jackymechanical

Rotary table enables the process of drilling holes on a drilling rig by providing rotational force to the string of the drill. It is a precision work positioning devices that is used in metalworking. With such a table, an operator can cut or drill the work around a fixed axis. Here are the components of a rotary tables:

Rotary Locks

Almost all the rotary tables have rotary lock. The lock prevents the table from turning in one direction or from turning at all. This component is mostly used as an alternative of using a second pair of tongs for breaking out or making the pipe.

Chain Drive

Most of the rotary actuators are operated by chain. These chains are similar to the large bicycle chains and you need to constantly oil them to prevent from jamming or burning.

Bushings

Bushings are present at the center of the tables and can be removed in two separate pieces. The large gap in the rotary bushing center is called bowl. In bowl, slips are set for holding the drill string when the pipe and connections trips. These bushings connect to the Kelly bushings for inducing the spin which is required for drilling.

Most of the rotary tables are nowadays no coming with rotary drives. Instead, they have top drive technology where the drill string is moved by mechanism located at the Kelly.

There are some rotary drives that use index plates for the purpose of indexing, whereas, others come with dividing plates. These plates lead to the regular work positioning at divisions where indexing plates cannot be used. Rotary actuators are used for machining spanner flats on bolt, for drilling equidistant holes on circular flanges, cutting round pieces as well as for creating large diameter-holes which small milling machines fail to do.