Advertisement
9 . CAUTIONS WHEN USING GRINDSTONES AND 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
manufacturer's 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. 12. If the overhang must exceed
13mm, reduce the motor speed in accordance with Table 2.
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 chuck clean. If contaminants are left in the collet chuck or chuck nut,
excessive run-out will cause damage to the cutting tool and or Spindle.
⑧ Do not strike or disassemble the Spindle.
⑨ Please minimize the tool overhang amount to maintaining high accuracy. 13mm is the maximum amount of
overhang to maintain high accuracy and safety.
Table 2 . Overhang and Speed
Overhang (mm)
20
25
50
※
N = Max. Operating Speed with 13 mm overhang.
3.14 x Diameter (mm) x rotation speed (min
=
-1
Max. Speed (min
) (rpm)
N x 0.5
N x 0.3
N x 0.1
1,000 x 60
13
-1
) (rpm)
Fig. 12
7
Advertisement
