How to distinguish the quality of 45mm three-section steel ball slide rails

1. Sight method, feel method.

A. Handheld slide, placed at a 45-degree angle with the horizontal plane, pull the slide, and then let go, if the middle rail, the inner rail, slowly automatically slide off, without a big manic sound, the surface of this slide slide is good. Repeat several times. Using the above methods, the quality of the 45mm three-section steel ball slide rail can be accurately and objectively judged. Whether it is a domestic slide or an imported slide.

B. Use the visual method to check whether there are large scars on the surface of the slide rail, whether there is rust, and whether it is smooth. Punching place, cutting place and plastic accessories cape, whether the burr is large, generally not more than 0.2mm. Also do not reduce the oil, so as not to reduce the service life of the slide rail and increase the manic sound when sliding.

2． Tool Measurement:

A. Use the "fatigue tester" to measure the life of the slide rail under the fixed weight.

Running speed of 10 times / min round trip once, load capacity of 45KG 18 inches length as the benchmark, generally pleasant, if it can reach more than 30,000 times, it is qualified.( Slide rails made of different materials, the number of slides will also be different) For customers who do not have a "slide fatigue testing machine", the quality requirements of the sliding rails in the number of slides can be controlled by controlling the thickness of the slide rails. 

B. Measure the thickness of the slide rail with a micrometer, 45mm three-section slide rail, divided into outer rail, middle rail, inner rail, one by one accurate measurement, the more commonly used thickness dimensions are: 1.2mm/1.2mm/1.4 (1.5) mm and 1.0mm/1.0mm/1.2mm, the difference range is positive 0, minus 0.05mm. If a micrometer is not available, it can also be measured with a vernier caliper. When measuring, pay attention to the fact that because it is mold processing, the fracture will be more or less a little burr, which should be avoided and measured in a flat place to ensure accuracy.

C. Test the corrosion resistance of the slide rail with a "spray tester".

5% sodium chloride solution, room temperature of 35 degrees, reaching more than 48 hours, according to the 9.0 grade judgment is qualified (no obvious rust occurs). If there is no "spray testing machine", it can also be adjusted to a concentration of 5% with table salt, based on submerged slide rails. The indoor temperature is controlled at 35 degrees. The main purpose of the test is to test the corrosion resistance of the slide rail, if it does not reach more than 48 hours, in a humid environment, or under ordinary temperature conditions, it will not take long for the plating layer on the surface of the slide rail to fall off and rust. This will have a very big impact on the overall function of furniture or other items after using slide rails.

D. Requirements of slide rails in environmental protection.

It is required to meet the requirements of the EU ROSH Directive, including steel plates, surface plating, plastic fittings, steel balls, etc. all parts and various requirements for environmental protection in the production process. The unit price of the slide is also more expensive than that of the ordinary slide. This test can only be submitted to professional institutions such as SGS. And let the supplier provide test reports, responsible for the authenticity of the report and the continuity of the product's compliance with the standard.

E. Inspection of plastic fittings on slide rails.

Because the plastic accessories without function, the materials used are not the same, the requirements for the hard bottom are not the same, in principle, it is best to use the plastic accessories produced of pure materials, so as to ensure the quality of the plastic accessories, and then to ensure the quality of the slide rail. When purchasing slide rails, let the supplier provide relevant information documents and standards, and control the quality of plastic accessories by boiling, freezing, hardness measurement, etc.

F. Measurement of bead thickness.

In the sliding rail closed state, the thickness of the cross-section of the part of the steel ball of the sliding rail is measured by the vernier caliper, the general standard is 12.7mm, plus or minus 0.3mm. This indicator is mainly to ensure that the sliding rail is installed on both sides of the drawer, and the reserved space on both sides of the drawer coincides. Otherwise, the drawer is prone to swinging left and right or poor slide rail after installing the slide rail.

G. Test the hardness of the rail steel plate with a "hardness tester".

Generally between 55--70 degrees Roche is in the normal range. This indicator directly affects the service life of the rail and the number of rails. If there is no "hardness tester", it can only be tested by professional institutions, such as SGS. It is also possible to have the supplier provide test reports and be responsible for the authenticity of the reports.