Cuttermasters Professional JXT - Page 16

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CUTTERMASTER Professional JXT User’s Manual
Page 16
sound “un-fatigued” base material before putting the tool back into service (best done on a CNC).
Do not over grind the diameter to get rid of the chipped utes or the tool geometry will be ru-
ined, reducing tool performance. The DC Tower has been designed to mount a variety of wheels,
severalofwhichcanbesettogrindtheuterakefacefreeofchipsandspalling.Thisprocedureis
anacquiredskill,asitisnotaxturedoperation.Ifthetoolsareexpensiveperformancetools,they
should probably be reground on a CNC.
Finally, if the tool has been ruined through overuse it is most likely not a candidate for regrinding and
reintroduction into the same production environment from which it came (with the exception of ends,
whichcanbeeasilycuto󰀨,gettingyouintogoodmaterial).
General Approach
Never wait until the material shows signs of fatigue to sharpen. The best approach, as far as pro-
cedure goes, is to regrind the primary relief until all of the wear has been removed, being careful to
preserve as much diameter as possible. Be careful to closely check the factory angle as you start, for
reference.
sharpen carbide tools with them and, conversely, diamond wheels will plug up if used to sharpen high
speed steel.
CBN wheels can be used to excellent advantage on HSS tools, providing 50 to 100 times the life at 10
times the cost of Al
2
O
3
.CBNalsoproducesbetternishesandhigheraccuracythanAl
2
O
3
because the
abrasive and bond/backing materials are thermally conductive, absorbing and dissipating much of the
heat produced.
Once you have separated the tools, install the correct wheel for the material you are going to sharpen
onthemachine.Generally,onewillhavebetterresultsusingthenergritwheelsandlightercuts,ver-
sus coarser wheels and heavier cuts
Organize the grinding project by separating the tools into groups by size and condition of the tool.
The tools requiring the most work should be left to last as they require more severe cutting action and
avarietyofoperationssuchasendgashingorotheradditionalendproling.
Sharpening tools that require heavy work involves additional setups. It is advisable to consolidate
these setups based on similarity. This method helps produce more uniform results through the job,
reduces operator fatigue from repetitive setup and setup error.
• If the end is broken and needs to be repaired, this is a special project. It is probably best
  toleavethesecutterstothelast,astheyshouldbecuto󰀨withacuto󰀨wheelandthen
  recongured.
• From a time point of view, be selective about which tools to repair, because it requires
  keenskillsandtheuseofdi󰀨erentwheelssuchasacut-o󰀨wheelortheuseofawheel
  suchasa12V9or1A1toproducetheclearanceprole(gash)ontheend.
If the cutter has been too badly abused you will not be able to bring it to a satisfactory state by
re-grinding. Overuse or allowing a cutter to become too dull before re-sharpening can fatigue the
cutter material itself, as well as ruin the geometry. In this case, talk to your supervisor or the owner
of the cutter before attempting to sharpen the tool. The best option might be to just return it to the
person who ruined it, as is.