工程塑料模塑塑件尺寸公差（GB/T14486-93） mm
公差
| 等级 | 公差 种类 | 基 本 尺 寸 | ||||||||||||
| 大于0 到3 | 3 6 | 6 10 | 10 14 | 14 18 | 18 24 | 24 30 | 30 40 | 40 50 | 50 65 | 65 80 | 80 100 | 100 120 | ||
| 标注公差的尺寸公差值 | ||||||||||||||
| MT1 | A | 0.07 | 0.08 | 0.09 | 0.10 | 0.11 | 0.12 | 0.14 | 0.16 | 0.18 | 0.20 | 0.23 | 0.26 | 0.29 |
| B | 0.14 | 0.16 | 0.18 | 0.20 | 0.21 | 0.22 | 0.24 | 0.26 | 0.28 | 0.30 | 0.33 | 0.36 | 0.39 | |
| MT2 | A | 0.10 | 0.12 | 0.14 | 0.16 | 0.18 | 0.20 | 0.22 | 0.24 | 0.26 | 0.30 | 0.34 | 0.38 | 0.42 |
| B | 0.20 | 0.22 | 0.24 | 0.26 | 0.28 | 0.30 | 0.32 | 0.34 | 0.36 | 0.40 | 0.44 | 0.48 | 0.52 | |
| MT3 | A | 0.12 | 0.14 | 0.16 | 0.18 | 0.20 | 0.24 | 0.28 | 0.32 | 0.36 | 0.40 | 0.46 | 0.52 | 0.58 |
| B | 0.31 | 0.34 | 0.36 | 0.38 | 0.40 | 0.44 | 0.48 | 0.52 | 0.56 | 0.60 | 0.66 | 0.72 | 0.78 | |
| MT4 | A | 0.16 | 0.18 | 0.20 | 0.24 | 0.28 | 0.32 | 0.36 | 0.42 | 0.48 | 0.56 | 0. | 0.72 | 0.82 |
| B | 0.36 | 0.38 | 0.40 | 0.44 | 0.48 | 0.52 | 0.56 | 0.62 | 0.68 | 0.76 | 0.84 | 0.92 | 1.02 | |
| MT5 | A | 0.20 | 0.24 | 0.28 | 0.32 | 0.38 | 0.44 | 0.50 | 0.56 | 0. | 0.74 | 0.86 | 1.00 | 1.14 |
| B | 0.40 | 0.44 | 0.48 | 0.52 | 0.58 | 0. | 0.70 | 0.76 | 0.84 | 0.94 | 1.06 | 1.20 | 1.34 | |
| MT6 | A | 0.26 | 0.32 | 0.38 | 0.46 | 0.54 | 0.62 | 0.70 | 0.80 | 0.94 | 1.10 | 1.28 | 1.48 | 1.72 |
| B | 0.46 | 0.52 | 0.58 | 0.68 | 0.74 | 0.82 | 0.90 | 1.00 | 1.14 | 1.30 | 1.48 | 1.68 | 1.92 | |
| MT7 | A | 0.38 | 0.48 | 0.58 | 0.68 | 0.78 | 0.88 | 1.00 | 1.14 | 1.32 | 1.54 | 1.80 | 2.10 | 2.40 |
| B | 0.58 | 0.68 | 0.78 | 0.88 | 0.98 | 1.08 | 1.20 | 1.34 | 1.52 | 1.74 | 2.00 | 2.30 | 2.60 | |
| 未注公差的尺寸允许偏差 | ||||||||||||||
| MT5 | A | ±0.10 | ±0.12 | ±0.14 | ±0.16 | ±0.19 | ±0.22 | ±0.25 | ±0.28 | ±0.32 | ±0.37 | ±0.43 | ±0.50 | ±0.57 |
| B | ±0.20 | ±0.22 | ±0.24 | ±0.26 | ±0.29 | ±0.32 | ±0.35 | ±0.38 | ±0.42 | ±0.47 | ±0.53 | ±0.60 | ±0.67 | |
| MT6 | A | ±0.13 | ±0.16 | ±0.19 | ±0.23 | ±0.27 | ±0.31 | ±0.35 | ±0.40 | ±0.47 | ±0.55 | ±0. | ±0.74 | ±0.86 |
| B | ±0.23 | ±0.26 | ±0.29 | ±0.33 | ±0.37 | ±0.41 | ±0.45 | ±0.50 | ±0.57 | ±0.65 | ±0.74 | ±0.84 | ±0.96 | |
| MT7 | A | ±0.19 | ±0.24 | ±0.29 | ±0.34 | ±0.39 | ±0.44 | ±0.50 | ±0.57 | ±0.66 | ±0.77 | ±0.90 | ±1.05 | ±1.20 |
| B | ±0.29 | ±0.34 | ±0.39 | ±0.44 | ±0.49 | ±0.54 | ±0.60 | ±0.67 | ±0.76 | ±0.87 | ±1.00 | ±1.15 | ±1.30 |
公差
| 等级 | 公差 种类 | 基 本 尺 寸 | |||||||||||
| 120 140 | 140 160 | 160 180 | 180 200 | 200 225 | 225 250 | 250 280 | 280 315 | 315 355 | 355 400 | 400 450 | 450 500 | ||
| 标注公差的尺寸公差值 | |||||||||||||
| MT1 | A | 0.32 | 0.36 | 0.40 | 0.44 | 0.48 | 0.52 | 0.56 | 0.60 | 0. | 0.70 | 0.78 | 0.86 |
| B | 0.42 | 0.46 | 0.50 | 0.54 | 0.58 | 0.62 | 0.66 | 0.70 | 0.74 | 0.80 | 0.88 | 0.96 | |
| MT2 | A | 0.46 | 0.50 | 0.54 | 0.60 | 0.66 | 0.72 | 0.76 | 0.84 | 0.92 | 1.00 | 1.10 | 1.20 |
| B | 0.56 | 0.60 | 0. | 0.70 | 0.76 | 0.82 | 0.86 | 0.94 | 1.02 | 1.10 | 1.20 | 1.30 | |
| MT3 | A | 0. | 0.70 | 0.78 | 0.86 | 0.92 | 1.00 | 1.10 | 1.20 | 1.30 | 1.44 | 1.60 | 1.74 |
| B | 0.84 | 0.90 | 0.98 | 1.06 | 1.12 | 1.20 | 1.30 | 1.40 | 1.50 | 1. | 1.80 | 1.94 | |
| MT4 | A | 0.92 | 1.02 | 1.12 | 1.24 | 1.36 | 1.48 | 1.62 | 1.80 | 2.00 | 2.20 | 2.40 | 2.60 |
| B | 0.12 | 1.22 | 1.32 | 1.44 | 1.56 | 1.68 | 1.82 | 2.00 | 2.20 | 2.40 | 2.60 | 2.80 | |
| MT5 | A | 1.28 | 1.44 | 1.60 | 1.76 | 1.92 | 2.10 | 2.30 | 2.50 | 2.80 | 3.10 | 3.50 | 3.90 |
| B | 1.48 | 1. | 1.80 | 1.96 | 2.12 | 2.30 | 2.50 | 2.70 | 3.00 | 3.30 | 3.70 | 4.10 | |
| MT6 | A | 2.00 | 2.20 | 2.40 | 2.60 | 2.90 | 3.20 | 3.50 | 3.80 | 4.30 | 4.70 | 5.30 | 6.00 |
| B | 2.20 | 2.40 | 2.60 | 2.80 | 3.10 | 3.40 | 3.70 | 4.00 | 4.50 | 4.90 | 5.50 | 6.20 | |
| MT7 | A | 2.70 | 3.00 | 3.30 | 3.70 | 4.10 | 4.50 | 4.90 | 5.40 | 6.00 | 6.70 | 7.40 | 8.20 |
| B | 3.10 | 3.20 | 3.50 | 3.90 | 4.30 | 4.70 | 5.10 | 5.60 | 6.20 | 6.90 | 7.60 | 8.40 | |
| 未注公差的尺寸允许偏差 | |||||||||||||
| MT5 | A | ±0. | ±0.72 | ±0.80 | ±0.88 | ±0.96 | ±1.05 | ±1.15 | ±1.25 | ±1.40 | ±1.55 | ±1.75 | ±1.95 |
| B | ±0.74 | ±0.82 | ±0.90 | ±0.98 | ±1.06 | ±1.15 | ±1.25 | ±1.35 | ±1.50 | ±1.65 | ±1.85 | ±2.05 | |
| MT6 | A | ±1.00 | ±1.10 | ±1.20 | ±1.30 | ±1.45 | ±1.60 | ±1.75 | ±1.90 | ±2.15 | ±2.35 | ±2.65 | ±3.00 |
| B | ±1.10 | ±1.20 | ±1.30 | ±1.40 | ±1.55 | ±1.70 | ±1.85 | ±2.00 | ±2.25 | ±2.45 | ±2.75 | ±3.10 | |
| MT7 | A | ±1.35 | ±1.50 | ±1.65 | ±1.85 | ±2.05 | ±2.25 | ±2.45 | ±2.70 | ±3.00 | ±3.35 | ±3.70 | ±4.10 |
| B | ±1.45 | ±1.60 | ±1.75 | ±1.96 | ±2.15 | ±2.35 | ±2.55 | ±2.80 | ±3.10 | ±3.45 | ±3.80 | ±4.20 |
| 材料代号 | 模塑材料 | 公差等级 | |||
| 标注公差尺寸 | 未注公差尺寸 | ||||
| 高精度 | 一般精度 | ||||
| ABS | 丙烯腈-丁二烯-苯乙烯共聚物 | MT 2 | MT3 | MT5 | |
| AS | 丙烯腈-苯乙烯共聚物 | MT2 | MT3 | MT5 | |
| CA | 醋酸纤维素塑料 | MT3 | MT4 | MT6 | |
| EP | 环氧树脂 | MT2 | MT3 | MT5 | |
| PA | 尼龙类塑料 | 无填料填充 | MT3 | MT4 | MT6 |
| 玻璃纤维填充 | MT2 | MT3 | MT5 | ||
| PBTP | 聚对苯二甲酸二醇酯 | 无填料填充 | MT3 | MT4 | MT6 |
| 玻璃纤维填充 | MT2 | MT3 | MT5 | ||
| PC | 聚碳酸酯 | MT2 | MT3 | MT5 | |
| PDAP | 聚邻苯二甲酸二丙烯脂 | MT2 | MT3 | MT5 | |
| PE | 聚乙烯 | MT5 | MT6 | MT7 | |
| PESU | 聚醚砜 | MT2 | MT3 | MT5 | |
| PETP | 聚对苯二甲酸乙二醇酯 | 无填料填充 | MT3 | MT4 | MT6 |
| 玻璃纤维填充 | MT2 | MT3 | MT5 | ||
| PF | 酚醛塑料 | MT2 | MT3 | MT5 | |
| MT3 | MT4 | MT6 | |||
| PMMA | 聚甲基丙烯酸甲酯 | MT2 | MT3 | MT5 | |
| POM | 聚甲醛 | MT3 | MT4 | MT6 | |
| MT4 | MT5 | MT7 | |||
| PP | 聚丙烯 | MT3 | MT4 | MT6 | |
| MT2 | MT3 | MT5 | |||
| PPO | 聚苯醚 | MT2 | MT3 | MT5 | |
| PPS | 聚苯硫醚 | MT2 | MT3 | MT5 | |
| PS | 聚苯乙烯 | MT2 | MT3 | MT5 | |
| PSU | 聚砜 | MT2 | MT3 | MT5 | |
| RPVC | 硬质聚氯乙烯（无强塑剂） | MT2 | MT3 | MT5 | |
| SPVC | 软质聚氯乙烯 | MT5 | MT6 | MT7 | |
| VF/MF | 酚醛塑料和氨基塑料 | 无机填料填充 | MT2 | MT3 | MT5 |
| 有机填料填充 | MT3 | MT4 | MT6 | ||
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