Self-Locking Nut Torsion Testing Machine
The Self-Locking Nut Torsion Testing Machine is designed for testing the locking performance and torsional characteristics of self-locking nuts. The machine can be used to evaluate the locking performance of high-strength self-locking nuts, nylon self-locking nuts, prevailing torque nuts, and other types of self-locking nuts.
The loading speed is automatically controlled by a computer. An AC servo motor and drive system provide stable, uniform, and shock-free loading. With appropriate fixtures, the machine can perform torsional testing within the rated torque capacity.
Application
The Self-Locking Nut Torsion Testing Machine is suitable for:
(1) High-strength self-locking nuts
(2) Nylon self-locking nuts
(3) Prevailing torque nuts
(4) Various self-locking nuts
(5) Threaded fastening components requiring locking performance evaluation
Typical applications include:
(1) Self-locking performance testing
(2) Locking torque testing
(3) Torsion torque measurement
(4) Torque-angle analysis
(5) Quality inspection of self-locking nuts
(6) Production quality control
(7) Research and development of fastening components
The equipment is suitable for manufacturers, industrial enterprises, aerospace-related applications, research institutions, and departments involved in the production or inspection of self-locking nuts.
Standards
The supplied product information specifies the following standards:
(1) GB 943-88 — Technical Conditions for Self-Locking Nuts
(2) HB 5643-87 — Test Requirements and Methods for Self-Locking Nuts
Parameters
| Parameter | Specification |
|---|---|
| Maximum Test Torque | 10 Nm / 20 Nm / 50 Nm / 100 Nm / 200 Nm / 500 Nm |
| Test Stroke | 300 mm |
| Testing Machine Class | Class 0.5 / Class 1 |
| Torque Measurement Range | 1%–100% FS |
| Minimum Torque Reading | 0.01 Nm / 0.1 Nm |
| Angle Resolution | 0.01° |
| Maximum Torsion Angle | 99999° |
| Test Speed | 0.1–720°/min, customizable |
| Relative Angle Indication Error | < ±0.5% |
| Angle Indication Repeatability Error | < 0.5% |
| Relative Test Force Indication Error | < ±0.5% |
| Test Force Indication Repeatability Error | < 0.5% |
| Test Speed Accuracy | Better than ±1% of indication |
| Loading Direction | Bidirectional |
| Torsion Fixture | Three-jaw chuck |
| Power Supply | 220 V, 50 Hz |
| Applicable Specimens | Various sizes of self-locking nuts |
Features
(1) Designed for Self-Locking Nuts – Developed specifically for evaluating the locking and torsional performance of self-locking nuts.
(2) Computer-Controlled Loading – Test parameters and loading processes can be controlled automatically through the computer system.
(3) Servo Motor Loading – The AC servo motor and drive system provide stable and uniform loading.
(4) Shock-Free Loading – The loading system is designed to reduce impact during the test process.
(5) Wide Torque Selection – Available configurations range from 10 Nm to 500 Nm.
(6) Bidirectional Loading – Supports torsional loading in both rotational directions.
(7) High-Resolution Angle Measurement – The listed angle resolution is 0.01°.
(8) Customizable Test Speed – The standard speed range is 0.1–720°/min and can be customized according to the test requirements.
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