Next Generation Skwezloc Concentric Locking Collar Design

 

The Skwezloc® concentric locking collar design first debuted in 1966.  In the early 2000’s, more competitive designs with concentric locking collars were introduced.

 

These designs require Turned, Ground, and Polished (T&P) shaft tolerances.

 

The Sealmaster next generation Skwezloc Concentric Locking Collar has been redesigned to accommodate “Commercial” Turned and Polished (T&P) shaft tolerances with improved lock reliability of T&P shaft tolerances.

 

 
Next Generation Skwezloc® Concentric Lock Design
Next Generation Skwezloc® Concentric Lock Design
Next Generation Skwezloc® Concentric Lock Design

 

Features of the Next Generation Skwezloc® Locking Collar Design include:

 

  • Innovative circumferential groove on the inner ring bore that improves shaft grip.
  • Larger cap screw and collar for improved clamping force to the shaft.
  • Potential user cost reduction on shafting by specifying “Commercial” tolerances.
  • Same simple single screw installation.
  • Patented design.

 

SHAFT DIAMETER OLD TOLERANCE RANGE TURNED, GROUND & POLISHED(T&P) NEW TOLERENCE RANGE** COMMERCIAL SHAFTING TURNED & POLISHED(T&P)
1/2" to 2" +.0000 / -.0005" +.000 / -.003"
2 1/8" to 2 7/16" +.0000 / -.0010" +.000 / -.004"

 

Push Off Hold Force Comparison

 

Note: all value exceed axial load capacity of the bearing

 

*In laboratory axial push off testing for 1 7/16", the next generation design resulted in:

 

  • 85% holding force improvement on turned, ground & polish Shafting vs old design;
  • 59% holding force improvement on turned, ground & polish Shafting vs leading competitor; and
  • 113% holding force improvement on turned & polish shafting vs leading competitor

 

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