3M™ Grinder 28405, T27 4-1/2 in x 5/8 in-11 External 1 hp, 1 ea/Case

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.
Special Price $976.94 Regular Price $1,149.34
UPC 00051141284057
3M ID 7100142326
Packaging Case
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Balancing Power and Comfort

The 3M™ Grinders are pneumatically powered with a reliable, high output motors — available in 1 HP and 1.5 HP. High output motors allow operators to apply significant pressure without interrupting tool performance, which results in the work getting done faster. 3M™ Gripping Material enables a firmer hold on the tool, minimizes vibration, and insulates the operator from possible hot or cold touch temperatures. Altogether, these characteristics enhance operator comfort and control and make these lightweight, powerful tools a user-friendly option for tackling tough metalworking applications. A removable and repositionable side handle means operators can run the grinder right or left handed.

Grinder Variations

3M™ Grinders are available in a few variations. 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. 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 and not risk 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.

Altogether, the 3M™ Grinders are powerful and reliable, designed to help you tackle your toughest metalworking applications.


  • 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
More Information
3M ID 7100142326
Part number 28405
Keywords Gripping Material, surface conditioning, metalworking
Global Product Hierarchy Tools & Equipment > Power Tools > Power Grinders
Application Deburring, Finishing, Grinding, Sanding, Surface Finishing, Surface Preparation
Net Weight (Imperial) 4.33 lb
Net Weight (Metric) 1.97 kg
Product Type simple
Quantity 0
Trademark 1 3M™
Weight Pound (kg) 4.33 (1.97)
Country of Origin United States
Sales Unit EA
SAP Shelf Life In Days 0
Base - Billing Unit EA
Base - Metric Gross Weight 1965.869 G
Base - Item Quantity 1
Base - Unit EA
Unit of Use - Billing Unit EA
Unit of Use - Customary Cubic Dimension 429.97922019466085 ci
Unit of Use - Customary Gross Weight 4.3339992689912314 lbs
Unit of Use - Customary Net Weight 3.7789987516765327 lbs
Unit of Use - Metric Cubic Dimension 7046.097 CCM
Unit of Use - Metric Net Weight 1714.125 G
Unit of Use - Item Quantity 1
Unit of Use - Total Unit Quantity 1
Unit of Use - Previous Packaging Level Quantity 1
Unit of Use - Item Unit EACH
Unit of Use - Unit EA
Shipper - Billing Unit EA
Shipper - Customary Cubic Dimension 429.97922019466085 ci
Shipper - Customary Gross Weight 4.3339992689912314 lbs
Shipper - Customary Net Weight 3.7789987516765327 lbs
Shipper - Customary Height Dimension 4.624803149606299 in
Shipper - Customary Length Dimension 12.5 in
Shipper - Customary Width Dimension 7.437795275590551 in
Shipper - Metric Cubic Dimension 7046.097 CCM
Shipper - Metric Weight 1965.869 G
Shipper - Metric Net Weight 1714.125 G
Shipper - Metric Height Dimension 11.747 CM
Shipper - Metric Length Dimension 31.75 CM
Shipper - Metric Width Dimension 18.892 CM
Shipper - Item Quantity 1
Shipper - Total Unit Quantity 1
Shipper - Previous Packaging Level Quantity 1
Shipper - Previous Packaging Level Unit EACH
Shipper - Item Unit EACH
Shipper - Unit CS
Pallet - Billing Unit EA
Pallet - Customary Cubic Dimension 93976.56590588772 ci
Pallet - Customary Gross Weight 752.9998796055586 lbs
Pallet - Customary Net Weight 612.1972466159428 lbs
Pallet - Customary Height Dimension 46.62992125984252 in
Pallet - Customary Length Dimension 48.0 in
Pallet - Customary Width Dimension 42.0 in
Pallet - Metric Cubic Dimension 1.54 M3
Pallet - Metric Net Weight 277.688 KG
Pallet - Metric Height Dimension 118.44 CM
Pallet - Metric Length Dimension 121.92 CM
Pallet - Metric Width Dimension 106.68 CM
Pallet - Item Quantity 162
Pallet - Total Unit Quantity 162
Pallet - Previous Packaging Level Quantity 162
Pallet - Previous Packaging Level Unit BOX
Pallet - Item Unit EACH
Pallet - Unit PAL
Pallet - Pallet Layer Quantity 9
Pallet - Shipping Container Per Layer Quantity 18
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