HOWA MACHINERY H3EF, Инструкция по эксплуатации, Страница: 34 / 52

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2.5.3 Installing Chuck
(1) Remove the top jaws and cover before
attempting to install the chuck.
(2) The 8-inch chuck has a screw hole for
the eyebolt on the periphery. Screw
the attached eyebolt into this hole and
lift the chuck. To lift and install the
6-inch chuck, use the suspender belt.
(3) Advance the connecting rod to the
advance end by activating the
hydraulic or pneumatic circuit.
In this state, the distance
Re between
the front end face of the chuck adapter
and that of the connecting rod will be
as shown in Table 1.
Table1 (mm)
Chuck size 6 8
Re
±
1 40 47.5
J M16
×
2 M20
×
2.5
M (H9)
φ
12
φ
16
M2 31 37
M3 46over 54over
(4) Insert the Hex. key spanner equipped from the front side of the chuck and check to see
whether the draw screw can be turned.
(5) Hoist the chuck with the chain block and screw in the draw screw into the connecting rod
until it can be tightened no more.
If the dimension Re is less than that indicated in Table 1, the chuck
cannot be installed.
Adjust the screw depth of the connecting rod (Re) to a proper
length.
If the Re value is greater than that indicated in Table 1, the screw depth
of the connecting rod is not long enough to fully engage with the draw
screw. This will mean that the screw will be broken and all of the
gripping force will be lost immediately. If this accident should occur, the
work piece may fly off, and in turn may cause severe personal injury or
death to the operator or bystanders.
Fig. 4
Fig. 5
CAUTION
WARNING