4" x 21" Aluminum Oxide Sanding Belt


Pack Size:
1 Belt

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Product Description

4" x 21" Aluminum Oxide Sanding Belt

Name: 4” x 21” Aluminum Oxide Sanding Belt
Description: 4” x 21” Aluminum Oxide Sanding belt for four inch by twenty one inch belt sanders are manufactured with extremely tough, tear resistant, x weight backing and top of the line aluminum oxide abrasive grains. Perfect for sanding grinding or polishing jobs ranging from wood working, cabinet making, and furniture sanding to metal grinding and finishing. These 4" wide 21" long Aluminum Oxide sanding belts are some of the most used abrasive belts due to their diverse array of sanding applications and their affordable price. These 4" x 21" sanding belts a perfect option for day to day deburring, sanding down splinters or jagged edges. 4” x 21” Aluminum Oxide sanding belts come in 40 grit and 60 grit for more aggressive stock removal, 80 grit, 100 grit and 120 grit grit for medium to light sanding, as well as 220 grit, 320 grit, 400 grit, 600 grit, 800 grit, and 1000 grit for fine sanding and polishing. BUILT IN USA.
Other Features:
  • Bi-Directional - the belt can be run in either direction.
  • Closed Coated - 100% of the belt is covered in abrasive grains.
Suitable For: Most Ferrous metals (including cast iron, carbon steel, alloy steel, wrought iron), composites, plastics and wood.
Width: 4″
Length: 21″
Grit: 40, 60, 80, 100, 120, 180, 220, 320, 400, 600, 800, 1000
Material: Aluminum Oxide
Belt Backing Weight: X-Weight

4" x 21" Portable Belt Sander

Quantity: 1 Belt Per Order

Looking for a different size, material or grit? We have access to an extensive amount of hard to find sanding belts. Please contact us and let us know what your looking for.

Reviews Write a Review

  • 5
    4”X21” belt sander belts

    Posted by Daniel Dow on Jan 14th 2020

    These belts did a great job. I am very happy with the quality. I’ve finished a job that required these belts. The that I previously purchased in town of Longview Wa. Came apart at the seem almost instantaneously. It is nice to find a company like Empire Abrasives that produces a quality product. Thank you Empire and Ben.

  • 5
    4x21 sanding belts

    Posted by paul fisher on Aug 23rd 2019

    I got 69 and 80 grit and they did what I wanted

  • 5
    grate belts 4 x 21

    Posted by Unknown on Jul 12th 2019

    these belts work grate and the service was out standing

  • 5
    Good product, good price.

    Posted by Martin Ciura on May 22nd 2019

    I was pleased to find sanding belts on your site.
    I have an odd size (4 x 21) and they are just about
    impossible to find locally (Cleveland).
    I'll be needing some 1" strip for my next order.

  • 4
    4x21 sanding belts

    Posted by carl costanzo on May 19th 2019

    great belts and good price