Gear Accuracy Standards Explained: DIN / ISO / AGMA / GB
Detailed explanation of the four major gear accuracy standard systems, with an accuracy grade comparison table to help customers select the appropriat
Four Major Standards Systems#
| DIN (Germany) | ISO (International) | AGMA (USA) | GB (China) | Machining Method | Application Scenarios |
|---|---|---|---|---|---|
| DIN 3 | ISO 3 | AGMA 14~15 | GB Grade 3 | Gear grinding | Aerospace gears, precision instruments |
| DIN 4 | ISO 4 | AGMA 12~13 | GB Grade 4 | Gear grinding | High-speed transmissions, precision machine tools |
| DIN 5 | ISO 5 | AGMA 10~11 | GB Grade 5 | Gear grinding/gear shaving | Automotive transmissions, precision machinery |
| DIN 6 | ISO 6 | AGMA 8~9 | GB Grade 6 | Gear shaving/gear grinding | General machinery, industrial equipment |
| DIN 7 | ISO 7 | AGMA 7~8 | GB Grade 7 | Gear hobbing/gear shaping | Ordinary machinery, conveying equipment |
Geyang Transmission ’s batch machining accuracy is consistently at GB Grade 4~5, and gear grinding can achieve up to DIN Grade 3.