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Break-In Procedure
15
The E800Z is a high-precision, high-speed motor-spindle, the following procedure must be followed to
ensure proper operation and longevity.
During transportation, storage or installation the grease inside the bearings will settle. If the motor-
spindle is suddenly run at high-speed excessive heat will cause bearing damage. After installation,
repair, initial operation, or long periods of non operation please follow the break-in procedure detailed in
Table 3 for E800Z
Steps
min
-1
(rpm)
Running Time
Items to Check
Cutting tool cautions
16
（1） The proper surface speed for vitrified grindstones is 600-1800m/min.
CAUTION
！
Do not exceed a surface speed of 2,000m/min for grinding.
Surface Speed （ m/min）＝
（2） Do not exceed 13㎜ overhang for mounted grindstones. In case overhang must exceed 13㎜ reduce
the motor speed in accordance with Fig.26 and Table 4.
Table 4.Overhang and Speed
Overhang （㎜）
20
25
50
※ N=Max. operating speed at 13㎜ overhang.
（3） Do not use tools with bent or broken shanks, cracks or excessive runout.
（4） Dress the grindstone prior to use.
（5） For grinding the maximum depth of cut should not exceed 0.01㎜ radially or axially. Reciprocate the
tool several times after each in feed step.
（6） Always operate tools within the tool manufacturer , s recommended speed limits. Use of a tool
outside of the manufacturer , s recommended speed limits could cause damage to the spindle and
injury to the operator.
（7） Keep the tool shank and collet clean. If contaminants are left in the collet, they can cause excessive
runout and damage the tool and spindle.
（8） Do not drop or hit spindle.
19
1
10,000
5Min.
No abnormal noises
or vibration. Check
lubricator oil supply.
3.14×Diamete （㎜） × rotation speed （min
Max. Operating Speed （min
Ｎ×0.5
Ｎ×0.3
Ｎ×0.1
Table３
2
30,000
2Min.
Spindle Housing no
hotter than 20 C. If
hotter than 20 C stop
for at least 20
minutes, check
installation and
restart Break-In
procedure.
1000
−１
）
3
50,000
2Min.
Spindle Housing no
hotter than 20 C. If
hotter than 20 C stop
for at least 20
minutes, check
installation and
restart Break-In
procedure.
Fig.26
4
80,000
2Min.
Spindle Housing less
than 20C.
−1
）
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