MAG Maintenance Technologies: Mechanical Quill Units

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The MQ-12 Mechanical Quill Unit features as standard, a large 3 1/2" diameter, one piece construction ball screw quill assembly. This provides in-line thrust capability to the spindle. Standard spindles available are: 1-1/16" ID., 1-3/8" ID, and multiple spindle head drive. The MQ-8 Unit features as standard a 2-1/4 " diameter, one-piece construction ball screw quill assembly, which provides in-line thrust capacity to the spindle. Standard spindles are 3/4", 1-1/16", and head drive.

Ball Screw Quill Assembly
The units feature a combination ball screw quill assembly which is hardened and precision ground. The spindle is driven thru the center of the ball screw quill assembly and provides center line thrust with extreme stability. The quill when fully extended has a greater than 1:1 engagement vs. projection ratio.

Stroke and Positive Stop
Any portion of the total stroke can be utilized for feed or rapid traverse. Three standard commercial oil tight limit switches are used for controlling stroke. The units also feature a positive stop assembly with one inch of micro adjustment.

Operation of MQ-12-AC and MQ-8-AC
The mechanically actuated quill, upon initiating the cycle start, will rapid advance forward by energizing the built in rapid motor. The unit will rapid forward until the feed switch is actuated, at which point the rapid motor will brake and the transmission of the power will be generated from the spindle-feed motor through a timing belt drive to the feed system. The quill will continue forward at a constant feed rate until the full depth switch is actuated. The rapid motor will reverse and the quill will rapid return to the interlock limit switch. The standard MQ-8's rapid motor and both of the motors on the MQ-12 are de-energized in the back idle position, thereby providing the user the ultimate in energy conservation.

Feed Control of MQ-12-AC and MQ-8-AC
The spindle feed motor provides power transmission through a timing belt drive to both the spindle assembly and to the feed system. This design feature provides a constant feed per revolution characteristic. This feature maintains a constant chip load for improved tool life. Feeds and speeds are easily changed by replacing standard off-the-shelf timing belts and sheaves.

Operation of MQ-12-Servo and MQ-8-Servo
Upon initiating the cycle start, the mechanically actuated quill rapid advance forward through the servo rapid/feed motor until the feed switch is actuated, at which time the advance rate will be reduced to the desired feed rate. The quill will continue forward until it reaches the full depth limit switch. The servo rapid/feed motor is now reversed and the quill will be retracted to its original starting point. Spindle R.P.M. is controlled by a separate foot-mounted motor driven through a timing belt and sheave system. Spindle motors can be either conventional A.C. fixed R.P.M. or variable R.P.M., providing the customer a wide range of flexibility.

Optional Equipment
The MQ-12 and MQ-8 Mechanical Quill Units can also be supplied with many optional accessories. Some of these are: peck feed controls, rack-out quill assembly, dual feed controls, forward and back feed controls, tapping controls and continuous spindle rotation.

The Drillunit Promise
The entire line of Drillunit mechanical quill units is backed by our outstanding reputation for performance, quality, durability and service.

If we supply it, we support it!