直柄手用鉸刀，直柄機用鉸刀和錐柄機用鉸刀都有精度等級，老標有D級，D4級，D5級，新標有H7級，H8級，H9級；老標切削刃短，造價便宜，新標切削刃長，價格較貴。老標D級精度最高，新標H7級精度最高。
附表 高速鋼機用鉸刀的直徑公差（GB1133－84） (mm)
鉸刀直徑
直徑的極限偏差
H7級精度鉸刀
H8級精度鉸刀
H9級精度鉸刀
＞5.3～6
+0.010
+0.005
+0.015
+0.008
+0.025
+0.014
＞6～10
+0.012
+0.006
+0.018
+0.030
+0.017
＞10～18
+0.022
+0.036
+0.020
＞18～30
+0.009
+0.028
+0.016
+0.044
＞30～50
+0.021
+0.033
+0.019
+0.052
＞50～80
+0.039
+0.062
＞80～100
+0.029
+0.045
+0.026
+0.073
+0.042
硬質合金機用鉸刀的直徑公差 (mm)
+0.007
+0.001
+0.023
+0.011
+0.027
+0.043
+0.013
＞30～40
+0.040
直柄手用鉸刀，直柄機用鉸刀和錐柄機用鉸刀都有精度等級，老標有D級，D4級，D5級，新標有H7級，H8級，H9級；老標切削刃短，造價便宜，新標切削刃長，價格較貴。老標D級精度最高，新標H7級精度最高。
附表 高速鋼機用鉸刀的直徑公差（GB1133－84） (mm)
鉸刀直徑
直徑的極限偏差
H7級精度鉸刀
H8級精度鉸刀
H9級精度鉸刀
＞5.3～6
+0.010
+0.005
+0.015
+0.008
+0.025
+0.014
＞6～10
+0.012
+0.006
+0.018
+0.010
+0.030
+0.017
＞10～18
+0.015
+0.008
+0.022
+0.012
+0.036
+0.020
＞18～30
+0.017
+0.009
+0.028
+0.016
+0.044
+0.025
＞30～50
+0.021
+0.012
+0.033
+0.019
+0.052
+0.030
＞50～80
+0.025
+0.014
+0.039
+0.022
+0.062
+0.036
＞80～100
+0.029
+0.016
+0.045
+0.026
+0.073
+0.042
硬質合金機用鉸刀的直徑公差 (mm)
鉸刀直徑
直徑的極限偏差
H7級精度鉸刀
H8級精度鉸刀
H9級精度鉸刀
＞5.3～6
+0.012
+0.007
+0.018
+0.001
+0.030
+0.019
＞6～10
+0.015
+0.009
+0.022
+0.014
+0.036
+0.023
＞10～18
+0.018
+0.011
+0.027
+0.017
+0.043
+0.027
＞18～30
+0.021
+0.013
+0.033
+0.021
+0.052
+0.033
＞30～40
+0.025
+0.016
+0.039
+0.025
+0.062
+0.040