Four Square Test System
Model 1800

System Features |
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System Features |
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The Model 1800 Four Square Test System is designed to test durability of drive shafts, half- shafts and universal joints under typical and extreme operating conditions. The Model 1800 provides great flexibility and can be configured to accommodate your test needs.
The machine is capable of testing four drive shafts and eight U-Joints simultaneously in a hard-geared loop. Once this loop is connected, the rotary torque generator can be actuated to rotate one end in respect to the other end, therefore creating binding torque without using a braking device. The Four Square machine can also accommodate two drive shafts and four U-Joints by removing the jounce section. This allows testing of extra long shafts up to 100” in length.
This configuration allows constant and uniform torque throughout all four shafts at a selected speed even if the specimen’s physical dimensions change. This design facilitates the replication of actual operating conditions.
The Model 1800 Four Square Test System is designed to test durability of drive shafts, half- shafts and universal joints under typical and extreme operating conditions. The Model 1800 provides great flexibility and can be configured to accommodate your test needs.
The machine is capable of testing four drive shafts and eight U-Joints simultaneously in a hard-geared loop. Once this loop is connected, the rotary torque generator can be actuated to rotate one end in respect to the other end, therefore creating binding torque without using a braking device. The Four Square machine can also accommodate two drive shafts and four U-Joints by removing the jounce section. This allows testing of extra long shafts up to 100” in length.
This configuration allows constant and uniform torque throughout all four shafts at a selected speed even if the specimen’s physical dimensions change. This design facilitates the replication of actual operating conditions.
A key component of this system is the Microsoft® Windows® based ProLink software package that integrates machine controls, data acquisition, data analysis, and reporting. ProLink provides a user- friendly environment for monitoring test results and programming custom simulation. Characteristics such as speed, torque, temperature, jounce angle and frequency may be viewed in real time. Raw data is stored for further analysis and report generation. Using ProLink’s networking capabilities data may be accessed, analyzed and reports generated from anywhere on the network.
Optional environmental chambers are available for temperature control with water spray and dust spray systems. Variable speed cooling air system is also available to simulate real life wind cooling effects.

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Typical Specifications
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| Number of shafts per test | 2 or 4 |
| Shaft length range | 15” - 100” (400-2500mm) |
| Maximum Shaft Diameter | 6.3” (160mm) |
| Number of U joints per test | 4 or 8 |
| Maximum Static Torque | 177,000 in-lbs @ 0 RPM (20000 Nm) |
| Maximum Dynamic Torque | 177,000 in-lbs @ 500 RPM (20000Nm) |
| Power | 300 HP - AC Variable Speed |
| Speed | 0-6000 RPM |
| Maximum Drive Shaft Angle or Movement | 13.8” (350mm) |
| Jounce Frequency | 0.5 Hz |
| Controls | ProLink Software |
| Maximum Tensile Load | 33,720 lbs (150 kN) @ Max Torque |
| Environmental Chamber (Optional) |
Water & Dust Spray System Temp. 5C – 40C Relative Humidity 20% - 80% |
| Maximum Cooling Air Flow | 30 m/s |
| Air Flow Rate | 0-50 m/s |
Options |
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