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The 3M 7000028377 is a hard rubber backup pad engineered to support Roloc 3-inch (75 mm) diameter abrasive discs. The pad features an M10-1.5 internal thread, allowing direct mounting to tools equipped with M10-1.5 external threaded shafts. A large 11/16-inch hex nut is incorporated into the design for secure installation and removal. This type of backup pad is commonly installed by metalworkers, auto body technicians, and fabricators who use rotary disc grinding and finishing systems in production or repair environments.
This pad is suited for use with 3-inch Roloc abrasive discs in grinding, blending, and surface preparation applications. It is compatible with pneumatic and electric angle grinders and die grinders that accept M10-1.5 external threaded spindles. The hard rubber construction provides firm disc support, making it well suited for aggressive stock removal and edge work where a rigid backing improves cut consistency.
Designed for use with 3M Roloc 3-inch (75 mm) diameter abrasive discs and tools with M10-1.5 external threaded spindles.
Installation is typically performed by metalworkers or body technicians using standard open-end or box wrenches sized to the 11/16-inch hex nut. Always power down and disconnect the tool from its air supply or electrical source before mounting or removing the pad. Ensure the spindle thread is clean and undamaged before threading the pad on by hand, then snug with a wrench. Do not overtighten, as this can stress the pad body or damage the threaded spindle.
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