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Automatic indexing chucks 210 - 850 mm AXN®
hydraulic clamping and indexing Automatic
2 jaws indexing chuck
Divisions: 4 x 90°/8 x 45°/3 x 120°/6 x 60° or specials
Unique indexing system
Extremely simple and rigid indexing system
On the indexing shaft there is a triangle,
square or multiple face shape. The indexing
shaft "A" is rotated by the piston "C" and
is locked in position by the piston "B".
For clamping and indexing 4 hydraulic lines
are needed.
Fig. 1 - Pressure in P1 Fig. 2 Pressure in P2 (indexing) Fig. 3 - Pressure in P1
Indexing shaft A locked in position 1 The locator B retracts and releases the The nger C retracts, while the locator
by the locator B: turning operation on indexing shaft A; the nger C moves B moves forward rotating the shaft A
the rst side of the component forward and rotates the shaft by 45° to 90° and locking it in position 2 for
machining of the work-piece
Centrifugal force compensation system 4
Unique hydraulic system designed to reduce the loss of grip
ping force caused by the centrifugal force on the
clamping piston P and clamping jaw A.
The counterweight M is in a radial hole in the chuck body
connected to the hydraulic circuit through the non-return
valve V.
During rotation, the pressure created by the counterweight
M increases the pressure on the clamping piston P and
compensates for the loss of gripping force due to the cen-
trifugal force.
Indexing position control system
The indexing control is mounted on the oil manifold. It is actua-
ted by a rod system and monitored by 4 proximity switches.
The cam "E" on the indexing jaw moves the rear switch ring
"N" via the rod "F", lever "H", rod "G" and pullback spring
"M".
The corresponding proximity switch for each indexing position is
actuated by the switch ring "M" and conrms, that the
indexing position is being reached.
Interchangeability between AXN indexing chuck and front end power chuck HYD-S
The AXN chuck can easily and quickly be changed with a front end power chuck with 3 or 4 jaws type HYD-S. The oil manifold and the
tube bundle remain mounted on the machine to actuate the chuck.
SMW-AUTOBLOK 143
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