10
Table. 3 Overhang and Speed
Overhang (mm)
Max. Speed (min
-1
) (rpm)
20
N x 0.5
25
N x 0.3
50
N x 0.1
N=Max. Operating Speed with 13mm overhang.
Fig. 12
13
13
. CAUTIONS WHEN USING GRINDSTONES AND TOOLS
3.14 x Diameter (mm) x rotation speed (min
-
1
)
(rpm)
1,000 x 60
Surface Speed (m/s) =
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
manufacturer's recommendations.
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. 12. If the overhang must
exceed 13mm, reduce the brushless motor speed in accordance with Table. 3.
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.
⑥
Always operate cutting tools within the allowable recommended speed of the cutting tools. Use of a cutting
tool outside of the allowable speed of the cutting tools could cause damage to the Spindle and injury to the
operator.
⑦
Keep the cutting tool shank and collet clean. If contaminants are left in the collet, excessive run-out will cause
damage to the cutting tool and or Spindle.
⑧
Do not strike or disassemble the Spindle.
⑨
Please set the cutting tools to minimize the overhang amount. 13mm is the maximum amount of overhang to
maintain high accuracy and safety.
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