Next Generation Skwezloc

CONCENTRIC LOCKING CLAMP FOR IMPROVED LOCK RELIABILITY

Originally designed and patented in 1966, Sealmaster® SKWEZLOC® the concentric lock has become the standard in concentric locking and has been redesigned* to accommodate “commercial” grade turned & polished (T&P) shaft tolerances. This new design also provides improved lock reliability on the turned ground & polished (T&P) shaft tolerances.

 

SKWEZLOC concentric locking collar clamp design results in near-perfect concentricity of the shaft-to-bearing bore and maintains near-perfect ball path roundness while reducing fretting corrosion. This design eliminates the shaft damage of setscrew locking and minimizes bearing induced vibration for smoother quieter operation. The collar has a TORX Plus®  head cap screw that outlasts stripping 12 times longer than hex head cap screws.

 

 


Find the right parts for your application based on: dimension, power, speed, service factor as well as other environmental conditions.



sealmaster

NEXT GENERATION

sealmaster

SHAFT
DIAMETER
OLD TOLARANCE RANGE
TURNED, GROUND &
POLISHED (TG&P)
NEW TOLARANCE 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"

NEW DESIGN FEATURES

  • Innovative circumferential groove on the inner ring bore that improves shaft grip and reduces raceway distortion for quieter smoother operation allowing for improved lock reliability.

  • Larger cap screw and collar for improved clamping force to the shaft.

  • Designed for use on “commercial” T&P shafting**, potential user cost reduction on shafting by specifying “commercial” tolerances.

  • Same simple single screw installation, no axial movement during installation or risk of preloading the bearing which is concerns when using an adapter lock design.

  • Patent-pending design.

Notes:

* No change to part numbers; this will be rolling implementation.
** Maximum speed rating on commercial (T&P) shafting to setscrew locking; consul bearing catalog.


 
sealmaster

SKWEZLOC®

sealmaster

sealmaster

 

Notes: all values exceed the 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.

 

 

  1. CIRCUMFERENTIAL GROOVE increases inner ring elasticity to improve grip (clamping force) on “undersized” commercial shafting without increasing deformation to inner ring ball path.

  2. LARGER COLLAR & SCREW increase grip and holding power.

  3. OPTIMIZED CHAMFER PROFILE reduces stress concentrations when the collar is tightened.

 

FEA Modeling of Installed Inner Ring

 

sealmaster

 

 

sealmaster

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