: The items can be replaced or refunded beause of quality problem within one year from the date the buyer get the goods .
In the whole course from purchasing of raw materials to every process of production, "LB"Brand besrings are all strictly and carefully inspected to guarantee quality.Besides the basic and normally used testing instruments,the company also adopts the following testing and inspecting instruments to control the production processes and finished products.
No. Model No.of instrument
Name of instrument Test item
(1): HV-4B Pc high-speed automatic carbon and sulfur analyser Chemical composition of raw material
(2): HC-II High-speed digital display automatic analyzer
(3): 4X1 Metallurgical microscope Analysis of material and metallurgical structure
(4): Y9025 Roundness measuring equipment Roundness of groove and outer diameter
(5): R902 Groove curvature inspecting instrument Groove curvature and groove shape
(6): SRM-1 Surface roughness inspecting instrument Roughness of groove and surface
(7): S0910 Bearing vibration inspecting instrument (Accelerationg)vibration and abnormal sound
(8): BVT-1 Bearing vibration inspecting instrument (speed) vibration and abnormal sound
Deep groove ball bearings types:
1, single row deep groove ball bearings
2, single row deep groove ball bearings with dust cover
3, with a dust cover, a ring of single row deep groove ball bearings
4, the outer ring on the stopper groove and snap ring of single row deep groove ball bearings
5, deep groove ball bearings ball gap
6, double row deep groove ball bearings
In accordance with the sizes of deep groove ball bearings can be divided into:
(1) miniature bearings ---- nominal diameter size range of 26mm bearings;
(2) small bearing ---- nominal diameter size range of 28-55mm bearings;
(3) small and medium-sized bearings ---- nominal diameter size range of 60-115mm bearings;
(4) large bearing ---- nominal diameter size range of 120-190mm bearings
(5) large bearing ---- nominal diameter size range of 200-430mm bearings;
(6) ---- large bearing diameter size range of 440mm or more bearings.
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