Two DLY size 30 rolling linear guideway samples met the referenced requirements in commissioned testing covering material hardness, machining accuracy, operating noise and preload drag variation.
DLY Linear Guideway Samples Complete Third-Party Testing
Two rolling linear guideway samples manufactured by Zhejiang DLY Automation Manufacturing Co., Ltd. were submitted to Zhejiang Fangyuan Testing Group Co., Ltd. for commissioned testing.
The submitted samples were size 30 rolling linear guideway assemblies. Testing was conducted from October 22 to November 4, 2022, at the Xiasha Qige laboratory and the DLY site.
Seven indicators were evaluated with reference to the T/ZZB document titled "Rolling Linear Guide Pair (Draft for Approval)." According to the issued test conclusion, all evaluated items met the referenced requirements.
Scope note: These figures are the recorded results for the two submitted size 30 samples. They should not be interpreted as guaranteed values for every DLY linear guideway model or production batch.
Recorded Test Results
| Test Item | Recorded Result | Referenced Requirement |
|---|---|---|
| Block surface hardness | 755.2 HV1 | 700–800 HV |
| Rail surface hardness | 766.3 HV1 | 700–800 HV |
| Block hardened-layer depth at 700 HV | 0.85 mm | Above the stated minimum |
| Rail hardened-layer depth at 700 HV | 1.53 mm | Above the stated minimum |
| Raceway surface roughness | Ra 0.14 μm | ≤ Ra 0.4 μm |
| Parallelism deviation | 3 μm | ≤ 20 μm |
| Operating noise | 47.2 dB(A) | ≤ 70 dB(A) |
| Preload drag-force variation | 6% | ≤ 25% for the stated preload condition |
Surface Hardness and Hardened-Layer Depth
The recorded surface hardness was 755.2 HV1 for the block and 766.3 HV1 for the guide rail. Both values were within the referenced range of 700–800 HV.
At a hardness level of 700 HV, the measured hardened-layer depth was 0.85 mm for the block and 1.53 mm for the rail. Both measurements were reported as exceeding the applicable minimum depth requirements.
Raceway Finish and Parallelism
The measured surface roughness of the working raceway was Ra 0.14 μm, compared with the referenced maximum of Ra 0.4 μm.
Parallelism deviation was recorded at 3 μm, below the referenced limit of 20 μm. Raceway finish and parallelism are important to smooth movement, load distribution and positioning consistency in a linear guideway assembly.
Operating Noise and Drag-Force Variation
Operating noise was measured at 47.2 dB(A), below the referenced limit of 70 dB(A).
The variation in preload drag force was recorded at 6%, compared with the referenced limit of 25% for the stated preload condition. Stable drag force can help support consistent motion when the rail and block are correctly installed and lubricated.
Laboratory and On-Site Testing
The commissioned testing was conducted at both the Zhejiang Fangyuan laboratory and the DLY site. The report records that certain items were completed using testing facilities located at the company.
This arrangement allowed relevant characteristics to be evaluated using both third-party laboratory resources and on-site equipment while the testing organization remained responsible for the issued conclusion. issued conclusion.
Testing Report Records
The following images form part of the records associated with the commissioned testing. The test report should be consulted together with the relevant model, sample and test-condition information.
Testing record related to the submitted size 30 linear guideway samples.
Recorded information from the commissioned linear guideway testing.
Test data associated with the evaluated linear guideway samples.
Supporting record from the commissioned testing process.
Additional record associated with the size 30 sample evaluation.
Supporting Quality Evaluation with Measured Data
The test results provide measured information for the evaluated DLY size 30 linear guideway samples. They also offer a reference for continued process control and product evaluation in applications such as machine tools and automation equipment.
For an actual project, product selection should still be based on the required size, load, rigidity, accuracy, block configuration, mounting arrangement and operating environment.
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