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High-Speed Reaming and Boring
While the boring process enlarges a pre-drilled hole, reaming is a finishing process that follows the initial bore to finish diameters and surface. High-speed reamers utilize faster speeds and feeds with multi-edge tools tipped with carbide, cermet, or PCD, and thin film coatings improve performance. A step beyond standard reaming, high-speed reaming improves hole quality, achieves closer dimensional tolerance, and delivers exceptional surface finish. High-speed reamers offer multiple configurations, including expandable, solid, and replaceable ring reamers. As parts are reamed, a high-performance reamer will start to wear. Consequently, using a high-quality metalworking fluid is critical to assure part quality and extend tool life. When using metalworking lubricant, be sure it reaches the cutting edges for prolonged tool life. Other high-speed reamer performance considerations include:
It's crucial to leave the correct amount of hole stock to avoid rubbing and a loss of diameter. This attention to detail is essential to quality high-speed reaming.
The workpiece setup must be rigid, with no play in the machine spindle. This ensures a secure high-speed reaming process.
That the reamer, reaming speeds, and feeds will meet the requirements of the application.
It's important to keep the 'tool overhang ', which is the distance between the cutting edge of the tool and the machine spindle, to a minimum to prevent tool deflection and ensure accurate reaming.
It's important not to let 'reamer flutes ', which are the grooves on the cutting edges of the reamer, be blocked with chips to maintain the cutting efficiency and quality of the reaming process.
Regrind to maintain reamer sharpness to assure hole quality and tool life.