Xforce Load Cells

Patented Xforce load cells—exclusively from Zwick Roell

Xforce load cells are ideal for tensile tests, compression tests, and flexure tests as well as for cyclic tests with zero crossing. The highly accurate patented Xforce load cells are used for all our load frame series. We make no compromises when it comes to quality.

Xforce load cell

Significant Advantages and Features

Advantages and features

  • Xforce load cells are based on a rotation-symmetrical or axis-symmetrical design principle, making them highly resistant to transverse forces.
  • All Xforce load cells are highly insensitive to parasitic influences such as transverse forces, bending moments, torque, and temperature variations.
  • Xforce load cells are very robust and can withstand loads up to 300% of nominal capacity without mechanical failure and up to 150% without zero-point shift.
  • These intelligent load cells have a unique electronic identification system stored on an internal EEPROM.
  • Xforce load cells fulfill all five criteria of the ISO 7500-1 accuracy classes over a very large measurement range.

The heart of the testing system

Xforce load cells—the heart of the testing system

High-quality load cells are essential for achieving reliable, interpretable test results. To ensure that this core element is optimally integrated in the testing system, Zwick Roell has developed its own series of load cells: Xforce P (Precision), Xforce HP (High Precision), and Xforce K

  • The highly accurate Xforce P load cells are intended for use in tests which do not involve high transverse forces. This includes many tensile tests (though not on shear specimens, for example) as well as compression, flexure, and component tests in which no high transverse forces, bending moments, or torsional moments occur.
  • Xforce HP and Xforce K differ from Xforce P load cells primarily in their larger measurement range and greater resistance to parasitic influences, such as bending moments, torsional moments, and temperature variations. They are ideally suited to all static tensile, compression and flexure tests and are equally suitable for pulsating or cyclic tests with zero crossing.
  • Before dispatch, each load cell is calibrated with the testing machine plus drive and the measurement and control electronics as a complete system. This is recorded in the supplied factory calibration certificate.

All components from a single source: Zwick Roell develops and produces all system components in-house: testXpert II testing software, testControl measurement and control electronics, Xforce load cells, and all mechanical components.

Tips

Tips for optimal test results

Xforce load cell alignment
Xforce load cell alignment
  • Connections between the load cell and the components attached to the system, together with the test fixtures, should be as rigid and free of play as possible. This is because load cells frequently have to measure forces which change rapidly.
  • The smaller the test arrangement and therefore the lower the height, the fewer lever-arm effects will arise. Adapter units and extensions in particular generate undesirable lever-arm effects.
  • Lever arms and eccentricities should be avoided as far as possible in order to minimize bending moments. The further away from the test axis the force application point is, the greater is the influence of the bending moments.
  • Test fixtures/specimen grips and specimen must be aligned exactly to the test axis to enable controlled force application and distribution in the specimen to allow reliable, informative test results to be obtained.
    Alternatively, swiveling or spherical connections can be used to allow test fixtures to self-align and adapt to the specimen.
  • If several load cells are in use, or in the event of frequent load cell changes, we recommend use of the 2nd load cell connection option.
    Alignment to the test axis is better via the plug-in system than via the usual threaded mounting, while reference positions for different test arrangements are also re-attained automatically. With the threaded fastening the reference positions change according to the number of turns. In addition, installation and removal is considerably easier with the plug-in system, which also avoids unnecessary strain on the load-cell cables.
  • Protect the load cell against overloadby adjusting the force thresholds in line with the test sequence. The testing system switches off automatically if these force thresholds are reached.
    They can be set either directly on the testing system as hardware limit switches or in the testing software as software limit switches. In the case of tests in which set force-thresholds are not sufficient to exclude the risk of damage to the load cell, we recommend overload protection.
  • The ambient temperature must be kept broadly constant during the test to avoid the measurement signal being influenced by temperature fluctuations.

Self-identifying sensor plug

  • These intelligent load cells have a unique electronic identification system stored on an internal EEPROM.
  • The testXpert III testing software automatically identifies the sensor type and properties.
  • Force and travel limits are automatically imported.
  • Sensor overloads plus date are stored in the EEPROM.

Xforce Load Cells at a Glance

3:14

Patented Xforce load cells – exclusively from Zwick Roell

Xforce load cells are ideal for tensile tests, compression tests, and flexure tests as well as for cyclic tests with zero crossing.

Calibration and Accuracy to ISO 7500-1

ISO 7500 metallic materials—Verification of static uniaxial testing machines consists of two parts:

  • ISO 7500-1: Tension/compression testing machines—Verification and calibration of the force-measuring system
  • ISO 7500-2: Tension creep testing machines—Verification of the applied force

ISO 7500-1 contains general information on requirements for and on the verification and calibration of tensile, compression and flexure testing machines; spring testing machines and fatigue testing machines.

Accuracy to ISO 7500-1

  • All data apply to measured values in compression and tension directions.
  • All load cells are calibrated up to the relevant nominal force Fnom and satisfy the requirements of the following standards: EN ISO 7500 -1, EN ISO 7500 -2, ASTM E4.
  • Xforce load cells satisfy the calibration requirements and all five criteria of the ISO 7500-1 accuracy classes over a very large measurement range.
  • Accuracy Class 1: Xforce HP and Xforce K load cells satisfy the requirements of all five criteria from as little as 0.2% of nominal force, Xforce P load cells from 0.4% of nominal force.
  • Accuracy Class 0.5: all Xforce load cells satisfy the requirements of the five criteria from 1% or 2% of nominal force.

System calibration and large measurement range

System calibration

Before dispatch each load cell is calibrated with the testing system plus drive and the measurement and control electronics as a complete system. This is recorded in the accompanying factory calibration certificate.

Large measurement range

  • The large measurement range frequently eliminates the need to purchase a second load cell, saving the costs of acquisition and annual calibration.
  • Even with high pre-loads due to heavy test fixtures or specimen grips, virtually the entire load-cell measurement-range remains available. The load cell can still be used to full nominal capacity with fixture weights amounting to 45 % of nominal force.

Outstanding linearity

  • Xforce HP and Xforce K load cells feature very high accuracy.
  • Used in conjunction with testControl, Xforce HP and Xforce K (from 200 N) load cells typically offer significantly better linearity (= relative display deviation) than required by ISO 7500.
  • The maximum display deviation is less than 1% of the measured value from as low as 0.1% of the load cell nominal capacity; from 0.4% of nominal capacity it is 0.25% of the measured value.

Overload protection, force limits and operating force

  • These load cells are extremely robust, with a high operating force. This means that overload protection such as pre-loaded springs, mechanical stops or guiders to absorb transverse forces is generally unnecessary.
  • Xforce load cells are very robust and can withstand loads up to 300% of nominal capacity without mechanical failure and up to 150% without zero-point shift.
  • Xforce HP load cells in the 5 - 100N range also feature integrated overload protection to safeguard them against higher overloads (tensile forces, compression forces, bending moments etc.).
  • The crosshead travel range can be restricted via software and hardware limit stops, protecting load cells and text fixtures.
  • Force limits can be set in testXpert II to switch off the testing system automatically, protecting the load cell.
  • Xforce HP+ and K+ have a usable operating range (incl. tare) of 120%.

Mounting Studs—Fast and Easy Connections 

Xforce load cell connector system
Xforce load cell connection of second load cell

Fast load-cell change

  • If several load cells are to be used, or in the event of frequent load cell changes, we recommend the 'Connection via Mounting Stud' option.
  • Saves time and increases flexibility.
  • Avoids unnecessary strain on the load-cell cable during screwing in and unscrewing.
  • The plug-in system delivers better alignment to the test axis than the usual threaded mounting.
  • Reference positions for different test arrangements are automatically re-attained (with a threaded mounting, reference positions change according to the number of turns screwed in).
Xforce load cell with second mounting stud

Simple mechanical plug-in system, including for two test areas

  • Each load cell is equipped with a precision-fit mounting stud, allowing fast, play-free fitting of specimen grips and test fixtures, with optimum alignment to the test axis.
  • Reference positions (e.g. test-fixture separation) are set up just once by the operator and are stored in the test environment of the testXpert II testing software. This reference position is automatically and exactly re-attained after each fixture change. It doesn't get more convenient than that!
  • With Xforce K load cells a second mounting-stud can optionally be used, allowing use in two test areas.

Xforce Load Cell Design and Construction

  • All Xforce load cells are based on a rotation-symmetrical or axis-symmetrical design principle, making them highly resistant to transverse forces.
  • The low overall height enables shorter test arrangements, which means shorter lever arms.
  • The design results in high operating forces, very small measurement travel, and high stiffness.
  • A high-quality shielded measurement cable with sensor plug provides the connection to the measurement amplifier for the measuring equipment.

Multi-bending beam

Xforce load cell beam
  • Xforce P, Fnom 0.2 to 250 kN
  • Xforce HP, Fnom 0.2 to 250 kN
  • Xforce HP+, Fnom 0.5 to 10 kN

With this type the spring element consists of several bending beams arranged in a star formation around a hub and equipped with strain gages. When axial forces are transmitted to the load cell the beams bend, extending or compressing the strain gages.

Even at low forces, this design enables high outer-fiber strain to be generated and values measured accurately, making this principle ideal for measuring low to medium forces.

Due to the symmetrical arrangement of the bending beams the influence of transverse forces and bending moments is largely compensated for.

Bending ring

Xforce load cell ring
  • Xforce K, Fnom 10 to 250 kN
  • Xforce K+, Fnom 10 to 250 kN

In this version the spring element is a bending ring with a spiral strain-gage applied to its entire surface top and bottom.

The bending ring is connected to the hub and outer ring via circumferential elastic joints. When forces are transmitted to the load cell the bending ring deforms and its upper circumference increases whilst the lower circumference decreases, or vice versa. This deformation is recorded by spiral strain gages developed specifically for this load cell.

As the strain gages act uniformly over the entire surface of the bending ring, the load cell has no preferred direction.

Double bending beam

Xforce load cell alignment
  • Xforce P, Fnom 0.005 to 0.1 kN
  • Xforce HP, Fnom 0.005 to 0.1 kN

The deformation element consists of parallel flexible springs on different measuring planes. The large separation of the measuring planes produces a high degree of flexural stiffness in the event of superimposed transverse forces, bending moments or torques.

The principle is ideal for measuring very low to low forces, while integrated overload protection in the HP version prevents damage to the measuring cell.

Technical overview

  • P - Precision
  • HP - High Precision
  • K - Load Cell

Xforce P, Fmax 5 N - 100 N

Xforce P (5 - 100 N)

Nominal force Fnom

0.005

0.01

0.02

0.05

0.1

kN

Nominal force Fnom [lbf]

1.12

2.25

4.5

11.24

22.48

lbf

Item No.

057091

060253

060256

060257

060258

Item No. for ProLine

063919[1]

063920[2]

063921[1]

063922[2]

063923[1]

Measurement range/measurement displacement

Accuracy Class 1 (from 0.4 % of Fnom)

0.02[3]

0.04[4]

0.08

0.2

0.4

N

Accuracy Class 0.5 (from 2 % of Fnom)

0.1

0.2

0.4

1.0

2.0

N

Height for installation, approx.

Height for installation, approx.

55

55

mm

Connection

Connection thread

M28x1.5

M28x1.5

M28x1.5

M28x1.5

M28x1.5

Mounting stud, Ø

8

8

8

8

8

mm

Influences/limit values

Limit bending moment

0.7[5]

1.0[6]

1.3[7]

2.0[6]

3.0[5]

Nm

Limit torque

10.0[8]

10.0[8]

Nm

Limit torque

  1. Only in combination with a ProLine load frame. Observe the relevant notes.
  1. Only in conjunction with a ProLine load frame Please see note.
  1. To calibrate and be able to use the expanded measurement range for Xforce 5 N and 10 N, the corresponding environmental and operating requirements must exist. This is basically an installation site without jolts and vibrations. More specific details can be found in the user manual and the installation instructions.
  1. To enable calibration and use of the extended measurement range for 5 N and 10 N Xforce the appropriate environmental and operating conditions must be present; this basically involves an installation site which is free from vibrations. More detailed information can be found in the Operating Manual and under Environmental Conditions.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction. In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. Unloaded In the case of simultaneous loading at nominal load, these values must be halved.

Xforce P, Fmax 200 N - 1 kN

Xforce P (0.2 - 1 kN)

Nominal force Fnom

0.2

0.5

0.5

1

kN

Nominal force Fnom [lbf]

45

112

112

225

lbf

Item No.

011563

011562

057993

011560

Item No. for ProLine

018542[1]

018540[2]

058423[3]

018539[3]

Measurement range/travel

Accuracy Class 1 (from 0.4 % of Fnom)

0.8

2.0

2.0

4.0

N

Accuracy Class 0.5 (from 2 % of Fnom)

4.0

10.0

10.0

20.0

N

Dimensions/weight

Height for installation, approx.

55

55

61

61

mm

Connection

Connection thread

M28x1.5

M28x1.5

M28x1.5

M28x1.5

Mounting stud, Ø

8

20

20[4]

mm

Mounting stud, Ø

Influences/limit forces

Limit bending moment

2 (3)[5] [6]

5 (7)[7] [8]

5 (7)[7] [8]

15 (17)[7] [8]

Nm

Limit torque

5 (14)[9] [6]

7 (35)[10] [8]

7 (35)[10] [8]

17 (50)[10] [8]

Nm

  1. Only in combination with a ProLine load frame. Please see note.
  1. Only in conjunction with a ProLine load frame Please observe the relevant note.
  1. Only in conjunction with a ProLine load frame Please see note.
  1. With Xforce load cells the diameter of the mounting stud for a 1kN load cell has been changed from 8 mm to 20 mm.
  1. Maximum bending moments Mb, load cell unloaded in direction of measurement. The values must be halved in the event of simultaneous loading at nominal load.
  1. The values refer to the limit torques of the connection system. If these are exceeded, re-calibration will be necessary. The values relating to the limit torques of the measuring cell are shown in brackets.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. The values refer to the limit torques of the connection system. If these values are exceeded, recalibration is required. The values relating to the limit torques of the measuring cell are shown in brackets.
  1. Unloaded. The values must be halved in the event of simultaneous loading at nominal load.
  1. Unloaded. In the case of simultaneous loading at nominal load, these values must be halved.

Xforce P, Fmax 2.5 kN - 10 kN

Xforce P (2.5 - 10 kN)

Nominal force Fnom

2.5

5

10

10

kN

Nominal force Fnom [lbf]

562

1124

2248

2248

lbf

Item No.

011558

011556

017955

011554

Item No. for ProLine

018538[1]

018537[1]

-

018536[2]

Measurement range/measurement travel

Accuracy Class 1 (from 0.4 % of Fnom)

10.0

20.0

40.0

40.0

N

Accuracy Class 0.5 (from 2 % of Fnom)

50.0

100.0

200.0

200.0

N

Dimensions/weight

Height for installation, approx.

61

61

54

70

mm

Connection

Connection thread

M28x1.5

M28x1.5

-

M28x1.5

Mounting stud, Ø

20

20

20

20

mm

Connection flange

-

-

Flange 1[3]

-

Influences/limit values

Limit bending moment

30 (34)[4] [5]

50 (58)[4] [5]

80 (115)[4] [5]

80 (115)[4] [5]

Nm

Limit torque

17 (80)[6] [5]

17 (130)[6] [5]

17 (200)[6] [5]

17 (200)[6] [5]

Nm

  1. Only in conjunction with a ProLine load frame Please observe the relevant note.
  1. Only in conjunction with a ProLine load frame Please see note.
  1. Flange 1 = bolt circle 115 mm, Flange 2 = bolt circle 220 mm.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. The values refer to the limit torques of the connection system. If these values are exceeded, recalibration is required. The values relating to the limit torques of the measuring cell are shown in brackets.
  1. Unloaded. In the case of simultaneous loading at nominal load, these values must be halved.

Xforce P, Fmax 20 kN - 250 kN

Xforce P (20 - 250 kN)

Nominal force Fnom

20

30

50

100

150

250

kN

Nominal force Fnom [lbf]

4496

6744

11240

22481

33721

56202

lbf

Item No.

017907

017909

017910

017911

017912

Item No. for ProLine

019242[1]

019246[2]

019248[1]

019254[1]

-

-

Measurement range/measurement travel

Accuracy Class 1 (from 0.4 % of Fnom)

80.0

120.0

200

400

600

1000

N

Accuracy Class 0.5 (from 2 % of Fnom)

400.0

600.0

1000

2000

3000

5000

N

Connection

Connection flange

Flange 1[3]

Flange 1[3]

Flange 1[3]

Flange 2[3]

Flange 2[3]

Flange 2[3]

Influences/limit values

Limit bending moment

250 (460)[4] [5]

250 (500)[6] [7]

250 (650)[4] [5]

3500 (4500)[4] [5]

4000 (5000)[4] [8]

5000 (6000)[4] [5]

Nm

Limit torque

250 (1500)[9] [5]

250 (3000)[9] [5]

6500 (10000)[9] [5]

5800 (12500)[9] [8]

11000 (15000)[9] [5]

Nm

Limit torque

  1. Only in conjunction with a ProLine load frame Please observe the relevant note.
  1. Only in combination with a ProLine load frame. Observe the relevant notes.
  1. Flange 1 = bolt circle 115 mm, Flange 2 = bolt circle 220 mm.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. The values refer to the limit torques of the connection system. If these values are exceeded, recalibration is required. The values relating to the limit torques of the measuring cell are shown in brackets.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction. In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. The values refer to the limit torques of the connection system. If these values are exceeded, recalibration is required. The values in relation to the limit torques of the measurement cell appear in parenthesis.
  1. The values refer to the limit torques of the connection system. If these are exceeded, re-calibration will be necessary. The values relating to the limit torques of the measuring cell are shown in brackets.
  1. Unloaded. In the case of simultaneous loading at nominal load, these values must be halved.

Xforce HP, Fmax 5 N - 100 N

Xforce HP (5 - 100 N)

Nominal force Fnom

0.005

0.01

0.02

0.05

0.1

kN

Nominal force Fnom [lbf]

1.12

2.25

4.5

11.24

22.48

lbf

Item No.

063924

063925

063926

060259

060260

Item No. for ProLine

063930[1]

063932[2]

063933[3]

Accuracy Class 1 (from 0.2 % of Fnom)

Accuracy Class 1 (from 0.2 % of Fnom)

0.04

0.1

0.2

N

Accuracy Class 0.5 (from 1 % of Fnom)

0.2

0.5

1.0

N

Accuracy Class 0.5 (from 1 % of Fnom)

Connection

Connection thread

M28x1.5

M28x1.5

M28x1.5

M28x1.5

M28x1.5

Mounting stud, Ø

8

8

8

8

8

mm

Influences/limit values

Limit bending moment

6.0[4]

6.0[5]

6.0[6]

6.0[6]

6.0[6]

Nm

Limit torque

10.0[7]

10.0[7]

10.0[8]

10.0[8]

Nm

Limit torque

  1. Only in conjunction with a ProLine load frame. Please see note.
  1. Only in combination with a ProLine load frame Please see note.
  1. Only in conjunction with a ProLine load frame Please see note.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction. In the case of simultaneous loading at nominal load, the values must be halved.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. Unloaded. In the case of simultaneous loading at nominal load, these values must be halved.
  1. Unloaded In the case of simultaneous loading at nominal load, these values must be halved.

Xforce HP, Fmax 200 N - 1 kN

Xforce HP (0.2 - 1 kN)

Nominal force Fnom

0.2

0.5

0.5

1

kN

Nominal force Fnom [lbf]

45

112

112

225

lbf

Item No.

011571

011570

057991

011569

Item No. for ProLine

018548[1]

018547[2]

018546[3]

Measurement range/measurement displacement

Accuracy Class 1 (from 0.2 % of Fnom)

0.4

1.0

1.0

2.0

N

Accuracy Class 0.5 (from 1 % of Fnom)

2.0

5.0

5.0

10.0

N

Dimensions/weight

Height for installation, approx.

55

mm

Connection

Connection thread

M28x1.5

M28x1.5

M28x1.5

M28x1.5

Mounting stud, Ø

8

8

20

20[4]

mm

Influences/limit values

Limit bending moment

2 (3)[5] [6]

5 (7)[7] [8]

5 (7)[7] [8]

15 (17)[7] [8]

Nm

Limit torque

7 (35)[9] [8]

Nm

Limit torque

  1. Only in conjunction with a ProLine load frame. Please see note.
  1. Only in conjunction with a ProLine load frame Please see note.
  1. Only in combination with a ProLine load frame. Observe the relevant notes.
  1. With Xforce load cells the diameter of the mounting stud for a 1kN load cell has been changed from 8 mm to 20 mm.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. The values refer to the limit torques of the connection system. If these are exceeded, re-calibration will be necessary. The values relating to the limit torques of the measuring cell are shown in brackets.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction. In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. The values refer to the limit torques of the connection system. If these values are exceeded, recalibration is required. The values in relation to the limit torques of the measurement cell appear in parenthesis.
  1. Unloaded. In the case of simultaneous loading with a nominal load, these values should be divided in half.

Xforce HP, Fmax 2.5 kN - 10 kN

Xforce HP (2.5 - 10 kN)

Nominal force Fnom

2.5

5

10

10

kN

Nominal force Fnom [lbf]

562

1124

2248

2248

lbf

Item No.

011568

011566

017953

011565

Item No. for ProLine

018544[1]

018554[2]

018543[3]

Measurement range/measurement displacement

Accuracy Class 1 (from 0.2 % of Fnom)

5.0

10.0

20.0

20.0

N

Accuracy Class 0.5 (from 1 % of Fnom)

25.0

50.0

100.0

100.0

N

Connection

Connection thread

M28x1.5

M28x1.5

-

M28x1.5

Mounting stud, Ø

20

20

20

20

mm

Connection flange

Flange 1[4]

Connection flange

Influences/limit values

Limit bending moment

30 (34)[5] [6]

50 (58)[7] [8]

80 (115)[5] [9]

80 (115)[5] [6]

Nm

Limit torque

17 (200)[10] [9]

Nm

Limit torque

  1. Only in conjunction with a ProLine load frame Please observe the relevant note.
  1. Only in conjunction with a ProLine load frame. Please see note.
  1. Only in combination with a ProLine load frame. Observe the relevant notes.
  1. Flange 1 = bolt circle 115 mm, Flange 2 = bolt circle 220 mm.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction. In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. The values refer to the limit torques of the connection system. If these values are exceeded, recalibration is required. The values in relation to the limit torques of the measurement cell appear in parenthesis.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. The values refer to the limit torques of the connection system. If these values are exceeded, recalibration is required. The values relating to the limit torques of the measurement cell are shown in brackets.
  1. The values refer to the limit torques of the connection system. If these are exceeded, re-calibration will be necessary. The values relating to the limit torques of the measuring cell are shown in brackets.
  1. Unloaded. In the case of simultaneous loading at nominal load, these values must be halved.

Xforce K, Fmax 10 kN - 50 kN

Xforce K (10 - 50 kN)

Nominal force Fnom

10

10

20

30

50

kN

Nominal force Fnom [lbf]

2248

2248

4496

6744

11240

lbf

Item No.

1008815

1008732

318936

325642

318934

Item No. for ProLine

1008733

325644[1]

325223[2]

Accuracy Class 1 (from 0.2 % of Fnom)

Accuracy Class 1 (from 0.2 % of Fnom)

20

40

60

100

N

Accuracy Class 0.5 (from 1 % of Fnom)

100

200

300

500

N

Measurement range/measurement displacement

Accuracy Class 0.5 (from 1 % of Fnom)

100

N

Installation height approx.

Connection

Connection thread

-

M28x1.5

-

-

-

Mounting stud, Ø

20

20

36

36

36

mm

Connection flange

Flange 1[3]

-

Flange 1[4]

Flange 1[3]

Flange 1[5]

Influences/limit values

Limit bending moment

500[6]

500[7]

600[7]

700[7]

11100[7]

Nm

Limit torque

500[8]

500[8]

500[9]

500[9]

1800[10]

Nm

  1. Only in combination with a ProLine load frame. Observe the relevant notes.
  1. Only in conjunction with a ProLine load frame Please see note.
  1. Flange 1 = pitch circle 115 mm, flange 2 = pitch circle 220 mm
  1. Flange 1 = bolt circle 115 mm, Flange 2 = bolt circle 220 mm
  1. Flange 1 = bolt circle 115 mm, Flange 2 = bolt circle 220 mm.
  1. Maximum bending moments Mb for a load cell without a load in the measurement direction. In the case of simultaneous loading with a nominal load, the values should be divided in half.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. Unloaded. In the case of simultaneous loading with a nominal load, these values should be divided in half.
  1. Unloaded. In the case of simultaneous loading at nominal load, these values must be halved.
  1. Unloaded In the case of simultaneous loading at nominal load, these values must be halved.

Xforce K, 100 kN - 250 kN

Xforce K (100 - 250 kN)

Nominal force Fnom

100

150

250

kN

Nominal force Fnom [lbf]

22481

33721

56202

lbf

Item No.

318932

320304

318930

Item No. with centering spigot

-

068918[1]

Item No. for ProLine

325328[2]

-

-

Measurement range/measurement travel

Accuracy Class 1 (from 0.2 % of Fnom)

200

300

500

N

Accuracy Class 0.5 (from 1 % of Fnom)

1000

1500

2500

N

Dimensions/weight

Height for installation, approx.

105

162

mm

Connection

Mounting stud, Ø

60

60

60

mm

Connection flange

Flange 2[3]

Flange 2[3]

Flange 2[3]

Influences/limit values

Limit bending moment

4800[4]

8000[4]

30000[4]

Nm

Limit torque

10000[5]

[6]20000

55000[6]

Nm

  1. Flange interface with centering-spigot instead of mounting stud (bolt circle 115/220 mm, centering spigto D30/70 mm).
  1. Only in conjunction with a ProLine load frame Please see note.
  1. Flange 1 = bolt circle 115 mm, Flange 2 = bolt circle 220 mm.
  1. Maximum bending moments Mb for a load cell which is unloaded in the direction of measurement. In the case of simultaneous loading at nominal load, the values must be halved.
  1. Unloaded In the case of simultaneous loading at nominal load, these values must be halved.
  1. Unloaded. In the case of simultaneous loading at nominal load, these values must be halved.
Xforce load cell load measuring system

Xforce Force-measuring System with Load Bypass Unit

During tests in the compression direction, Xforce HP load cells are safeguarded by mechanical overload protection and an integrated load bypass unit.

  • tests at higher test speeds, as here there is a danger that set force-limits will not take effect quickly enough
  • tests with very small separation between fixtures or with little travel; therefore also ideal for tests on springs and components.

Advantages and features

  • large support width gives the force measurement system high axial and flexural stiffness
  • overload protection provided by mechanical stop
  • clear, error-free compression-platen positioning (no alignment unit required)
  • large overtravel (longer than testing machine braking distance) ensures safety
  • low overall height achieved through compact design
  • patent-based Xforce load cells available exclusively from Zwick Roell
  • all Xforce load cells are highly insensitive to parasitic influences (transverse forces, bending moments, and torque)
  • Xforce load cells satisfy calibration requirements well beyond specifications in standards

Function description

  • During tests in the compression direction, Xforce HP load cells are safeguarded by mechanical overload protection and an integrated load bypass unit.
  • In the case of the mechanical overload protection a mechanical stop locks at or above the load-cell nominal force, preventing damage to the load cell due to overload.
  • The integrated load bypass unit protects the entire test arrangement.
    From a defined load threshold (starting from the maximum capacity of the load cell) the existing load is transferred to several springs, allowing overtravel of the entire test assembly and thereby preventing an increase in force in the load cell which would result in overload or even destruction.

Technical data (AllroundLine & ProLine)

Xforce force-measurement system with load bypass unit for AllroundLine/ProLine

Nominal force, max. (Fnom) [kN]

2.5

5

10

kN

Nominal force, max. (Fnom) [lbf]

562

1124

2248

lbf

Item No.

029720

029724

027258

diameter

234[1]

234[1]

234[1]

mm

Accuracy Class 1 (from 0.25 % of Fnom)

5

10

20

N

Accuracy Class 0.5 (from 1 % of Fnom)

25

50

100

N

Overall height

106[2]

106[2]

106[2]

mm

Approx. weight

16

16

16

kg

Load bypass unit from

2.5[3]

5[3]

10[3]

kN

Overtravel

4

4

4

mm

  1. 172mm diameter suitable for single-column testing machines; 234mm diameter suitable for two-column testing machines
  1. With compression platen inserted. Installation height reduced by approx. 12 mm without compression platen.
  1. Force measurement systems combining load bypass units and load cells with low nominal forces on application.

Technical data (zwickiLine)

Xforce force-measurement system with load bypass unit for zwickiLine

Nominal force, max. (Fnom) [kN]

0.5

1

2.5

kN

Nominal force, max. (Fnom) [lbf]

112

225

562

lbf

Item No.

083222[1]

083223[1]

092455[1]

Diameter

172[2]

172[2]

mm

Accuracy Class 1 (from 0.25 % of Fnom)

1

2

5

N

Accuracy Class 0.5 (from 1 % of Fnom)

5

10

25

N

Overall height

96[3]

96[3]

93[3]

mm

Approx. weight

7

7

7

kg

Load bypass unit from

0.5[4]

1[4]

2.5[4]

kN

Overtravel

4

4

4

mm

  1. Also possible in conjunction with zwicki standard safety device
  1. 172mm diameter suitable for single-column testing machines; 234mm diameter suitable for two-column testing machines
  1. With compression platen inserted. Installation height reduced by approx. 12 mm without compression platen.
  1. Force measurement systems combining load bypass units and load cells with low nominal forces on application.
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