ICS25.100.50J41JB/T8825.4-1998惠氏螺纹螺母丝锥Nuttapsforwhitworththreads1998-12-29发布1999-07-01实施国家机械工业局发布()前言本标准于1998年12月29日首次发布。本标准由全国刀具标准化技术委员会提出并归口。本标准主要起草单位:上海标准件工具厂、上海刃具厂。JB/T8825.4-1998()11范围本标准规定了惠氏螺纹螺母丝锥(以下简称螺母丝锥)的型式、尺寸和标记等的基本要求。本标准适用于加工螺纹代号为1/8~2惠氏螺纹螺母丝锥。2引用标准下列标准所包含的条文,通过在本标准中引用而构成为本标准的条文。本标准出版时,所示版本均为有效。所有标准都会被修订,使用本标准的各方应探讨使用下列标准最新版本的可能性。JB/T8825.2—1998惠氏螺纹丝锥螺纹公差JB/T8825.3—1998惠氏螺纹丝锥技术条件3型式和尺寸3.1公称直径d<6.350mm的丝锥型式按图1所示,尺寸在表1、表2中给出。图1表1mm螺纹代号每25.4mm上牙数公称直径d螺距PLll5d11/8–40BSW403.1750.6354017142.243/16–24BSW244.7621.0585026213.15注:表中切削锥长度l5为推荐尺寸。国家机械工业局1998-12-29批准中华人民共和国机械行业标准惠氏螺纹螺母丝锥NuttapsforwhitworththreadsJB/T8825.4-19981999-07-01实施JB/T8825.4-19982表2mm螺纹代号每25.4mm上牙数公称直径d螺距PLll5d13/16–32BSF324.7620.7944822183.157/32–28BSF285.5560.9075025204.00注:表中切削锥长度l5为推荐尺寸。3.2公称直径d≥6.350~25.400mm圆柄(无方头)的螺母丝锥的型式按图2所示,尺寸在表3、表4中给出。图2表3mm螺纹代号每25.4mm上牙数公称直径d螺距PLll5d11/4–20BSW206.3501.2706032274.55/16–18BSW187.9381.4116537295.63/8–16BSW169.5251.5887040337.17/16–14BSW1411.1121.8148047388.01/2–12BSW12.700859.09/16–12BSW1214.2882.11690544511.25/8–11BSW1115.8752.30995584812.53/4–10BSW1019.0502.540115685814.07/8–9BSW922.2252.822120726018.01–8BSW825.4003.175130786520.0注:表中切削锥长度l5为推荐尺寸。JB/T8825.4-19983表4mm螺纹代号每25.4mm上牙数公称直径d螺距PLll5d11/4–26BSF266.3500.9776029244.55/16–22BSF227.9381.1546534295.63/8–20BSF209.5251.2707038337.17/16–18BSF1811.1121.4117042368.01/2–16BSF12.700809.09/16–16BSF1614.2881.58885474011.25/8–14BSF1415.8751.81495544612.53/4–12BSF1219.0502.117115645514.07/8–11BSF1122.2252.309120685818.01–10BSF1025.4002.540130746320.0注:表中切削锥长度l5为推荐尺寸。3.3公称直径d≥6.350mm柄部带方头的螺母丝锥的型式按图3所示,尺寸在表5、表6中给出。图3表5mm方头螺纹代号每25.4mm上牙数公称直径d螺距PLll5d1al21/4–20BSW206.3501.2706032274.53.5565/16–18BSW187.9381.4116537295.64.5073/8–16BSW169.5251.5887040337.15.6087/16–14BSW1411.1121.8148047388.06.3091/2–12BSW12.700859.07.10109/16–12BSW1214.2882.11690544511.29.0012JB/T8825.4-19984表5(完)mm方头螺纹代号每25.4mm上牙数公称直径d螺距PLll5d1al25/8–11BSW1115.8752.30995584812.510.00133/4–10BSW1019.0502.540115685814.011.20147/8–9BSW922.2252.822120726018.014.00181–8BSW825.4003.175130786520.016.0020811–7BSW28.57522.418.0022411–7BSW731.7503.629150846925.020.0024211–6BSW638.1004.233170947831.525.0028431–5BSW544.4505.0801901078735.528.00312–214BSW4.550.8005.6442201209840.031.5034注:表中切削锥长度l5为推荐尺寸。表6mm方头螺纹代号每25.4mm上牙数公称直径d螺距PLll5d1al21/4–26BSF266.3500.9776029244.53.5565/16–22BSF227.9381.1546534295.64.5073/8–20BSF209.5251.2707038337.15.6087/16–18BSF1811.1131.4118042368.06.3091/2–16BSF12.700859.07.10109/16–16BSF1614.2881.58890474011.29.00125/8–14BSF1415.8751.81495544612.510.00133/4–12BSF1219.0502.117115645514.011.20147/8–11BSF1122.2252.309120685818.014.00181–10BSF1025.4002.540130746320.016.0020811–9BSF28.57522.418.0022411–9BSF931.7502.822150796725.020.0024831–8BSF34.92516028.022.4026211–8BSF38.100851–8BSF41.275431–7BSF44.45018035.528.00312–7BSF50.80020040.031.5034注:表中切削锥长度l5为推荐尺寸。3.4公称直径小于或等于7.938mm的螺母丝锥可制成外顶尖。JB/T8825.4-199853.5螺母丝锥公称切削角度,在径向平面内测量,推荐如下:a)前角γp为8°~10°;b)后角αp4°~6°。3.6标记示例右旋粗牙惠氏螺纹,螺纹代号为3/8-16BSW,每25.4mm上为16牙,2级公差带磨制丝锥:惠氏螺纹螺母丝锥3/8–16BSW–2JB/T8825.4—1998右旋细牙惠氏螺纹,螺纹代号为5/16–24BSF,每25.4mm上为24牙,切制丝锥:惠氏螺纹螺母丝锥5/16-24BSFJB/T8825.4—1998左旋粗牙惠氏螺纹,螺纹代号为1/2–12BSW,每25.4mm上为12牙,3级公差带磨制丝锥:惠氏螺纹螺母丝锥1/2–12BSWL–3JB/T8825.4—1998注:公称直径d≥6.350~25.400mm的螺母丝锥,柄部有方头和无方头(圆柄)两种结构。在需要明确指定柄部结构的场合,无方头的螺母丝锥名称前应加“圆柄”两字。4螺纹公差螺母丝锥螺纹公差按JB/T8825.2。5技术条件螺母丝锥技术条件按JB/T8825.3。6JB/T8825.4-1998中华人民共和国机械行业标准惠氏螺纹螺母丝锥JB/T8825.4-1998*机械工业部机械标准化研究所出版发行机械工业部机械标准化研究所印刷(北京首体南路2号邮编100044)*开本880×12301/16印张1/2字数12,00019XX年2月第一版1999年2月第一次印刷印数1-500定价5.00元编号98-226