Source: GEM / Chuancheng bearing catalogue, PDF pages 1–2 (printed pages 3–6), plus the wheel-bearing seal diagrams.
These are statements and comparison tables from that catalogue. They are not ZCY certification or a material commitment for every listed item. Confirm the required grade, tolerance class and supporting documents for the exact product before quotation.
Materials and hardness stated in the catalogue
The source states that its rings and rolling elements use GCr15 high-carbon bearing steel, and describes AISI 52100, DIN 100Cr6 and JIS SUJ2 as equivalent grades.
The source states HRC60–HRC65 for rings and rolling elements.
Chemical composition, percent
| Element | Catalogue value (%) |
|---|---|
| C | 0.95–1.05 |
| Si | 0.15–0.35 |
| Mn | 0.25–0.45 |
| P | ≤0.027 |
| S | ≤0.02 |
| Cr | 1.40–1.65 |
| Mo | - |
| Cu | ≤0.25 |
| Ni | ≤0.30 |
The Chinese text lists cold-rolled carbon-steel sheet, machined brass, nylon and phenolic-resin cages, depending on product and special requirements.
The source English cage statement additionally mentions stainless steel; its Chinese text does not. Both versions are retained, without resolving the difference.
View the original materials excerpt
Tolerance references in the catalogue
The source states that GEM/Chuancheng bearing tolerances follow GB/T307 and describes it as equivalent to ISO492. This has not been independently verified.
Tolerance classes
| Country | Standard | Source column 1 | Source column 2 | Source column 3 | Source column 4 | Source column 5 |
|---|---|---|---|---|---|---|
| China | GB/T307 | 0 (G) | 6 (E) | 5 (D) | 4 (C) | 4 (C) |
| ISO | ISO492 | 0 | 6 | 5 | 4 | 4 |
| Sweden | SKF | 0 | P6 | P5 | P4 | P4 |
| Germany | DIN 620/2 | P0 | P6 | P5 | P4 | P4 |
| US | ANSI B3.14 | ABEC1 | ABEC3 | ABEC5 | ABEC7 | ABEC7 |
| Japan | JIS B1514 | 0 | 6 | 5 | 4 | 4 |
Repeated final columns are printed that way in the source. This is a catalogue comparison table, not independent validation of equivalence.
Tapered roller bearing tolerance comparison, metric sizes
| Country | Standard | Source column 1 | Source column 2 | Source column 3 | Source column 4 | Source column 5 | Source column 6 |
|---|---|---|---|---|---|---|---|
| China | GB/T307 | 0 | P6X | — | P5 | P4 | — |
| ISO | ISO492 | 0 | 6X | — | 5 | 4 | — |
| Sweden | SKF | 0 | CLN | — | P5 | — | — |
| US | ANSI | K | — | N | C | B | A |
| Japan | JIS | 0 | 6X | 6 | 5 | 4 | — |
Column order follows the catalogue; blank cells are shown as dashes.
Tapered roller bearing tolerance comparison, inch sizes
| Country | Standard | Source column 1 | Source column 2 | Source column 3 | Source column 4 | Source column 5 |
|---|---|---|---|---|---|---|
| China | GEM | 4 | — | 3 | — | — |
| ISO | ISO492 | 4 | — | 3 | 0 | 00 |
| Sweden | SKF | 0 | — | CL3 | CL0 | — |
| US | ANSI | 4 | 2 | 3 | 0 | 00 |
Column order follows the catalogue; blank cells are shown as dashes.
View the original tolerance excerpt
Bearing-family version labels
OPEN, Z, ZZ, RS, 2RS, NR, ZNR
These are family-level variants in the source heading, not a claim that every listed model is available in every version.
Wheel-bearing seal codes
A, B, C, D, E, S
Seal type letters refer to the source diagrams. The letters are preserved as printed; no external seal standard or interchangeability has been inferred.
Steering-bearing section: vehicle references
The vehicle list and bearing dimension table are separate blocks. The source does not state a one-to-one fitment mapping; no mapping has been inferred. Some vehicle designations need visual confirmation.
- XLR125-NXR125 BROS
- AX100-115/AKT100
- LIBERO110/CRYPTON110-115-XT/T110/T115L SE/DTK
- RX100/115/DT125-175K-DTE/BWS/YBR125/BWS125
- XL125S/CD100/AKT125SL/CBZ160
- BOXER CT100/KTEC/PULSAR180/DISCOVER125/135
- Dm150
- GXT200
- HONDA ECO DELUXE/CBF125-150
- XCD125/PULSAR135/G7S/BC175/BARAKO/HD3
- BIZ100/125/PCX150/POP100/WEB100
- DT180/200/CRYP/NE0125
- Brazil off-road
- XRM
- WIND125
- SHOGUN/SMASH
- YBR/FZ16/RS150/RS100/M10
- AKT110 HONDA C100BIZ/C100/WAVE125/AK110S
- FURY
- GY6-150/Gongzhu Zhonghua [catalogue wording]
- CG125/TMX/WY125/ECO100+SLEEK/SPLENDOR100
- GN-125/GS125
- CD70/CG125
- 768906
Production sequence described by the source
- Forging
- Annealing
- Turning
- Heat treatment
- Grinding
- Measuring
- Assembly
- Performance testing
- Cleaning, demagnetizing and oiling
- Packaging