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Tutorials & training: Boring bar fine aligning

Updated: 15 hours ago

Fine aligning the MPB60 boring bar
Fine alignment of a Boring Bar in an Excavator Grapple
 

MPB60 - Fine aligning of a boring bar


Precise alignment is crucial for optimal machining results and for reducing equipment strain by minimizing vibrations during operation. There are multiple methods and possibilities to fine-align a boring bar to the application. The method chosen may vary depending on the conditions and positioning of the bores. In the instructional video below, we demonstrate the use of dial gauges to achieve the required precision.




ce the boring bar is roughly aligned, it needs to be fine-aligned to the application. The first step is to identify a center point on the application to serve as the machining reference. The center point may be a plane or a position within the existing bores. In some cases, full 3D measurements are required to define the center point.


Place the dial gauges at each end bore to begin the alignment process. For greater precision, position the dial gauges as close to the bearing positions as possible. Begin by fine-aligning one bore at a time. Measure the boring bar's position relative to at least two reference points, preferably aligning with the set screws on the mounting plate.


Adjust the set screws on the bearing housings to fine-tune the boring bar's position. Continuously measure while making adjustments. Repeat the procedure until the bar is correctly positioned according to the defined center and application requirements. Ensure this process is completed for both end positions.



Alternatively, you can adjust two positions simultaneously. Correct the deviation in one position, then the other, repeating until the alignment is satisfactory.


After individually aligning both bearing positions, remeasure to confirm the correct positioning and to ensure the fine alignment has not shifted. Make further adjustments if needed.


If additional support bearings are required, always measure at two points 90° apart while tightening to ensure alignment remains accurate.


After fine-aligning all bearing positions, recheck all measurements to confirm proper alignment. To verify the alignment, slide the bar along the bearings. If it sticks, one or more bearings are misaligned, causing the rod to bend. Adjust as needed for smooth movement and precise alignment.


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