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        Centering tool & Reamer

        Recommend condition for Carbide Reamer

        Recommend condition for Carbide Reamer
        Workpiece Diameter (mm) Cutting condition
        Quality of material Tensile strength
        (Kg/mm2) /
        Hardness (HB)        		 V (m/min) f (mm/rev)
        Carbon steel ~ 100 ~10
        10~25
        25~40        		 8 ~ 12 0.15 ~ 0.25
        0.20 ~ 0.40
        0.30 ~ 0.50
        100 ~ 140 ~10
        10~25
        25~40        		 6 ~ 10 0.12 ~ 0.20
        0.15 ~ 0.30
        0.20 ~ 0.40
        Cast steel 40 ~ 50 ~10
        10~25
        25~40        		 8 ~ 12 0.15 ~ 0.25
        0.20 ~ 0.40
        0.30 ~ 0.50
        50 ~ 70 ~10
        10~25
        25~40        		 6 ~ 10 0.12 ~ 0.20
        0.15 ~ 0.30
        0.20 ~ 0.40
        Cast iron ~ 200 ~10
        10~25
        25~40        		 8 ~ 15 0.20 ~ 0.30
        0.30 ~ 0.50
        0.40 ~ 0.70
        200 ~ ~10
        10~25
        25~40        		 6 ~ 12 0.15 ~ 0.25
        0.20 ~ 0.40
        0.30 ~ 0.50
        Aluminum alloy   ~10 15 ~ 25 0.20 ~ 0.30
        0.30 ~ 0.50
        0.40 ~ 0.70
          10~25
        25~40        		 20 ~30

        Effect on chamfer

        Effect on chamfer
        Shape Feature
        If Feed stopped on Sharpe edge of flute, it make mark on machine surface.
        The work surface of R is good, but the work surface of R is difficult, and vice versa.
        It is called a double-edged shape. The chip can be created in two layers and produce good results, but it is difficult to regrinding.
        1 to 2 in the information section of the cutting edge, the cutting edge is long and Tool life is limited. A good effect can be obtained from finish machining.
        The second-tier guidebook is 10 to 20。 It is economical because the Cutting Flute is relatively short and has a long distance.
        Used for finish machining and applied to hand reamer.

        Effect on Helix

        Effect on Helix
        Helix direction Feature
        Straight angle(Helix angle 0°)
        • Normally surface is rough without cast iron.
        The right Helix angle flute
        • Good machinability and good chip emission.
        • There is a wide area of application of workpiece.
        • Excellent in high hardness workpiece.
        The left Helix angle flute
        • Surface roughness is good for aluminum, copper, and copper alloy.
        • Effective to workpieces of light material.

        Trouble Shooting

        Trouble Shooting
        Trouble issue Cause Solution
        Big hole Maximize effect on burnishing
        • Reduce chamfer angle.
        • Enlarge on Margin width.
        • Reduce Back Taper.
        • Grind to chamfer in second.
        • Check the proper diameter of the reamer.
        Hold down the occur Built-up edge.
        • Enlarge on Margin width.
        • Grind to chamfer in second.
        • Change the heat treatment conditions and organization of workpiece.
        • Increase cutting speed and reduce feed.
        • Supply with cutting oil sufficiently.
        Reduces the imbalance in cutting force.
        • Make sure that the cutting edge is within 0.005mm.
        • Increase the cutting speed.
        • Reduce the deviation between the main shaft and the basic diameter.
        • Check to wear condition for bush and replace.
        • Replace water-soluble cutting oil to non-soluble cutting oil.
        Small hole Reduce the finish effect
        • Increase the cutting edge clearance angle.
        • Reduce the margin width.
        • Enlarade on Back Taper.
        • Increase the cutting speed.
        Roughness Reduce the Chattering.
        • Improve the strength of a machine.
        • Use to Left hand cut reamer.
        • Enlarge on Margin width.
        • Enlarge on Back Taper.
        • Reduce the cutting speed.
        • Increase the feed.
        Surface roughness faulty Enlarge on Burnishing.
        • Use to Left hand cut reamer.
        • Reduce the chamfer angle.
        • Grind to chamfer in second.
        Remove the fusion.
        • Increase the Rake angle.
        • Increase the cutting speed.
        • Reduce the feed.
        Remove the chattering.
        • Make sure that the cutting edge is within 0.005mm.
        • Increase the cutting speed.
        • Alignment of the main shaft and the basic diameter.
        • Replace water-soluble cutting oil to non-soluble cutting oil.
        Remove chip interference.
        • Replace the Flute type.
        • Increase the depth for Flute.