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Standard Abrasives™ A/O Unitized Wheel 852109, 521 2 in x 1/4 in x 1/8 in, 10 per case

Part Number 8521093M ID 66000029794UPC 00051115353796
  • Soft density wheel blends surfaces to a smooth finish
  • Soft density offers exceptional conformability which is especially important for applications with close tolerances
  • Cuts faster than Standard Abrasives™ Buff and Blend non-woven products, though with less flexibility
  • Runs clockwise and counterclockwise, allowing greater flexibility and versatility when paired with tools and machines
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Specifications
Attribute Name
Value
Attachment Type
Center Hole
Brand
Standard Abrasives™
Center Hole Diameter
0.125 in
Center Hole Diameter (Metric)
3.175 mm
Density Rating
Soft
Diameter
2 in
Diameter (Metric)
50.8 mm
Form Type
Unitized
Grade
Medium
Max RPM
18000
Mineral Type
Aluminum Oxide
Product Form
Wheel
Width
0.25 in
Width (Metric)
6.35 mm
Product Details
  • Soft density wheel blends surfaces to a smooth finish
  • Soft density offers exceptional conformability which is especially important for applications with close tolerances
  • Cuts faster than Standard Abrasives™ Buff and Blend non-woven products, though with less flexibility
  • Runs clockwise and counterclockwise, allowing greater flexibility and versatility when paired with tools and machines
  • Open web is load resistant, contributing to longer abrasive service life
  • Center hole wheel attaches to tool with a unitized wheel mandrel (sold separately)

The soft, conformable density of the Standard Abrasives™ Aluminum Oxide Unitized Wheel 500 Series makes it a good match for light-pressure cleaning, blending and finishing on flat or contoured parts. When strict dimension tolerances are required, these non-woven abrasive wheels offer operators the finesse needed to deliver precise results.

Standard Abrasives™ Aluminum Oxide Unitized Wheel - 500 Series
Use on softer metals for light deburring and edge radiusing
Soft Density Wheel Offers Multi-Purpose Utility
Among Standard Abrasives™ Unitized Wheels, the 500 Series provides the softest density, and is available in medium and fine grades suitable for light-weight cleaning, blending, and finishing. Use our Standard Abrasives™ Aluminum Oxide Unitized Wheel 500 Series wheels for general purpose cleaning or cleaning prior to painting. Trust them to effectively remove rust discoloration from welds, and remove minor pits and scratches, as well as lightweight resins or adhesives overspray and coating. They are a good match for polishing fillet areas on jet blades and soft metals prior to the coating process. They may also be used on softer metals for light deburring and edge radiusing. Due to their conformability, these wheels are great for projects with strict tolerances, because they respond to surface irregularities.

Compatible with a Variety of Tools
Unitized wheels are typically used on a die grinder. A benefit of unitized wheels is that they are bi-directional and can be mounted on a tool or pedestal grinder without regard to the direction of the spindle rotation. This means the Standard Abrasives™ Unitized Wheel can be used with a variety of tools, and regardless of which way the workpiece is fed through the machine, the wheel will be able to respond, giving operators more flexibility. The stiffness of the unitized construction enables operators to use thinner wheels to access awkward angles with grinding tools.

Series 500 wheels comes in a range of diameters from 1-12" and require a unitized wheel mandrel (sold separately) for attachment to the tool. Quick change wheels are also available (sold separately).

Non-Woven Unitized Construction Offers a Step Up in Density and Durability for Stubborn Surface
Standard Abrasives™ Unitized Wheels are a great match for tough deburring, cleaning, blending and finishing applications. They come in a broad range of densities and grades to suit different metals, the degree of aggressiveness required, shape of the part, and desired finish. Although used for some of the same tasks as Standard Abrasives™ Buff and Blend products, they are designed with a far stronger and denser construction to support more aggressive applications and accomplish material removal more rapidly. Even though unitized wheels are much stiffer products, the non-woven nylon fibers of the wheel maintain the advantage of responding to surface irregularities while preserving the geometry of the piece, and produce a consistent finish.

Unitized wheels are created by starting with layers of open web material that combines non-woven fiber strands and abrasive mineral with a tough resin bond. These layers of web are then cured and compressed together. By fusing layers of open web, the abrasive gains more toughness and durability, so it can withstand repeated wear.

Ultimately, the wheel's durability is what makes it such a good match for edges. Regardless of the diameter or thickness of the wheel, it maintains its structural integrity to remain a stiff and long-lasting abrasive. Additionally, as the layers wear, the wheel can be dressed to maintain its shape.

Load-Resistant Construction Boosts Life and Performance
Standard Abrasives™ Unitized Wheels are load-resistant to keep you cutting with fresh mineral. The gaps in the open web allow unwanted swarf to escape. Consequently, less debris clogs the abrasive, so the mineral can stay fresh, keep cutting sharp and deliver a consistent cut over the life of the product. As the fibers break down and fresh mineral is exposed, it reduces the likelihood of dull or blunt mineral smearing the surface, contributing to cleaner surfaces and less re-work. Furthermore, manual fatigue that may result from applying heavy pressure to a dull abrasive is reduced.

The Many Benefits of Standard Abrasives™ Non-Woven Products
Standard Abrasives™ Unitized Wheels offer many benefits for heavy-duty jobs. For all the aforementioned reasons, Standard Abrasives™ Unitized Wheels invigorate deburring, cleaning, blending and finishing applications by helping operators reduce finishing steps, minimize costs and achieve greater throughput.

Standard Abrasives Unitized Wheel Applications

          Unitized Wheel Line
Less
Agressive
Recommended
Starting
Point
More
Agressive
Most
Agressive
  500 Series 600 Series 700 Series 800 Series 900 Series
Product Applications
Deburr   631 731 821 913, 993
Clean 521 631 731   921
Blend 524 631   821 921
Finish 532 632 732   921
Performance Characteristics
Increase Durability - More productivity and longer lasting
Increased Edge Durability  
Non-woven Construction - Resists loading
Non-metalic - No contamination of work piece
Smear Resistant Formula
Conforms to Work Piece - Prevents undercutting/gouging; less operator fatigue
Materials
Ferrous
Non-Ferrous
Aluminum 731 821  
Stainless Steel
High Nickel/Chrome Alloys
Titanium 532 632 732    
Composites    
Grades
Coarse      
Medium    
Fine    

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Large Volume Order

If you are considering a large purchase of this or other 3M Abrasive products our inside sales team is ready to help by providing additional information and options that our industrial customers typically seek when making abrasive procurement decisions. Our technical expertise, customer support, and global capabilities put us in a unique position to address your biggest challenges, and we’ll do our best to prove that we should be your abrasive supplier of choice.


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