Compensated workpiece clamping chuck QLC series

for precision engineeringfor turning applicationsfor finishing

Overview
QLC sliding-jaw power chucks are universal workholding devices designed for turning operations. They replace standard collets or conventional wedge-style chucks to provide a wider gripping range, improved clamping force and compatibility with higher spindle speeds via centrifugal compensation.

Why invest in a QLC?

• Increased clamping force and improved repeatability compared with standard wedge-style chucks, suitable for heavy cutting and high-volume production.
• Centrifugal-force compensation enables higher RPM operation while maintaining clamping accuracy.
• Modular jaw options compatible with industry-standard top tooling for cost-effective replacements.
• Reduced rotating mass and optional quick-change jaw systems shorten setup and changeover times.
• Adaptable base jaws allow configuration for special applications (ID/OD or variable-diameter stock).

QLC styles available

• QLC — 3-Jaw, Wedge Style Power Chuck
  Universal sliding-jaw chuck with large through-hole. Sizes: 110–140 mm.
• QLC-KT — 3-Jaw, Heavy Duty
  Solid center configuration for heavy cutting. Sizes: 160–400 mm.
• QLC-KS — 3-Jaw, Large Bore
  Increased through-hole for larger diameter workpieces. Sizes: 200–400 mm.
• QLC-AG — 3-Jaw, Compensating
  Compensating model for off-center parts with high precision. Sizes: 200–315 mm.
• QLC-LM — 3-Jaw, Low Maintenance
  Maintenance-reduced design following QLC principles. Sizes: 200–500 mm.
• QLC-LS — 2-Jaw, Long Stroke
  Extended stroke for large diameter variation (up to ~95% more stroke). Sizes: 160–315 mm.
• QLC MIR — Power Chuck with Quick Change Jaw System
  Quick-change solution for ID and OD gripping. Sizes: 200–500 mm.
• QLC SWB — Power Chuck with Jaw Quick Change System
  Optimized for recurring small batches; patented SWB quick-change jaw system with locking key.

Reasons To Buy QLC Chucks
Advantages

• Base jaw design reduces wear compared with traditional sliding-jaw concepts.
• Precision-ground jaw guides limit lubricant loss and improve consistency between setups.
• Multiple jaw guide profiles deliver controlled and uniform clamping forces.
• Backlash-free wedge-hook design provides high clamping forces and repeatability.
• Centrifugal compensation allows safe operation at higher spindle speeds.
• Hardened, ground and finished sliding surfaces increase service life.
• Base jaw formats conform to common European and US specifications for interchangeability.
• Optional quick-change jaw systems (MIR / SWB) reduce downtime for jaw changes.

Technical Features

• Patented backlash-free wedge hook.
• Patented multiple-profile base jaw concept.
• Nitrided chuck body for extended durability.
• Patented force-feed circular lubrication system.
• Centrifugal compensation mechanism for higher RPM capability.

Applications

• Job shops and contract manufacturers.
• High-volume turned parts production.
• Heavy-duty machining and roughing operations.
• Finishing and precision turning with compensating models for off-center parts.
• Flexible solutions for variable-diameter stock and quick-change requirements.

Technical specifications

• Product family: QLC sliding-jaw power chucks (QLC, QLC-KT, QLC-KS, QLC-AG, QLC-LM, QLC-LS, QLC MIR, QLC SWB).
• Size ranges: 110–140 mm (QLC); 160–400 mm (QLC-KT); 200–400 mm (QLC-KS); 200–315 mm (QLC-AG); 200–500 mm (QLC-LM); 160–315 mm (QLC-LS); 200–500 mm (QLC MIR / SWB).
• Wedge-hook clamping system with backlash-free operation.
• Counter-centrifugal compensation for high-speed capability.
• Multiple jaw guide profiles and standardized base jaw interfaces.
• Nitrided body and hardened sliding surfaces; force-feed circular lubrication (patented).
• Optional quick-change jaw systems for rapid ID/OD conversions.