20.5" Aluminum Sanding Beam Block

Aluminum Radius Sanding Beam 20.5" (520mm) length

24 reviews Write a Review

Order 4 or more sanding beams and receive 15% off each sanding beam!  Discount automatically applied in cart. 

  • 20.5" (520mm) Aluminum Radius Sanding Beam
  • Extruded Aluminum
  • Anodized matte finish
  • 20.5" (520mm) length
  • 2 3/4" (70mm) width
  • 1 1/4" (32mm) tall
  • Weight - 2 1/4lb (36oz)
  • Qty 1 - pick the radius using drop down menu above

Use this precision made aluminum sanding block for putting a radius on a fingerboard or leveling frets.  With its heavy weight, extra thick external walls and double internal support, you can be confident that the radius and straightness will stay accurate for years to come.  Not effected by moisture or temperature like wooded radius sanding beams.

Uses standard 2 3/4" PSA longboard sandpaper rolls.

24 Reviews Hide Reviews Show Reviews

  • 5

    Posted by test on Sep 20, 2020


  • 5
    Great product

    Posted by Terry on Sep 4, 2020

    Very well made, strait and true from all angles. Best investment you can make if your building guitars.

  • 5
    Sanding beam

    Posted by David Nelson on May 7, 2020

    One wor; great. Did one of my strat’s neck with the 20 and came out perfect. All of these are the perfect tool for this. I’ll be getting a few more of these to complete the set. The weight of the large beams is perfect to let it glide down the fretboard to set the radius. I always get great tools from PLT.

  • 5
    Great product.

    Posted by rubright@sbcglobal.net on Apr 4, 2020

    Great quality.

  • 5

    Posted by Joe on Mar 17, 2020

    This sanding beam is the highest quality. When you need one, you need this one.

  • 5

    Posted by Darryl on Feb 13, 2020

    This tool is as good as it gets.

  • 2
    Bow in Sanding beam

    Posted by Donald on Feb 10, 2020

    The machining of the interior of the sanding beam appears to be true and flat however the extrusion on the one that I received has a bow in it about 1/8 of an inch measured in the center. There is no way to reference the interior sanding surface with the exterior of the extrusion, so it makes it difficult to use a fence to guide the beam. It would be nice if on the ends of the beam, corresponding high spots were marked so that you could at least align those with the center of the fretboard.

    The response from customer support was “You will be fine to run it along one (side) of a fence since you will be sliding the sanding beam. Any deviation will even itself out since you are moving the beam.” However, if the deviation “will even itself out” then you are taking more material off the sides of the fretboard and you are not getting the true radius of the sanding beam, as a result the fret press caul will not seat the frets properly.

    I didn’t expect a precision edge on the beam, however a 1/8 inch bow over a 20.5 inch length of extrusion is pretty poor in my opinion. Typical acceptable tolerances for the straightness of aluminum extrusions are 0.012" per foot which would result in an allowable bow of .020 inches for this length of beam.

  • 5
    Superb Radius Beam

    Posted by Mark Merrill on Jan 14, 2020

    Absolutely perfect milling and finish. Milled true and with a perfect radius throughout the length. Used my own shop made radius blocks for years. Decided to give this a try. Very satisfied with this superb product!

  • 5
    20.5 Sanding Beam

    Posted by Shawn MacNeal on Oct 20, 2019

    This is the nicest I’ve ever used. Extremely flat the entire length and the radius is perfect The price at Philadelphia Luthier is always the best.