*If female Kelly Box is greater than male adapter and exceeds the torque rating, failure may occur. Jeffrey Machine will not be held responsible for failure due to over torque. Jeffrey Machine reserves the right to inspect if failure occurs.
Diameters: 24″– 144″Kelly boxes: All Kelly boxes made to customer specificationsBarrels: Cylinders up to 2” wall availableBarrels undersized to meet m..
Commonly Requested Diameters: 16″– 144″Kelly boxes: All kelly boxes made to customer specificationsGussets: 1″ thick gussets standardBarrels:➤ Up to 2..
Commonly Requested Diameters:14″– 144″ *Type: Type 6Cut: DC/DF, DC/SFKelly boxes: All boxes made to customer specificationsCenter Shaft: 4″ OD – 12″ O..