钻具接头扣型尺寸.doc

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1、接头扣型尺寸接头数字或尺寸对应钻具及钻头国内编码公端根径(mm)公端小径(mm)公扣长度(mm)母扣内径(mm)母扣长度(mm)NC26(2-3/8"IF)2-3/8"DP2A11×2A1073.160.476.274.679.4NC31(2-7/8"IF)2-7/8"DP211×21086.171.388.987.792.1NC38(3-1/2"IF)3-1/2"DP311×31010285.1101.6103.6104.8NC46(4"IF)4A11×4A10122.8103.7114.3124.6117.5NC50(4-1/2"IF)5"DP411×

2、410133.4114.3114.3134.9117.52-7/8"FH221×22092.170.18894.5953-1/2"FH321×320101.477.695.2102.898.44-1/2"FH421×420121.796.3101.6123.8104.85-1/2"FH7"DC521×520148126.8127150.5130.26-5/8"FH621×620171.5150.4127173.8130.22-3/8"REG3-3/4"BIT2A31×2A3066.747.676.268.379.42-7/8"REG231×23076.25

3、488.977.892.13-1/2"REG6-1/8"BIT331×33088.965.195.290.598.44-1/2"REG8-1/2"BIT431×430117.590.5108119.1111.15-1/2"REG531×530140.2110.1120.6141.7123.86-5/8"REG12-1/4"BIT/8"DC631×630152.2131127154130.27-5/8"REG17-1/2"BIT731×730177.8144.5133.4180.2136.58-5/8"REG831×830202167.8136.5204.4

4、139.71-内平IF，2-贯眼FH，3-正规REG。