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12 . CAUTIONS WHEN USING GRINDSTONES AND CUTTING TOOLS
CAUTION
The maximum surface speed or rpm is always specified for a grindstone. Do not exceed the maximum speed with
reference to the calculating chart below. Always follow the grindstone manufacturers' recommendations.
Surface Speed (m / s) =
① The proper surface speed for general grindstones is 10 -30m / s.
② Do not exceed 13mm of overhang for mounted grindstones as shown in Fig. 45. If the overhang must exceed 13mm, reduce the
motor speed in accordance with table 6.
③ Dress the grindstone prior to use.
④ Do not use cutting tools with bent or broken shanks, cracks or excessive run-out.
⑤ For grinding, the maximum depth of cut should not exceed 0.01mm radially or axially. Reciprocate the tool several times after each
pass to eliminate tool pressure.
3.14 x Diameter (mm) x rotation speed (min
1,000 x 60
-1
)
85
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