height Jaw Width
V-Notched Wedge mm FJ-401-1206-006A 6-10 127 127
FJ-401-1206-006B 10-25
FJ-401-1206-006C 25-44
FJ-401-1206-006D 44-63
Flat Wedge mm FJ-401-1206-007A 0-23 127 127
FJ-401-1206-007B 23-45
FJ-401-1206-007C 45-67
Optional Equipment mm Environmental Chamber;    
Hydraulic Power Unit

Option

Hydraulic Power Unit (HPU) Overview

The Hydraulic Power Unit (HPU) adopts a servo motor–internal gear pump configuration, providing low-noise operation and a wide pressure-adjustment range. An intermittent-start control strategy minimizes temperature rise and energy consumption. The unit is controlled through a touchscreen HMI integrated with a PLC, ensuring intuitive operation and strong system expandability.

Hydraulic Power Unit (HPU) Key Features

• Low-noise operation
• Visually displayed and adjustable clamping force
• Low heat generation
• Energy-efficient operation

Main Technical Specifications:

Parameter Specification
Pressure Adjustment Range 0.5–19 MPa
Flow Rate Adjustment Range 1.5–4.5 L/min
Rated Voltage 380 V
Motor Power 1.5 kW
Maximum Temperature Rise 10 °C
Peak Noise Level ≤ 65 dB
Standby Noise Level ≤ 55 dB
Overall Dimensions (W × D × H) 560 × 560 × 1100 mm

Why Choose Us?

  • •  We provide 7×24 technical consultation, operator training, and timely software updates.

  • •  We offer remote monitoring of equipment status, enabling rapid diagnosis and resolution when abnormalities occur.

  • •  Keeping up with the latest development of widely adopted international standards from ASTM, ISO, etc. to ensureyour test results relevant and credible

  • •  Maximizing your lab investment returns with tailored solutions to your unique needs from cost effective hardware tosoftware customization

  • •  We treat everyone, be it clients, colleagues or partners, with honesty and sincerity.

  • •  Staying at the forefront of testing technologies that continuously improve test accuracy, repeatability, and eficiency


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