The work spindle is referred to as the C axis and, if a rotary table is incorporated, its centre line is the B axis.
12.
Many horizontal mills also feature a built-in rotary table that allows milling at various angles; this feature is called a " universal table ".
13.
The rotary table as a fourth drive axis does not enhance the measuring dimensions, which remain 3D, but it does provide a degree of flexibility.
14.
The "'kelly "'is the polygonal tubing and the " kelly bushing " is the mechanical device that turns the kelly when rotated by the rotary table.
15.
Rather, Hazelwood said, the oil and gas driller has to turn scavenger, getting tongs here, mud pumps there, rotary tables somewhere else and blocks from a fourth source.
16.
With the table mounted on a secondary table, the workpiece is accurately centered on the rotary table's axis, which in turn is centered on the cutting tool's axis.
17.
After reviewing the drilling process, Herrmann and Scott found that a lot of time and money was being wasted at the rotary table, the heart of the rig.
18.
"' Slips "'is a device used to grip and hold the upper part of a drill string to the drill floor on an Rotary table-machinery that makes the pipe rotate.
19.
The drawworks often has a pulley drive arrangement on the front side to provide turning power to the rotary table, although on many rigs the rotary table is independently powered.
20.
The drawworks often has a pulley drive arrangement on the front side to provide turning power to the rotary table, although on many rigs the rotary table is independently powered.
