Overview
United Abrasives 77212 SAIT-LOK surface conditioning discs are industrial-grade non-woven abrasives designed for metalworking, fabrication, and welding applications. Each 3-inch disc features aluminum oxide grain bonded to non-woven synthetic fiber, delivering consistent performance across heavy-duty deburring, weld spatter removal, blending, and rust cleanup tasks without damaging base materials.
Key Features
- All-metal attachment ensures secure, reliable fit to standard backing pads (sold separately)
- Non-woven synthetic fiber construction resists loading and clogging for extended life
- Aluminum oxide grain coating—coarse (brown) grade for aggressive stock removal
- Suitable for stainless steel, mild steel, aluminum, and cast iron work
- ANSI B7.1 compliant; manufactured to OSHA safety standards
Technical Specifications
- Disc diameter: 3 inches
- Grit grade: Coarse (Brown)
- Abrasive material: Aluminum oxide
- Backing: Non-woven synthetic fiber
- Attachment: All-metal SAIT-LOK
- Pack quantity: 25 discs per pack
- Part number: 77212
Typical Applications
- Weld finishing: Remove weld spatter, smooth bead edges, and blend welds
- Deburring: Heavy stock removal and edge finishing on fabricated parts
- Surface preparation: Rust removal, scale cleaning, and mill mark blending
- Metal polishing: Cleaning and light finishing on stainless and mild steel
- Maintenance: Preventive surface treatment and surface conditioning in machine shops
Compatibility & Replacements
Compatible With
- 3-inch backing pads (standard orbital or pneumatic sanders)
- Right-angle pneumatic and electric grinders with 3″ backing pad support
- Bench grinders and hand-held power tools requiring 3″ disc diameter
- Industrial fabrication and welding shops using ANSI standard attachments
Replaces / Drop-In Replacement For
- 3-inch surface conditioning discs from competing manufacturers (coarse grade equivalent)
- Verify compatibility with your current 3-inch backing pad before ordering.
Works With
- United Abrasives SAIT-LOK R surface conditioning discs (same family, screw-threaded variant)
- Standard 3-inch backing pad assemblies from major tool manufacturers
- Pneumatic and electric rotary sanders rated for 3-inch discs
- Manual tool attachment systems using all-metal SAIT-LOK fastening
