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Videos

SK Collet Chucks Presentation

Wednesday, July 5, 2017

With over 1 million SK collet chucks and over 15 million SK collets sold worldwide, the SK is a proven toolholder technology that manufacturers prefer due to the advanced design that consistently performs – here’s why:

  • Lean – narrow body design allows access to tight spots
  • Versatile – applicable for all milling, drilling, reaming, and rigid tapping applications
  • Flexible – covers sizes from 0.028” to 1”
  • Accurate – 2x more accurate than ER collet chucks, within 10x better repeatability
  • Extremely Precise – 0.0002” or less concentricity guarantee with on-size collets
  • Double Gripping Power – with an 8-degree collet taper, the SK collet chuck has double the gripping power over ER collet chucks

Watch the video to see why SK collet chucks are superior!

The Lyndex-Nikken SK (Slim Ken) collet chuck system is engineered for manufacturers who require a level of precision and rigidity that exceeds the capabilities of standard ER collet systems. As spindle speeds increase and part tolerances tighten, the interface between the machine and the cutting tool becomes the most critical link in the production chain.

Key Advantages of the SK System

While many shops treat collet chucks as simple consumables, the SK series is a precision instrument designed to solve specific machining challenges:

  • The 8-Degree Taper Advantage: Unlike the common 16-degree taper found in ER systems, the SK collet uses a shallower 8-degree taper. This geometry provides significantly higher clamping force and ensures that the tool is seated with absolute concentricity.

  • Superior Runout Accuracy: The SK system is guaranteed to provide runout accuracy within 3 microns at 3x the tool diameter. This precision ensures that every flute of the cutting tool carries an equal load, which is the single most effective way to prevent premature tool wear and vibration.

  • High-Speed Balance: All SK holders are precision-balanced as standard. This is essential for modern machining centers running at 15,000 RPM and above, where even the slightest imbalance can lead to harmonic chatter and poor surface finishes.

Solving the “Interference” Problem

In 5-axis machining and complex mold-making, clearance is often as important as rigidity. The “Slim” in Slim Ken refers to the reduced nose diameter of the holder. This design allows the tool to reach deep into narrow pockets or machine close to workholding fixtures without the risk of the clamping nut colliding with the workpiece.