ROHM Jaw cutting attachment - Manual (Page 4)

4
Uses
The BAV cutting
attachment is mainly
used for turning the
inside and outside
diameters of soft
jaws on 3-jaw
chucks.
It permits the chuck
to be adjusted to the
condition in which
it will later grip the
work piece (pretigh-
tening) within a few
seconds.
This assures
positive gripping
and accurate
concentricity of the
machined clamping
surfaces of the
chuck jaws in the
tightened condition.
Applications
a) Turning soft top
jaws
b) Turning soft solid
jaws (See remarks)
c) Finish-grinding
hardened top jaws
(See remarks)
Design
features
A forged scroll with
a knurled ring is
manually rotated in
a robust housing to
move 3 setting jaws
provided with one
suspension bolt each
inward or outward.
The setting jaws
are reversible. The
knurled ring is turned
clockwise to reduce
the suspension
diameter, anti-clock-
wise to increase the
suspension diameter.
Use
a) Turning inside
diameters
• Use workpiece to
adjust the jaws
to be fi nished to
the required dia-
meter (taking into
account the machi-
ning allowance).
• Position BAV
cutting attachment,
introducing the
bolt heads of the
setting jaws into
the counterbores
of the soft jaws.
• Turn knurled ring
anti-clockwise as
far as it will go.
• Using the manual
adjusting key,
fi rmly tighten the
chuck inwardly
against the bolt
heads of the set-
ting jaws (without
workpiece).
• Turn jaws.
• Open chuck and
remove BAV
cutting attachment.
b) Turning outside
diameters
• Use workpiece to
adjust the jaws
to be fi nished to
the required dia-
meter (taking into
account the machi-
ning allowance).
• Position BAV
cutting attachment,
introducing the
bolt heads of the
setting jaws into
the counterbores
of the soft jaws.
• Turn knurled ring
clockwise as far as
it will go.
• Using the manual
adjusting key,
fi rmly tighten the
chuck outwardly
against the bolt
heads of the set-
ting jaws (without
workpiece).
• Turn jaws with
recessing tool.
• Open chuck and
remove BAV
cutting attachment.
Normal
jaw position
Suspension range
Suspension range
Suspension
bolt
Knurled
ring
Setting
jaw
Housing
with scroll
Jaws
reversed
BAV Type 091 Jaw Cutting Attachment GB
Turning the outside diameter of
soft jaws Turning the inside diameter of
soft jaws