Variable rack adjustment assembly for pipe spinning machines

Details Variable rack adjustment assembly for pipe spinning machines Variable rack adjustment assembly for pipe spinning machines

B - Operations, Transporting

25

B

B25B 13/52 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2452149

A cam-operated, rack-on-rack adjustment assembly on a drill pipe spinner allows the user to easily and in small increments (distances) (three-eighths inch, one- quarter inch or less, or more) adjust the effective pipe engaging length of the drive chain. In other words, the effective length of chain wrap (the amount that grips the pipe) given the pipe size can be adjusted.

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