GB/T 1804-2000 | ||||||||
表1 线性尺寸的极限偏差数值 mm | ||||||||
公差等级 | 基本尺寸分段 | |||||||
0.5~3 | >3~6 | >6~30 | >30~120 | >120~400 | >400~1 000 | >1 000~2 000 | >2000~4000 | |
精密f | ±0.05 | ±0.05 | ±0.1 | ±0.15 | ±0.2 | ±0.3 | ±0.5 | - |
中等m | ±0.1 | ±0.1 | ±0.2 | ±0.3 | ±0.5 | ±0.8 | ±1.2 | ±2 |
粗糙c | ±0.2 | ±0.3 | ±0.5 | ±0.8 | ±1.2 | ±2 | ±3 | ±4 |
最粗v | - | ±0.5 | ±1 | ±1.5 | ±2.5 | ±4 | ±6 | ±8 |
表2 倒圆半径和倒角高度尺寸的极限偏差数值 mm | ||||||||
公差等级 | 基本尺寸分段 | |||||||
0.5~3 | >3~6 | >6~30 | >30 | |||||
精密f | ±0.2 | ±0.5 | ±1 | ±2 | ||||
中等m | ||||||||
粗糙c | ±0.4 | ±1 | ±2 | ±4 | ||||
最粗v | ||||||||
注:倒圆半径和倒角高度的含义参见GB/T 6403.4 | ||||||||
表3 角度尺寸的极限偏差数值 | ||||||||
公差等级 | 长度分段 | |||||||
~10 | >10~50 | >50~120 | >120~400 | >400 | ||||
精密f | ±1° | ±30′ | ±20′ | ±10′ | ±5′ | |||
中等m | ||||||||
粗糙c | ±1°30′ | ±1° | ±30′ | ±15′ | ±10′ | |||
最粗v | ±3° | ±2° | ±1° | ±30′ | ±20′ |