Posi-Lok Keyless Shaft Bushings


Posi-Lok keyless shaft bushings (PSL) allow the user to rigidly and reliably secure shaft-mounted components into position for optimal operating results in their machine.


Posi-Loks eliminate the need for keyways that can weaken or cause excess wear to shaft components. All Posi-Lok models easily slide onto a shaft for mounting and provide reliable, zero-backlash performance. They provide excellent concentricity with minimal radial and axial runout.


Posi-Lok-K Series is a single taper, flanged design, and is available in 4 different models:

  1. The PSL-K model is the most economical version, having an unplated alloy steel construction with black oxided socket head cap screws for mounting.
  2. The PSL-K-B has the same construction as the PSL-K but includes black oxided hex head screws to allow radial access for mounting the bushing in applications with limited axial space.
  3. The PSL-K-C has nickel-plated steel construction and uses plated, socket head cap screws for mounting in applications that require corrosion resistance.
  4. The PSL-K-F is a stainless steel version of the PSL-K series, with specially coated stainless steel socket head cap screws for mounting in applications requiring a stainless steel material.


Posi-Lok-G Series is an economical, dual taper design, offering the highest torque capacity in the Posi-Lok family. It's directly interchangeable with a handful of other brand bushings. It has a flangeless design, so it can be recessed in the bore of the mounted component for space-saving. It's also available in the PSL-G-C series, which is a nickel-plated version having the same dimensions as the PSL-G, adding a corrosion-protected option to the line-up. The PSL-G series supports shaft sizes from 19 to 120 mm.


Posi-Lok D Series is a single taper flangeless design, allowing for a smaller OD and size for the connected component. It is also available in a PSL-D-C model with nickel plating for corrosion protection. The PSL-D series are available for shaft sizes from 6 to 50 mm.


Posi-Lok M Series is a single taper design with a stepped flange that provides a self-centering feature and increased concentricity in an alloy steel construction. It is available for shaft sizes from 20 to 50 mm.

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