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SKU 7100193272
Legacy SKU 60440321739
UPC 00638060394052
Product Number 366UZ

3M™ Paper Belt 366UZ is constructed with our premium aluminum oxide mineral in closed coat format.  It is an anti-static product that resists loading, and is coated on a heavy F-weight paper backing to efficiently sand and finish flat surfaces in woodworking applications.

  • Heavy F-weight paper backing provides durability and smooth operation
  • Anti-static treatment helps manage dust and loading
  • Film media splice provides strong joint and smooth running belt in either direction
  • Premium aluminum oxide mineral provides aggressive cut and long abrasive life
  • Closed coat provides greater grain density and finer finish on hard woods than open coat abrasives
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On it's way to you December 15  


Minimum Order 2 Items
Order Increment 2 Items
  Incredibly Versatile
  Easy to use
  Excellent Cut Rate
Product Dimensions
Imperial Metric
Width 91 in 2311.4 mm
Length 110 in 2794 mm
Shipping Dimensions
Weight 34.75 lb
Length 111.6 in
Width 18.9 in
Height 10.6 in
Grit P320


  1. What is the 3M™ Paper Belt 366UZ made of?

    The 3M™ Paper Belt 366UZ is made up of a premium aluminum oxide mineral abrasive that provides excellent cut rate and consistent finish.

  2. Can I use the 3M™ Paper Belt 366UZ for wet sanding?

    No, you cannot. The Film-lok feature on this belt prevents it from being used in wet sanding applications.

  3. How many belts come in each case of the 3M™ Paper Belt 366UZ?

    There are two belts included in each case of the product.

  4. What grit size does the P320 F-weight paper have and what finishes can it achieve?

    The P320 grit size produces a fine finished surface suitable for metalworking and wood finishing applications such as varnish preparation, blunting raised grain or texture, and removing rust stains.

  5. Is this belt easy to install on my machine?

    . Yes! You can simply tear off individual sheets with ease because its load-resistant coating also reduces clogging to keep your equipment running smoothly. Also, attaching and changing these belts in your machinery would not be difficult if they match specified dimensions.

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.

3M™ Paper Belt 366UZ is a premium abrasive belt that features F-weight paper backing, which is one of the heaviest and most rigid paper backings available. This paper backing provides smooth operation and durability, allowing for finer finishes than cloth backed belts in the same grade. The abrasive side of the belt features a closed coat structure that provides greater grain density to achieve finer finishes than open coat belts.

In addition to its paper backing, this belt also features 3M dust management technology that reduces static in the dust particles, allowing them to be pulled away more easily when coupled with an efficient dust collection system. The belt ends are joined using a film media splice, which is a strong secure bond consisting of a thin film-joining media that also minimizes chatter marks and ensures a smooth running belt in either direction for consistent finishing results.

3M™ Paper Belt 366UZ features a premium aluminum oxide abrasive, which is a popular choice among industrial professionals because of its cut-rate and long life. This mineral is a tough, durable abrasive that self-fractures to expose fresh cutting edges in use, whereas traditional abrasives, such as garnet, quickly wear down with use. Due to its high cut-rate, hardness, strength, and low heat retention, aluminum oxide mineral is widely used for sanding and finishing applications. Aluminum oxide is suitable on a wide variety of substrates in both woodworking and metalworking, including ferrous alloys.

Abrasive belts come in many different widths and lengths and are used on a variety of different belt sanders for many different applications on both wood and metal. 3M offers a broad selection of belts to fit most any industrial belt sander. Wider belts are used to dimension and sand large wood panels, smooth rough cut edges of metal sheets, or add a grain pattern to stainless steel sheets and medium-width belts fit onto edge or portable belt sanders for sanding or blending wood pieces such as cabinet doors.

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