3M 7100284663 Cubitron Ii Hookit 900DZ Sanding Disc 40+

Product Description

The 3M 7100284663 is the Cubitron II Hookit 900DZ ceramic abrasive sanding disc, designed for high-speed material removal on metal, wood, fiberglass, gelcoat, and composite substrates. It uses 3M Precision-Shaped Grain, a triangular ceramic mineral that slices through material rather than gouging or plowing like conventional abrasives. This geometry allows the disc to cut up to two times faster than standard aluminum oxide or silicon carbide abrasives. The disc is rated to 12000 RPM and carries a 40-plus grit designation, placing it in the coarse range for aggressive stock removal. A J-weight cloth backing provides tear resistance and flexibility for edge work and surface preparation tasks. Installation and use require a compatible Hookit random orbital or disc sander.

This disc is suited for metal fabrication, woodworking, paint preparation, and composite de-flashing applications in both shop and field environments. The open-coat construction resists loading from sawdust, metal swarf, and sanding debris, keeping the cutting surface active throughout the disc life. An anti-static treatment neutralizes electrical charge generated during sanding, which is especially relevant on wood substrates where static-charged dust clings to the disc, workpiece, and equipment. The Hookit loop-and-hook attachment system allows fast disc swaps without tools, making it practical for production environments where disc changes are frequent. Suitable for use by fabricators, woodworkers, body shop technicians, and composite repair professionals.

Key Features

• 3M Precision-Shaped Grain ceramic mineral cuts up to two times faster than conventional abrasives
• Open-coat construction resists clogging from sawdust, metal swarf, and composite debris
• Anti-static treatment minimizes swarf adhesion during wood and composite sanding
• J-weight cloth backing delivers flexibility for edge sanding combined with tear resistance for durability
• Hookit loop-and-hook attachment system enables tool-free disc changes and supports full disc life reuse
• Performs on aluminum, fiberglass, gelcoat, hard wood, soft wood, and composite substrates

Compatibility

Designed for use with 3M Hookit disc pads and compatible random orbital or disc sanders equipped with a hook-face backup pad. Verify disc diameter against the sander backup pad before use.

Installation Notes

This disc is installed and replaced by fabricators, woodworkers, or technicians operating compatible Hookit sanders. Confirm the sander is powered off and unplugged before attaching or removing the disc. Press the disc firmly against the Hookit backup pad to ensure full hook engagement before operating at speed. Do not exceed the rated 12000 RPM maximum speed marked on the disc.

Technical Specifications

• Grit: 40 Plus
• Maximum Speed: 12000 RPM
• Abrasive Grain Type: Ceramic Precision-Shaped Grain
• Backing Material: J-weight cloth
• Coat Type: Open coat
• Attachment System: Hookit loop-and-hook
• Weight: 0.03 pounds
• UPC: 00638060901700

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100284663