Table of contents
3QLCLM
Edition: 04/2014
11
4.0 Design and function
4.1 General description
3QLCLM power chucks are wedge hook chucks with large through hole, centrifugal force
compensation and integrated lubricant reservoir. Thanks to hermetic sealing, these are
maintenance-free and insensitive to dust. They are suitable for use as universal chucks for almost all
lathe operations:
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for heavy duty machining of disc and rod-shaped parts
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for delicate finishing of easily deformable work pieces.
The new series of 3QLCLM power chucks is a result of consistent development of existing power
chuck (QLC) and has proven design elements. Type 3QLCLM power chucks were developed by using
computer-assisted calculation methods and are manufacturing using high-quality steel with most
advanced production technology (developed and manufactured under ISO 9001). Power chuck sizes
of 160, 200, 250, 315 and 400 mm diameter. The main features of Type 3QLCLM power chuck are
described below:
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Innovative master jaw profile with optimal guide length.
•
Jaw guides customized to profile to avoid loss of lubricant.
•
Improved efficiency due to the multiple jaw guides and shortened jaw radius.
•
Integrated lubricant reservoir with improved forced circulation.
•
Zero backlash wedge hook mechanism for maximum gripping force and accuracy.
•
Centrifugal force compensation for maximum speeds.
•
Large through hole for rod works.
•
Selected material pairing - all force-transmitting parts are hardened and polished
•
Simplified form through piston connection in the chuck and not sliding in the rear side.
•
Base jaw connections based on European and international standard.
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Developed and manufactured under ISO 9001.
•
Thanks to suitable accessories - actuation cylinder, hard or soft top jaws matching the work piece
and drawbar or the pull rod as connection element between power chuck and actuation cylinder -
complete solution as modern and powerful power chuck device.
The zero backlash wedge hook mechanism (domestic and foreign patents) guarantees maximum
clamping accuracy, irrespective of functional and manufacturing-related dimensional differences of the
individual parts. Counterweights behind the master jaws reduce the centrifugal force of the jaw and
allow use of 3QLCLM - chuck with high or delicately reduced gripping force in all speed ranges. The
lubricant reservoir in the sealed chick body ensures the force-transmitting sliding surfaces with each
chuck stroke and ensures constant gripping force with extended maintenance intervals.
The jaw profile (patented) offers an optimal guide length for inner and outer clamping, reduces the
load and wear and tear and prevents entry of coolant fluid as well as spinning of lubricant grease. The
manufacturing of all chuck components in highest FORKARDT quality guarantees a long service life
and reliable function (monitoring with the most modern testing equipment / quality assurance in
accordance with ISO 9000).
