V. High internal hole surface roughness 

When there is high surface roughness in internal holes, measures can be taken as follows: reducing the cutting speed of tungsten carbide reamers; selecting cutting fluid based on materials being processed; reducing tool cutting edge angle; reducing reaming allowance; reducing reamer teeth number according to specific situation and enlarging the chip pocket or adopting reamers with tool cutting edge inclination to facilitate chip removal process; protecting reamers from being damaged during the grinding, using and transport; using fine oil-stone to repair reamers that are damaged or replacing them directly.

VI. Poor precision of hole position after reaming

When this happens, measures can be taken as follows: replacing guide sleeve regularly; lengthening the guide sleeve; repairing machine tool in time and adjusting the gap between principal axis and bearing.

VII. Reamer teeth tipping

When there is reamer teeth tipping problems, measures can be taken as follows: changing the prefabricated aperture size; changing allowance allocation and choosing cutting parameters reasonably; reducing reamer teeth number and enlarging chip pocket or grinding off one tooth.

IX. Out-of-straight hole center line after reaming

When the center line of hole after reaming is not straight enough, measures can be taken as follows: reducing tool cutting edge angle; replacing the tungsten carbide reamers with reaming pilot and lengthened cutting part; operating correctly.

 

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