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外徑

內(nèi)徑

螺紋

鉆具接頭 外徑

鉆具接頭內(nèi)徑

中間加厚直徑

in.

in.

in.

in.

in.

3-1/2

2-1/4

NC38

4-3/4 (4-7/8, 5)

2-1/4

4

2-1/16

2-1/16

4

2-1/2

NC40

5-1/4

2-1/2

4-1/2

2-9/16

2-9/16

4-1/2

2-11/16

NC46

6-1/4

2-11/16

5

2-3/4

2-3/4

2-13/16

2-13/16

5

3

NC50

6-5/8

3

5-1/2

5-1/2

3-1/4

5-1/2FH

7 (7-1/4, 7-1/2)

3-1/4

6

3-3/8

3-3/8

3-7/8

3-7/8

4

4

6-5/8

4

6-5/8FH

8 (8-1/4, 8-1/2)

4

7-1/8

4-1/2

4-1/2

5

5

*焊接和整體加重鉆桿均適用