Your single source for large diameter shaft-drilling equipment, tooling and installation methods.

Circulating Kelly Bars

The Steven M. Hain Company’s standard Circulating Kelly Bar is a 14-inch Square Kelly with a 12-inch bore. The overall length of the standard Circulating Kelly Bar is approximately 42-feet, with a drive length of 36-feet. The top connection is a left-hand thread box designed to fit a 12-inch I.D. Swivel. The approximate weight of the standard Circulating Kelly Bar is 6,000 lbs. Dependent upon your job requirements, the Steven M. Hain Company also offers Circulating Kelly Bars in custom lengths and sizes with threaded or flanged connections. A heavy-steel plate Drive Bushing, or "drop-in" Kelly Roller Drive, are also available to fit customers' Rotary Table requirements.