Slip Stream 24/7 – Global Supply and Distribution Company providing 3M Industrial, Commercial & Safety Solutions
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SKU 7100142462
Legacy SKU 60440243537
UPC 00051141284033
Part Number 28403

Having the right tool system for the job is an essential part of any application. 3M engineered the 3M™ Grinders to power abrasives and accessories — making your cutting, grinding, blending or finishing jobs fast, easy and efficient.

  • 3M™ Gripping Material helps reduce vibration and enhance operator comfort
  • Steel guard may be repositioned for better visibility
  • Side handle may be removed or repositioned to accommodate right-hand or left-hand use
  • Exhaust systems direct exhaust air away from workpiece and operator for reduced surface contamination and optimal operator comfort and safety
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On it's way to you October 5   


Minimum Order 1 Item
Order Increment 1 Item
  High-Quality Equipment
  Fast, Global Shipping
  Fantastic Price
Product Dimensions
Imperial Metric
Width 7.44 in 18.9 cm
Length 12-1/2 in 31.75 cm
Height 4.63 in 11.75 cm
Diameter 4 in 101.6 mm
Shipping Dimensions
Weight 4.01 lb
Length 12.5 in
Width 7.438 in
Height 4.625 in
Thread Size 3/8-24 EXT
Maximum Speed 12,000 rpm


  1. What is the maximum speed of the 3M™ Grinder 28403, T27, 4 in, 3/8 in-24 EXT?

    The maximum speed of this grinder is 12,000 RPM.

  2. How powerful is the motor on this grinder?

    This grinder has a powerful one horsepower (1 HP) motor.

  3. What type of grinding wheel works best with this product?

    For optimal performance and results, we recommend using our selection of high-quality abrasive wheels that are designed specifically for use with this grinder.

  4. Is there any warranty available for this product?

    Yes! Our customers can enjoy peace of mind with our comprehensive warranty program. Please contact us directly for more information on specific coverage and terms.

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.
Balancing Power and Comfort

The 3M™ Grinders are pneumatically powered with reliable, high output motors that come in 1 HP and 1.5 HP. These high output motors allow operators to apply significant pressure without interrupting tool performance, resulting in faster work completion. The 3M™ Gripping Material enables a firmer hold on the tool, minimizes vibration, and insulates the operator from possible hot or cold touch temperatures. These characteristics enhance operator comfort and control, making these lightweight, powerful tools a user-friendly option for tackling tough metalworking applications. The grinder also features a removable and repositionable side handle, allowing operators to run the grinder right or left-handed.

Grinder Variations

3M™ Grinders are available in a few variations. The 4" grinders with a 3/8 - 24" EXT thread are commonly used in ship-building and other applications that require smaller abrasives. They're great for weld leveling and blending, metal preparation, and plasma cut clean-up. The 4-1/2" grinders with a 5/8 - 11" EXT thread are great for metal fabrication applications, including grinding, blending, weld leveling, metal prep, and pipe notching. Both grinders are offered in standard or extended lengths. Typically, extended versions are ideal for hard-to-reach areas, and the addition of a second grip places the operator's hand further from the grinding area for safer operation.

Use with Type 27 Abrasives

3M engineered the 3M™ Grinders to be used with Type 27 wheels or discs, which have a depressed center. A depressed center enables the flange to sink into the abrasive, so the abrasive may be used for grinding and cutting applications without risking marring or gouging the workpiece. The accompanying steel guard on the grinder has an open face and can be re-positioned for greater visibility of the work area. Some Type 27 abrasives will have a threaded hub that mounts directly to the grinder, while other Type 27 abrasives require flanges to mount to the tool. For optimal safety, operators should always read and follow manual safety instructions and ensure the tool's operating speed does not exceed the maximum RPM imprinted on the tool.


The 3M™ Grinders are powerful and reliable, designed to help you tackle your toughest metalworking applications. With their high output motors, 3M™ Gripping Material, and removable side handle, these grinders provide both power and comfort to operators. Available in different variations and compatible with Type 27 abrasives, these grinders are a versatile and user-friendly option for metalworking professionals.

Brochures, Catalogs & Data Sheets
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