Standard Locknut Miether


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PRW28 PRW Series

PRW28 - PRW Series, Lockwashers, Products

PRW28

This series of lockwashers is coupled with PRN, and PRL series precision locknuts.  Lockwashers engage a keyway in a shaft or adapter sleeve slot, then locks the accompanying locknut in position by bending one of the washer tabs into the nut’s outside diameter slots. 

Features and benefits

  • High precision locking component for high speed applications.
  • Very high installation accuracy.
  • Dimensionally interchangeable with standard series washers if required.
  • Standard Locknut sets the industry locknut standard


  • PRW lockwashers have no tang angle for higher operational accuracy.
  • Can be mounted directly to the shaft or on an adapter sleeve.
  • A new lockwasher should be used each time the corresponding PRN / PRL locknut and assembly is reinstalled.
  • Unless otherwise specified, manufactured from AISI grade 1020 series steel.
  • Most suitable for applications requiring an exceptional level of accuracy such as machine tools, automation equipment and precision machinery.
Dimensions
R 5.582 INCH Bore
E 6.531 INCH Face Diameter
B 7.625 INCH Dia. over Tangs
S 0.59 INCH Key Width
X 5.352 INCH Inside Dia.
NOTAN 19 INCH No. of Tangs
T 0.52 INCH Tang Width
Q 0.111 INCH Material Thickness
Weight LB/100