Railway freight car rolling bearing code

Core Tip: Source: China Railway Network 1, GB/T273-1988 standard notation. The bearing code consists of Chinese pinyin letters and numbers. Front paragraph: numbers and letters, digital representation
Source: China Railway Network

1. GB/T273-1988 standard notation.

The bearing code consists of Chinese pinyin letters and numbers.

The first paragraph: the number and letter composition, the number indicates the clearance series (the basic number is 0 auxiliary number is 1~9), and the letters (B, C, D, E, (F), G) indicate the accuracy level.

Middle section: Seven digits indicate the basic model of the bearing. Seven - width series, six five - structural characteristics, four - bearing model, three - diameter series, two one - inner diameter series.

The following paragraph: (Supplementary code) uses letters and numbers to indicate bearing structure changes and special technical requirements.

SKF - SKF manufacturer code

19——Structural features are sealed double row tapered roller

7——The bearing type is tapered bearing

7——The diameter series is a non-standard series

26——Inner diameter is 26*5=130mm

K1, K2 - change in inner diameter (reduced by 0.5, 1.0)

2. GB/T272-1993 standard notation:

Pre-code: A supplementary code before the basic code. The letters indicate the structural shape of the bearing and so on.

Basic code: is the basis of the bearing code. Indicates the basic type structure and dimensions of the bearing.

Post code: Use the letter (or plus number) to indicate the bearing code, tolerance, material, technical code, and then add the supplementary code after the basic code.

35——Structural features are sealed double row tapered roller bearings

2——Width series code 2

2——diameter series code 2

26——Inner diameter is 26*5=130mm

X2 - width is non-standard series

2RZ - skeletal rubber seal on both ends of the bearing (non-contact)

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